"# \u897f\u95e8\u5b50S7-200 Modbus RTU \u901a\u4fe1\u65b9\u6cd5\n\n> 2022-09-19 | 2022-09-19\n> https:\/\/www.modbus.cn\/en\/10895.html\n\n**\u5de5\u4e1a\u7269\u8054\u7f51**\n\n---\n\nS7-200 \u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u652f\u6301 Modbus RTU \u901a\u4fe1\u534f\u8bae\uff1a\n\n- S7-200 CPU \u4e0a\u7684\u901a\u4fe1\u53e3 0\uff08Port 0\uff09\u901a\u8fc7\u6307\u4ee4\u5e93\u652f\u6301 Modbus RTU \u4ece\u7ad9\u6a21\u5f0f- S7-200 CPU \u4e0a\u7684\u901a\u8baf\u53e3 0 \u548c 1 \uff08Port 0 \u548c Port 1\uff09\u901a\u8fc7\u6307\u4ee4\u5e93\u652f\u6301 Modbus RTU \u4e3b\u7ad9\u6a21\u5f0f\n\n\u5728 S7-200 CPU \u901a\u4fe1\u53e3\u4e0a\u5b9e\u73b0\u7684\u662f RS485 \u534a\u53cc\u5de5\u901a\u4fe1\uff0c\u4f7f\u7528\u7684\u662f S7-200 \u7684\u81ea\u7531\u53e3\u529f\u80fd\u3002\n\u901a\u8fc7 S7-200 CPU \u901a\u4fe1\u53e3\u7684\u81ea\u7531\u53e3\u6a21\u5f0f\u5b9e\u73b0 Modbus \u901a\u4fe1\u534f\u8bae\uff0c\u53ef\u4ee5\u901a\u8fc7\u65e0\u7ebf\u6570\u636e\u7535\u53f0\u7b49\u6162\u901f\u901a\u4fe1\u8bbe\u5907\u4f20\u8f93\u3002 \u8fd9\u4e3a\u7ec4\u6210 S7-200 \u4e4b\u95f4\u7684\u7b80\u5355\u65e0\u7ebf\u901a\u4fe1\u7f51\u7edc\u63d0\u4f9b\u4e86\u4fbf\u5229\u3002\n\u8be6\u7ec6\u60c5\u51b5\u8bf7\u53c2\u8003\u300aS7-200\u7cfb\u7edf\u624b\u518c\u300b\uff082002 \u5e74 10 \u6708\u6216\u4ee5\u540e\u7248\u672c\uff09\u7684\u76f8\u5e94\u7ae0\u8282\u3002\n\n### S7-200 \u662f\u5426\u652f\u6301 Modbus ASCII \u901a\u4fe1\u6a21\u5f0f\uff1f\n\n\u897f\u95e8\u5b50s7-200\u4e0d\u63d0\u4f9b\u652f\u6301\u4e0a\u8ff0\u6a21\u5f0f\u7684\u7684\u73b0\u6210\u6307\u4ee4\u5e93\uff0c\u9700\u8981\u7528\u6237\u81ea\u5df1\u7528\u81ea\u7531\u53e3\u6a21\u5f0f\u7f16\u7a0b\u3002\n\n## Modbus RTU\u4e3b\u7ad9\n\n### Modbus RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\n\n\u897f\u95e8\u5b50\u5728 Micro\/WIN V4.0 SP5 \u4e2d\u6b63\u5f0f\u63a8\u51fa Modbus RTU \u4e3b\u7ad9\u534f\u8bae\u5e93\uff08\u897f\u95e8\u5b50\u6807\u51c6\u5e93\u6307\u4ee4\uff09\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/09\/1663548191-image.png)\u56fe 1. \u897f\u95e8\u5b50\u6807\u51c6\u6307\u4ee4\u5e93\uff08Micro\/WIN V4.0 SP5\uff09\n\n**\u6ce8\u610f**:\n\n1. Modbus RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\u7684\u529f\u80fd\u662f\u901a\u8fc7\u5728\u7528\u6237\u7a0b\u5e8f\u4e2d\u8c03\u7528\u9884\u5148\u7f16\u597d\u7684\u7a0b\u5e8f\u529f\u80fd\u5757\u5b9e\u73b0\u7684\uff0c\u8be5\u5e93\u5bf9 Port 0 \u548c Port 1 \u6709\u6548\u3002\u8be5\u6307\u4ee4\u5e93\u5c06\u8bbe\u7f6e\u901a\u4fe1\u53e3\u5de5\u4f5c\u5728\u81ea\u7531\u53e3\u6a21\u5f0f\u4e0b\u3002\n\n2. Modbus RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\u4f7f\u7528\u4e86\u4e00\u4e9b\u7528\u6237\u4e2d\u65ad\u529f\u80fd\uff0c\u7f16\u5176\u4ed6\u7a0b\u5e8f\u65f6\u4e0d\u80fd\u5728\u7528\u6237\u7a0b\u5e8f\u4e2d\u7981\u6b62\u4e2d\u65ad\u3002\n\n3. Modbus RTU \u4e3b\u7ad9\u5e93\u5bf9CPU\u7684\u7248\u672c\u6709\u8981\u6c42\u3002CPU \u7684\u7248\u672c\u5fc5\u987b\u4e3a 2.00 \u6216\u8005 2.01\uff08\u5373\u8ba2\u8d27\u53f7\u4e3a 6ES721*\uff0d***23-0BA*\uff09\uff0c1.22\u7248\u672c\u4e4b\u524d\uff08\u5305\u62ec1.22\u7248\u672c\uff09\u7684 S7-200 CPU \u4e0d\u652f\u6301\u3002\n\n\u4f7f\u7528 Modbus RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\uff0c\u53ef\u4ee5\u8bfb\u5199 Modbus RTU \u4ece\u7ad9\u7684\u6570\u5b57\u91cf\u3001\u6a21\u62df\u91cf I\/O \u4ee5\u53ca\u4fdd\u6301\u5bc4\u5b58\u5668\u3002\n\n\u8981\u4f7f\u7528 Modbus RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\uff0c\u987b\u9075\u5faa\u4e0b\u5217\u6b65\u9aa4\uff1a\n\n**1.**\u5b89\u88c5\u897f\u95e8\u5b50\u6807\u51c6\u6307\u4ee4\u5e93\n\n**2.**\u6309\u7167\u8981\u6c42\u7f16\u5199\u7528\u6237\u7a0b\u5e8f\u8c03\u7528 Modubs RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\n\n### Modbus RTU \u4e3b\u7ad9\u529f\u80fd\u7f16\u7a0b\n\n#### \u8c03\u7528 Modbus RTU \u4e3b\u7ad9\u521d\u59cb\u5316\u548c\u63a7\u5236\u5b50\u7a0b\u5e8f\n\n\u4f7f\u7528 SM0.0 \u8c03\u7528 MBUS_CTRL \u5b8c\u6210\u4e3b\u7ad9\u7684\u521d\u59cb\u5316\uff0c\u5e76\u542f\u52a8\u5176\u529f\u80fd\u63a7\u5236\uff1a\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/09\/1663548353-image.png)\u56fe 2. \u7528 SM0.0 \u8c03\u7528 Modbus RTU \u4e3b\u7ad9\u521d\u59cb\u5316\u4e0e\u63a7\u5236\u5b50\u7a0b\u5e8f\n\n\u5404\u53c2\u6570\u610f\u4e49\u5982\u4e0b:\n\na. EN \u4f7f\u80fd\uff1a \u5fc5\u987b\u4fdd\u8bc1\u6bcf\u4e00\u626b\u63cf\u5468\u671f\u90fd\u88ab\u4f7f\u80fd\uff08\u4f7f\u7528 SM0.0\uff09\n\nb. Mode \u6a21\u5f0f\uff1a \u4e3a 1 \u65f6\uff0c\u4f7f\u80fd Modbus \u534f\u8bae\u529f\u80fd\uff1b\u4e3a 0 \u65f6\u6062\u590d\u4e3a\u7cfb\u7edf PPI \u534f\u8bae\n\nc. Baud \u6ce2\u7279\u7387\uff1a \u652f\u6301\u7684\u901a\u8baf\u6ce2\u7279\u7387\u4e3a1200\uff0c2400\uff0c4800\uff0c9600\uff0c19200\uff0c38400\uff0c57600\uff0c115200\u3002\n\nd. Parity \u6821\u9a8c\uff1a \u6821\u9a8c\u65b9\u5f0f\u9009\u62e9\n\n**0\uff1d\u65e0\u6821\u9a8c\n1\uff1d\u5947\u8f83\u9a8c\n2\uff1d\u5076\u8f83\u9a8c**\n\ne. Timeout \u8d85\u65f6\uff1a \u4e3b\u7ad9\u7b49\u5f85\u4ece\u7ad9\u54cd\u5e94\u7684\u65f6\u95f4\uff0c\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\uff0c\u5178\u578b\u7684\u8bbe\u7f6e\u503c\u4e3a 1000 \u6beb\u79d2\uff081 \u79d2\uff09\uff0c\u5141\u8bb8\u8bbe\u7f6e\u7684\u8303\u56f4\u4e3a 1 - 32767\u3002\n   \u6ce8\u610f\uff1a \u8fd9\u4e2a\u503c\u5fc5\u987b\u8bbe\u7f6e\u8db3\u591f\u5927\u4ee5\u4fdd\u8bc1\u4ece\u7ad9\u6709\u65f6\u95f4\u54cd\u5e94\u3002\n\nf. Done \u5b8c\u6210\u4f4d\uff1a \u521d\u59cb\u5316\u5b8c\u6210\uff0c\u6b64\u4f4d\u4f1a\u81ea\u52a8\u7f6e1\u3002\u53ef\u4ee5\u7528\u8be5\u4f4d\u542f\u52a8 MBUS_MSG \u8bfb\u5199\u64cd\u4f5c\uff08\u89c1\u4f8b\u7a0b\uff09\n\ng. Error \u521d\u59cb\u5316\u9519\u8bef\u4ee3\u7801\uff08\u53ea\u6709\u5728 Done \u4f4d\u4e3a1\u65f6\u6709\u6548\uff09\uff1a\n\n**0\uff1d \u65e0\u9519\u8bef\n1\uff1d \u6821\u9a8c\u9009\u62e9\u975e\u6cd5\n2\uff1d \u6ce2\u7279\u7387\u9009\u62e9\u975e\u6cd5\n3\uff1d \u6a21\u5f0f\u9009\u62e9\u975e\u6cd5**\n\n#### \u8c03\u7528 Modbus RTU \u4e3b\u7ad9\u8bfb\u5199\u5b50\u7a0b\u5e8fMBUS_MSG\uff0c\u53d1\u9001\u4e00\u4e2aModbus \u8bf7\u6c42\uff1b\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/09\/1663548627-image.png)\u56fe 3. \u8c03\u7528Modbus RTU \u4e3b\u7ad9\u8bfb\u5199\u5b50\u7a0b\u5e8f\n\n\u5404\u53c2\u6570\u610f\u4e49\u5982\u4e0b:\n\na. EN \u4f7f\u80fd\uff1a \u540c\u4e00\u65f6\u523b\u53ea\u80fd\u6709\u4e00\u4e2a\u8bfb\u5199\u529f\u80fd\uff08\u5373 MBUS_MSG\uff09\u4f7f\u80fd\n\n\u6ce8\u610f\uff1a\u5efa\u8bae\u6bcf\u4e00\u4e2a\u8bfb\u5199\u529f\u80fd\uff08\u5373 MBUS_MSG\uff09\u90fd\u7528\u4e0a\u4e00\u4e2a MBUS_MSG \u6307\u4ee4\u7684 Done \u5b8c\u6210\u4f4d\u6765\u6fc0\u6d3b\uff0c\u4ee5\u4fdd\u8bc1\u6240\u6709\u8bfb\u5199\u6307\u4ee4\u5faa\u73af\u8fdb\u884c\uff08\u89c1\u4f8b\u7a0b\uff09\u3002\n\nb. First \u8bfb\u5199\u8bf7\u6c42\u4f4d\uff1a \u6bcf\u4e00\u4e2a\u65b0\u7684\u8bfb\u5199\u8bf7\u6c42\u5fc5\u987b\u4f7f\u7528\u8109\u51b2\u89e6\u53d1\n\nc. Slave \u4ece\u7ad9\u5730\u5740\uff1a \u53ef\u9009\u62e9\u7684\u8303\u56f4 1 - 247\n\nd. RW \u4ece\u7ad9\u5730\u5740\uff1a 0 \uff1d \u8bfb\uff0c 1 \uff1d \u5199\n\n\u6ce8\u610f\uff1a\n\n1.\u5f00\u5173\u91cf\u8f93\u51fa\u548c\u4fdd\u6301\u5bc4\u5b58\u5668\u652f\u6301\u8bfb\u548c\u5199\u529f\u80fd\n\n2.\u5f00\u5173\u91cf\u8f93\u5165\u548c\u6a21\u62df\u91cf\u8f93\u5165\u53ea\u652f\u6301\u8bfb\u529f\u80fd \n\ne. Addr \u8bfb\u5199\u4ece\u7ad9\u7684\u6570\u636e\u5730\u5740\uff1a \n\n\u9009\u62e9\u8bfb\u5199\u7684\u6570\u636e\u7c7b\u578b \n\n00001 \u81f3 0xxxx - \u5f00\u5173\u91cf\u8f93\u51fa\n\n10001 \u81f3 1xxxx - \u5f00\u5173\u91cf\u8f93\u5165\n\n30001 \u81f3 3xxxx - \u6a21\u62df\u91cf\u8f93\u5165\n\n40001 \u81f3 4xxxx - \u4fdd\u6301\u5bc4\u5b58\u5668 \n\nf. Count \u6570\u636e\u4e2a\u6570 \u901a\u8baf\u7684\u6570\u636e\u4e2a\u6570\uff08\u4f4d\u6216\u5b57\u7684\u4e2a\u6570\uff09 \n\n\u6ce8\u610f\uff1a Modbus\u4e3b\u7ad9\u53ef\u8bfb\/\u5199\u7684\u6700\u5927\u6570\u636e\u91cf\u4e3a120\u4e2a\u5b57\uff08\u662f\u6307\u6bcf\u4e00\u4e2a MBUS_MSG \u6307\u4ee4\uff09 \n\ng. DataPtr \u6570\u636e\u6307\u9488\uff1a 1. \u5982\u679c\u662f\u8bfb\u6307\u4ee4\uff0c\u8bfb\u56de\u7684\u6570\u636e\u653e\u5230\u8fd9\u4e2a\u6570\u636e\u533a\u4e2d\n\n\u5982\u679c\u662f\u5199\u6307\u4ee4\uff0c\u8981\u5199\u51fa\u7684\u6570\u636e\u653e\u5230\u8fd9\u4e2a\u6570\u636e\u533a\u4e2d\n\nh. Done \u5b8c\u6210\u4f4d \u8bfb\u5199\u529f\u80fd\u5b8c\u6210\u4f4d\n\ni. Error \u9519\u8bef\u4ee3\u7801\uff1a \u53ea\u6709\u5728 Done \u4f4d\u4e3a1\u65f6\uff0c\u9519\u8bef\u4ee3\u7801\u624d\u6709\u6548\n\n**0 \uff1d \u65e0\u9519\u8bef**\n\n**1 \uff1d \u54cd\u5e94\u6821\u9a8c\u9519\u8bef**\n\n**2 \uff1d \u672a\u7528**\n\n**3 \uff1d \u63a5\u6536\u8d85\u65f6\uff08\u4ece\u7ad9\u65e0\u54cd\u5e94\uff09**\n\n**4 \uff1d \u8bf7\u6c42\u53c2\u6570\u9519\u8bef\uff08slave address, Modbus address, count, RW\uff09**\n\n**5 \uff1d Modbus\/\u81ea\u7531\u53e3\u672a\u4f7f\u80fd**\n\n**6 \uff1d Modbus\u6b63\u5728\u5fd9\u4e8e\u5176\u5b83\u8bf7\u6c42**\n\n**7 \uff1d \u54cd\u5e94\u9519\u8bef\uff08\u54cd\u5e94\u4e0d\u662f\u8bf7\u6c42\u7684\u64cd\u4f5c\uff09**\n\n**8 \uff1d \u54cd\u5e94CRC\u6821\u9a8c\u548c\u9519\u8bef**\n\n-\n\n**101 \uff1d \u4ece\u7ad9\u4e0d\u652f\u6301\u8bf7\u6c42\u7684\u529f\u80fd\n102 \uff1d \u4ece\u7ad9\u4e0d\u652f\u6301\u6570\u636e\u5730\u5740\n103 \uff1d \u4ece\u7ad9\u4e0d\u652f\u6301\u6b64\u79cd\u6570\u636e\u7c7b\u578b\n104 \uff1d \u4ece\u7ad9\u8bbe\u5907\u6545\u969c\n105 \uff1d \u4ece\u7ad9\u63a5\u53d7\u4e86\u4fe1\u606f\uff0c\u4f46\u662f\u54cd\u5e94\u88ab\u5ef6\u8fdf\n106 \uff1d \u4ece\u7ad9\u5fd9\uff0c\u62d2\u7edd\u4e86\u8be5\u4fe1\u606f\n107 \uff1d \u4ece\u7ad9\u62d2\u7edd\u4e86\u4fe1\u606f\n108 \uff1d \u4ece\u7ad9\u5b58\u50a8\u5668\u5947\u5076\u9519\u8bef**\n\n\u5e38\u89c1\u7684\u9519\u8bef\uff1a\n\n\u5982\u679c\u591a\u4e2a MBUS_MSG \u6307\u4ee4\u540c\u65f6\u4f7f\u80fd\u4f1a\u9020\u6210 6 \u53f7\u9519\u8bef\n\n\u5e93\u5b58\u50a8\u533a\u88ab\u7a0b\u5e8f\u5176\u5b83\u5730\u65b9\u590d\u7528\uff0c\u6709\u65f6\u4e5f\u4f1a\u9020\u62106 \u53f7\u9519\u8bef\n\n\u4ece\u7ad9 delay \u53c2\u6570\u8bbe\u7684\u65f6\u95f4\u8fc7\u957f\u4f1a\u9020\u6210\u4e3b\u7ad9 3 \u53f7\u9519\u8bef\n\n\u4ece\u7ad9\u6389\u7535\u6216\u4e0d\u8fd0\u884c\uff0c\u7f51\u7edc\u6545\u969c\u90fd\u4f1a\u9020\u6210\u4e3b\u7ad9 3 \u53f7\u9519\u8bef\n\n#### \u5728 CPU \u7684 V \u6570\u636e\u533a\u4e2d\u4e3a\u5e93\u6307\u4ee4\u5206\u914d\u5b58\u50a8\u533a\uff08Library Memory\uff09\n\nModbus Master \u6307\u4ee4\u5e93\u9700\u8981\u4e00\u4e2a284\u4e2a\u5b57\u8282\u7684\u5168\u5c40 V \u5b58\u50a8\u533a\u3002\n\n### 1.3 \u5173\u4e8e Modbus RTU \u4e3b\u7ad9\u534f\u8bae\u53ca\u5730\u5740\n\n\u6b64\u4e3a\u897f\u95e8\u5b50\u6b63\u5f0f\u63a8\u51fa\u7684\u6807\u51c6\u5e93\u6307\u4ee4\u8bf4\u660e\u8d44\u6599\u3002\n\n**\u5728 Modbus RTU Master \u534f\u8bae\u548c PPI \u534f\u8bae\u4e4b\u95f4\u5207\u6362\uff1a**\n\nModbus RTU Master \u534f\u8bae\u6307\u4ee4\u5e93\u4f7f\u901a\u4fe1\u53e3\u5de5\u4f5c\u5728\u81ea\u7531\u53e3\u6a21\u5f0f\u4e0b\uff0c\u6b64\u65f6\u4e0d\u80fd\u4e0e Micro\/WIN \u8f6f\u4ef6\u901a\u4fe1\u3002\u8981\u5728\u5207\u6362\u56de PPI \u534f\u8bae\uff0c\u53ef\u4ee5\uff1a\n\n- \u5c06 MBUS_CTRL \u6307\u4ee4\u7684 Mode \u8f93\u5165\u7aef\u8bbe\u7f6e\u4e3a\u903b\u8f91\"0\"- \u5c06 CPU \u7684\u5141\u8bb8\u6a21\u5f0f\u9009\u62e9\u5f00\u5173\u7f6e\u4e3a STOP \u4f4d\u7f6e\n\n**Modbus RTU Master \u534f\u8bae\u5e93\u7684\u6267\u884c\u65f6\u95f4\uff1a**\n\nModbus RTU Master \u534f\u8bae\u5e93\u7684 MBUS_CTRL \u6307\u4ee4\u4e0d\u9700\u8981\u5f88\u957f\u7684\u6267\u884c\u65f6\u95f4\u3002MBUS_\u9700\u8981 1.11 ms \u7528\u4e8e\u521d\u59cb\u5316\uff0c\u5728\u540e\u7eed\u7684\u6bcf\u4e2a\u626b\u63cf\u5468\u671f\u4e2d\u53ea\u5360\u7528 0.41 ms\u3002\n\n\u8c03\u7528 MBUS_MSG \u5b50\u7a0b\u5e8f\u4f1a\u52a0\u957f\u5904\u7406\u65f6\u95f4\u3002\u5927\u90e8\u5206\u65f6\u95f4\u90fd\u7528\u4e8e CRC \u6821\u9a8c\u7684\u8ba1\u7b97\u3002\u6bcf\u8bfb\u3001\u5199\u4e00\u4e2a\u5b57\u7684\u6570\u636e\u5c31\u9700\u8981 1.85 ms \u626b\u63cf\u65f6\u95f4\u3002\u6570\u636e\u6700\u591a\u7684\u60c5\u51b5\u4e0b\uff08\u8bfb\u3001\u5199 120 \u5b57\u7684\u6570\u636e\uff09\uff0c\u626b\u63cf\u65f6\u95f4\u5927\u6982\u4f1a\u6269\u589e\u52a0 222 ms\u3002\u8bfb\u64cd\u4f5c\u7684\u65f6\u95f4\u4e3b\u8981\u6d88\u8017\u5728\u63a5\u6536\u6570\u636e\u4e0a\uff1b\u5199\u64cd\u4f5c\u7684\u65f6\u95f4\u4e3b\u8981\u6d88\u8017\u5728\u53d1\u9001\u6570\u636e\u4e0a\u3002\n\n**Modbus \u5730\u5740**\n\n\u901a\u5e38 Modbus \u5730\u5740\u7531 5 \u4f4d\u6570\u5b57\u7ec4\u6210\uff0c\u5305\u62ec\u8d77\u59cb\u7684\u6570\u636e\u7c7b\u578b\u4ee3\u53f7\uff0c\u4ee5\u53ca\u540e\u9762\u7684\u504f\u79fb\u5730\u5740\u3002Modbus Master \u534f\u8bae\u5e93\u628a\u6807\u51c6\u7684 Modbus \u5730\u5740\u6620\u5c04\u4e3a\u6240\u8c13 Modbus \u529f\u80fd\u53f7\uff0c\u8bfb\u5199\u4ece\u7ad9\u7684\u6570\u636e\u3002Modbus Master \u534f\u8bae\u5e93\u652f\u6301\u5982\u4e0b\u5730\u5740\uff1a\n\n- 00001 - 09999\uff1a\u6570\u5b57\u91cf\u8f93\u51fa\uff08 \u7ebf\u5708\uff09- 10001 - 19999\uff1a\u6570\u5b57\u91cf\u8f93\u5165\uff08\u89e6\u70b9\uff09- 30001 - 39999\uff1a\u8f93\u5165\u6570\u636e\u5bc4\u5b58\u5668\uff08\u901a\u5e38\u4e3a\u6a21\u62df\u91cf\u8f93\u5165\uff09- 40001 - 49999\uff1a\u6570\u636e\u4fdd\u6301\u5bc4\u5b58\u5668\n\n**Modbus Master \u534f\u8bae\u5e93\u652f\u6301\u7684\u529f\u80fd**\n\n\u4e3a\u4e86\u652f\u6301\u4e0a\u8ff0 Modbus \u5730\u5740\u7684\u8bfb\u5199\uff0cModbus Master \u534f\u8bae\u5e93\u9700\u8981\u4ece\u7ad9\u652f\u6301\u4e0b\u5217\u529f\u80fd\uff1a\n\n\u8868 1. \u9700\u8981\u4ece\u7ad9\u652f\u6301\u7684\u529f\u80fd\n\n**Modbus \u5730\u5740****\u8bfb\/\u5199****Modbus \u4ece\u7ad9\u987b\u652f\u6301\u7684\u529f\u80fd****00001 - 09999** **\u6570\u5b57\u91cf\u8f93\u51fa**\u8bfb\u529f\u80fd\u7801 1**00001 - 09999** **\u6570\u5b57\u91cf\u8f93\u51fa**\u5199\u529f\u80fd\u7801 5\uff1a\u5199\u5355\u8f93\u51fa\u70b9\n\u529f\u80fd\u7801 15\uff1a\u5199\u591a\u8f93\u51fa\u70b9**10001 - 19999** **\u6570\u5b57\u91cf\u8f93\u5165**\u8bfb\u529f\u80fd\u7801 2**10001 - 19999** **\u6570\u5b57\u91cf\u8f93\u5165**\u5199-**30001 - 39999** **\u8f93\u5165\u5bc4\u5b58\u5668**\u8bfb\u529f\u80fd\u7801 4**30001 - 39999** **\u8f93\u5165\u5bc4\u5b58\u5668**\u5199-**40001 - 49999\u4fdd\u6301\u5bc4\u5b58\u5668**\u8bfb\u529f\u80fd\u7801 3**40001 - 49999\u4fdd\u6301\u5bc4\u5b58\u5668**\u5199\u529f\u80fd 6\uff1a\u5199\u5355\u5bc4\u5b58\u5668\u5355\u5143\n\u529f\u80fd 16\uff1a\u5199\u591a\u5bc4\u5b58\u5668\u5355\u5143\n\n**Modbus \u5730\u5740\u548c S7-200 \u5b58\u50a8\u533a\u5730\u5740\u7684\u6620\u5c04**\n\nS7-200 \u901a\u8fc7 Modbus Master \u548c Slave \u534f\u8bae\u5e93\u901a\u4fe1\u65f6\uff0cModbus \u5730\u5740\u548c S7-200 \u5185\u5b58\u50a8\u533a\u5730\u5740\u7684 \u6620\u5c04\u5173\u7cfb\u90fd\u7c7b\u4f3c\u3002\n\n![](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/09\/20250830163205905.png)\n\nModbus \u6570\u5b57\u91cf\u5730\u5740\u6620\u5c04\u4e3e\u4f8b\uff1a\n\n\u4f4d\u5730\u5740\uff080xxxx \u548c 1xxxx\uff09\u6570\u636e\u603b\u662f\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u6253\u5305\u8bfb\u5199\u3002\u7b2c\u4e00\u4e2a\u5b57\u8282\u4e2d\u7684\u6700\u4f4e\u6709\u6548\u4f4d\u5bf9\u5e94 Modbus \u5730\u5740\u7684\u8d77\u59cb\u5730\u5740\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a\n\n![6](https:\/\/image.modbus.cn\/wp-content\/uploads\/2022\/09\/20250830163208129.png)\n\n\u56fe 4. \u6570\u5b57\u91cf\u5730\u5740\u6620\u5c04\u4e3e\u4f8b\n\n### 1.4 Modbus RTU \u4e3b\u7ad9\u4f8b\u7a0b\n\n\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3 Modbus \u4e3b\u7ad9\u7684\u7f16\u7a0b\uff0c\u53ef\u53c2\u8003\u4e0b\u9762\u7684\u4f8b\u7a0b\u3002\n\n\u4f8b\u5b50\u7a0b\u5e8f1: \u591a\u4e2aMBUS_MSG\u6307\u4ee4\u8f6e\u8be2\u6267\u884c\uff0c\n\n**\u6ce8\u610f**\n\n- 1. \u8be5\u4f8b\u7a0b\u4f7f\u7528 Micro\/WIN V4.0 SP5 \u4fdd\u5b58\u3002- 2. \u8be5\u4f8b\u7a0b\u4ec5\u8bbf\u95ee\u4e00\u4e2a\u4ece\u7ad9\uff0c\u82e5\u8bbf\u95ee\u4e0d\u540c\u7684\u4ece\u7ad9\uff0c\u53ef\u901a\u8fc7\u6539\u53d8\u4ece\u7ad9\u5730\u5740\u6765\u5b9e\u73b0\u3002\n\n[Modbus RTU \u4e3b\u7ad9\u6307\u4ee4\u5e93\u5e94\u7528\u4f8b\u7a0b](http:\/\/www.ad.siemens.com.cn\/service\/article\/download\/modbus_master_polling.zip)\n\n**\u4f8b\u5b50\u7a0b\u5e8f2\uff1a\u53cd\u590d\u6fc0\u6d3b\u5355\u4e2aMBUS_MSG\u6307\u4ee4\uff1a**\n\n[Modbus RTU \u4e3b\u7ad9\u53d8\u5740\u65b9\u5f0f\u8f6e\u8be2\u8bbf\u95ee\u5e94\u7528\u4f8b\u7a0b](http:\/\/www.ad.siemens.com.cn\/service\/article\/download\/modbus_master_1_MSG.zip)\n\n**\u6ce8\u610f\uff1a**\u6b64\u6307\u4ee4\u5e93\/\u7a0b\u5e8f\u7684\u4f5c\u8005\u548c\u62e5\u6709\u8005\u5bf9\u4e8e\u8be5\u8f6f\u4ef6\u7684\u529f\u80fd\u6027\u548c\u517c\u5bb9\u6027\u4e0d\u8d1f\u4efb\u4f55\u8d23\u4efb\u3002\u4f7f\u7528\u8be5\u8f6f\u4ef6\u7684\u98ce\u9669\u5b8c\u5168\u7531\u7528\u6237\u81ea\u884c\u627f\u62c5\u3002\u7531\u4e8e\u5b83\u662f\u514d\u8d39\u7684\uff0c\u6240\u4ee5\u4e0d\u63d0\u4f9b\u4efb\u4f55\u62c5\u4fdd\uff0c\u9519\u8bef\u7ea0\u6b63\u548c\u70ed\u7ebf\u652f\u6301\uff0c\u7528\u6237\u4e0d\u5fc5\u4e3a \u6b64\u8054\u7cfb\u897f\u95e8\u5b50\u6280\u672f\u652f\u6301\u4e0e\u670d\u52a1\u90e8\u95e8\u3002\n\n### 1.5 Modbus RTU \u4e3b\u7ad9\u5e38\u95ee\u95ee\u9898\n\nModbus RTU \u4e3b\u7ad9\u5e93\u5bf9 CPU \u7684\u7248\u672c\u662f\u5426\u6709\u8981\u6c42\uff0c\u4e3a\u4ec0\u4e48\u7f16\u8bd1\u4f8b\u5b50\u7a0b\u5e8f\u65f6\uff0c\u4f1a\u9047\u5230 4 \u4e2a\u9519\u8bef\uff1f\n\nModbus RTU \u4e3b\u7ad9\u5e93\u5bf9 CPU \u7684\u7248\u672c\u786e\u5b9e\u6709\u8981\u6c42\uff0cCPU \u7684\u7248\u672c\u5fc5\u987b\u4e3a 2.00 \u6216\u8005 2.01(\u5373\u8ba2\u8d27\u53f7\u4e3a6ES721*\uff0d***23-0BA*)\uff0c1.22 \u7248\u672c\u4e4b\u524d\uff08\u5305\u62ec 1.22 \u7248\u672c\uff09\u7684 S7-200 CPU \u4e0d\u652f\u6301\u3002\n\nModbus \u6307\u4ee4\u5e93\u542f\u52a8\u540e\uff0c\u5982\u4f55\u901a\u8fc7\u540c\u4e00\u4e2a\u901a\u4fe1\u7aef\u53e3\u8fdb\u884c CPU \u76d1\u63a7\uff1f\n\nModbus \u6307\u4ee4\u5e93\u4f7f\u7528\u7684\u662f CPU \u7684\u81ea\u7531\u53e3\u901a\u4fe1\u529f\u80fd\uff0c\u5de5\u4f5c\u5728\u81ea\u7531\u53e3\u6a21\u5f0f\u4e0b\u7684\u901a\u8baf\u53e3\u4e0d\u80fd\u4f7f\u7528 Micro\/WIN \u7684 PPI \u7f16\u7a0b\u901a\u4fe1\u76d1\u63a7\u3002\u5982\u679c\u901a\u4fe1\u53e3\u90fd\u5df2\u7ecf\u88ab\u5360\u7528\uff0c\u53ef\u4ee5\u8003\u8651\uff1a\n\n- \u52a0\u4e00\u4e2a\u901a\u4fe1\u6a21\u5757\uff08\u5982 EM 277\u3001CP 243-1\u3001EM 241 \u7b49\uff09\u6269\u5c55\u51fa\u4e00\u4e2a\u7f16\u7a0b\u901a\u4fe1\u53e3- \u4e2d\u6b62\u81ea\u7531\u53e3\u6a21\u5f0f\uff0c\u53ef\u4ee5\u5c06 CPU \u4e0a\u7684\u6a21\u5f0f\u5f00\u5173\u4ece RUN \u62e8\u5230 STOP\uff1b\u6216\u8005\u4fdd\u6301\u5904\u4e8e RUN \u72b6\u6001\uff0c\u7528\u7a0b\u5e8f\u505c\u6b62\u6307\u4ee4\u5e93\u7684 Modbus \u6a21\u5f0f\uff08\u53c2\u89c1\u6307\u4ee4\u5e93\u5e94\u7528\uff09\n\n \u5982\u4f55\u7406\u89e3 Modbus \u5730\u5740\u4e0e\u529f\u80fd\u7801\u7684\u533a\u522b\uff1f\n\nModbus \u5730\u5740\u4e0e Modbus \u7684\u529f\u80fd\u7801\u662f\u4e24\u4e2a\u5c42\u6b21\u7684\u6982\u5ff5\u3002\n\n\u6839\u636e Modbus \u901a\u4fe1\u534f\u8bae\uff0cModbus \u6570\u636e\u7684\u5730\u5740\u4f7f\u7528 0xxxx\u30011xxxx\u30013xxxx \u548c 4xxxx \u7684\u5f62\u5f0f\uff0c\u5206\u522b\u8868\u793a\u6570\u5b57\u91cf\u8f93\u51fa\u3001\u6570\u5b57\u91cf\u8f93\u5165\u3001\u6a21\u62df\u91cf\u8f93\u5165\u7b49\u6570\u636e\u5730\u5740\u3002\u5728\u4f7f\u7528 S7-200 \u7684\u6307\u4ee4\u5e93\u65f6\uff0cModbus \u6570\u636e\u5730\u5740\u4e0e S7-200 \u7684 I\/O \u548c\u6570\u636e\u5b58\u50a8\u533a\u5730\u5740\u95f4\u6709\u7279\u5b9a\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\n\n\u6709\u4e9b\u8bbe\u5907\u8868\u660e\u5b83\u652f\u6301 Modbus RTU \u901a\u4fe1\u534f\u8bae\uff0c\u4f46\u4e5f\u8be6\u7ec6\u63d0\u4f9b\u4e86\u8bfb\u5199\u6570\u636e\u7684\u8be6\u7ec6\u901a\u4fe1\u5e27\u683c\u5f0f\uff0c\u5176\u4e2d\u5305\u62ec\u5982\u4f55\u6307\u5b9a Modbus \u7ad9\u7684\u5730\u5740\uff0c\u9700\u8981\u8bfb\u5199\u6570\u636e\u7c7b\u578b\u3001\u957f\u5ea6\u7b49\u7b49\u3002\u6570\u636e\u5e27\u6709\u7279\u5b9a\u5b57\u8282\u6307\u51fa\u6b64\u6307\u4ee4\u8bfb\u5199\u7684\u6570\u636e\u7c7b\u578b\u548c\u5730\u5740\uff0c\u6b64\u5b57\u8282\u7684\u6570\u636e\u5185\u5bb9\u5373\u6240\u8c13\"\u529f\u80fd\u7801\"\uff0c\u5982\u529f\u80fd 1 \u6307\u5b9a\u8bfb\u53d6\u5355\u4e2a\/\u591a\u4e2a\u6570\u5b57\u91cf\u8f93\u51fa\u70b9\u7684\u503c\u3002\n\n\u652f\u6301 Modbus \u534f\u8bae\u7684\u8bbe\u5907\u6216\u8f6f\u4ef6\uff0c\u4f7f\u7528\u65f6\u7528\u6237\u76f4\u63a5\u8bbe\u7f6e\u6216\u770b\u5230\u7684\u5e94\u5f53\u662f Modbus \u6570\u636e\u5730\u5740\u3002Modbus \u5730\u5740\u6240\u8bbf\u95ee\u7684\u6570\u636e\uff0c\u662f\u901a\u8fc7\u5404\u79cd\"\u529f\u80fd\"\u8bfb\u5199\u800c\u6765\u3002\u529f\u80fd\u7801\u662f Modbus \u5730\u5740\u7684\u5e95\u5c42\u3002\u5982\u679c Modbus \u901a\u4fe1\u7684\u4e00\u65b9\u63d0\u4f9b\u7684\u6240\u8c13 Modbus \u534f\u8bae\u53ea\u6709\u529f\u80fd\u7801\uff0c\u5219\u9700\u8981\u6ce8\u610f\u4e86\u89e3\u6b64\u529f\u80fd\u53f7\u4e0e Modbus \u5730\u5740\u95f4\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\n\n\u5982\u4f55\u8bbf\u95ee\u5927\u4e8e 9999 \u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u5730\u5740\uff1f\n\n\u901a\u5e38 Modbus \u534f\u8bae\u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u5730\u5740\u8303\u56f4\u5728 40001 - 49999 \u4e4b\u95f4\u3002\u5bf9\u4e8e\u591a\u6570\u5e94\u7528\u6765\u8bf4\u5df2\u7ecf\u591f\u4e86\u3002\u4f46\u6709\u4e9b Modbus \u4ece\u7ad9\u628a\u5730\u5740\u6620\u5c04\u5230\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u7684\u5730\u5740\u8d85\u8fc7 9999 \u7684\u90e8\u5206\u3002\n\nModbus Master \u534f\u8bae\u5e93\u652f\u6301\u8d85\u8fc7 9999 \u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u5730\u5740\u3002\u5730\u5740\u8303\u56f4\u4e3a 400001 - 465536\u3002\u53ea\u9700\u5728\u8c03\u7528 MBUS_MSG \u5b50\u7a0b\u5e8f\u65f6\u7ed9 Addr \u53c2\u6570\u8d4b\u76f8\u5e94\u7684\u503c\u5373\u53ef\uff0c\u5982 416768\u3002\n\n Modubs Master \u6269\u5c55\u5730\u5740\u6a21\u5f0f\u4ec5\u652f\u6301\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\uff0c\u4e0d\u652f\u6301\u5176\u4ed6\u5730\u5740\u7c7b\u578b\u3002\n\nS7-200 \u4f5c\u4e3a Modbus \u4e3b\u7ad9\u65b9\u63a5\u6536\u4e0a\u6765\u7684\u6570\u636e\u683c\u5f0f\u4e0e\u7b2c\u4e09\u65b9\u8bbe\u5907\u4e0d\u4e00\u6837\u600e\u4e48\u529e\uff1f\n\n\u897f\u95e8\u5b50PLC\u6570\u636e\u7684\u5b58\u50a8\u683c\u5f0f\u4e3a\u9ad8\u4f4d\u4f4e\u5b58\u65b9\u5f0f\u3002\u4e3e\u4f8b\uff1aVD200\u4e2d\u5305\u542bVW200\u548cVW202\uff0c\u5176\u4e2dVW202\u662f\u4f4e\u5b57\uff0cVW200\u662f\u9ad8\u5b57\u3002\u82e5\u7b2c\u4e09\u65b9\u8bbe\u5907\u4e0e\u897f\u95e8\u5b50\u6570\u636e\u5b58\u50a8\u683c\u5f0f\u4e0d\u540c\uff0c\u662f\u4f4e\u4f4d\u4f4e\u5b58\u7684\u65b9\u5f0f\uff0c\u90a3\u4e48\u901a\u4fe1\u4e0a\u6765\u7684\u6570\u636e\u5c31\u4f1a\u5b58\u5728\u9519\u8bef\uff0c\u9700\u8981\u8fdb\u884c\u8f6c\u6362\u624d\u80fd\u4f7f\u7528\u3002\u7f16\u7a0b\u7684\u65b9\u5f0f\u6bd4\u8f83\u591a\u6837\uff0c\u9488\u5bf9\u53cc\u5b57\u4e2d\u9ad8\u4f4e\u5b57\u7684\u4ea4\u6362\u53ef\u4ee5\u4f7f\u7528SWAP(\u5b57\u4ea4\u6362\uff09\u6307\u4ee4\uff0c\u82e5\u662f\u5b57\u8282\u4ea4\u6362\u53ef\u4ee5\u8003\u8651\u5faa\u73af\u79fb\u4f4d\u6307\u4ee4\u3002\n\nS7-200 \u662f\u5426\u652f\u6301\u5982 Modbus TCP \u7b49\u5176\u5b83\u534f\u8bae\uff1f\n\n\u4e0d\u652f\u6301\u3002S7-200\u81ea\u8eab\u7684\u901a\u4fe1\u7aef\u53e3\u6216\u5176\u901a\u4fe1\u6269\u5c55\u6a21\u5757\u5747\u4e0d\u652f\u6301 Modbus TCP\u3001CANopen\u3001DeviceNet \u4ee5\u53ca BACnet \u901a\u4fe1\u534f\u8bae\u3002\n\n \u4e3a\u4ec0\u4e48 S7-200 \u4f5c Modbus \u4e3b\u7ad9\u65f6 MBUS_MSG \u6307\u4ee4\u62a56\u53f7\u9519\u8bef\uff1f\n\n\u5f15\u8d776\u53f7\u9519\u8bef\u4e3b\u8981\u6709\u4e24\u65b9\u9762\u7684\u539f\u56e0\uff1a1.\u591a\u4e2a MBUS_MSG \u6307\u4ee4\u540c\u65f6\u4f7f\u80fd\u6267\u884c\uff1b2. Modbus\u5e93\u5b58\u50a8\u533a\u4e2d\u5206\u914d\u7684\u5efa\u8bae\u5730\u5740\u533a\u4e0e\u7f16\u7a0b\u4e2d\u5df2\u4f7f\u7528\u7684V\u5b58\u50a8\u533a\u6709\u91cd\u53e0\u3002\n\n2Modbus RTU\u4ece\u7ad9\n\n### 2.1 CPU \u4e0a\u7684\u901a\u4fe1\u53e3\uff08Port0\uff09\u652f\u6301 Modbus RTU \u4ece\u7ad9\u901a\u4fe1\u534f\u8bae\n\nS7-200 CPU\u4e0a\u7684\u901a\u4fe1\u53e3Port0\u53ef\u4ee5\u652f\u6301Modbus RTU\u534f\u8bae\uff0c\u6210\u4e3aModbus RTU\u4ece\u7ad9\u3002\u6b64\u529f\u80fd\u662f\u901a\u8fc7S7-200\u7684\u81ea\u7531\u53e3\u901a\u4fe1\u6a21\u5f0f\u5b9e\u73b0\uff0c\u56e0\u6b64\u53ef\u4ee5\u901a\u8fc7\u65e0\u7ebf\u6570\u636e\u7535\u53f0\u7b49\u6162\u901f\u901a\u4fe1\u8bbe\u5907\u4f20\u8f93\u3002\n\n \u8be6\u60c5\u8bf7\u53c2\u8003\u300aS7-200\u7cfb\u7edf\u624b\u518c\u300b\u4e4b\u76f8\u5173\u7ae0\u8282\u3002\n\n\u8981\u5b9e\u73b0Modbus RTU\u901a\u4fe1\uff0c\u9700\u8981STEP 7-Micro\/WIN32 V3.2\u4ee5\u4e0a\u7248\u672c\u7684\u7f16\u7a0b\u8f6f\u4ef6\uff0c\u800c\u4e14\u987b\u5b89\u88c5STEP 7-Micro\/WIN32 V3.2 Instruction Library\uff08\u6307\u4ee4\u5e93\uff09\u3002Modbus RTU\u529f\u80fd\u662f\u901a\u8fc7\u6307\u4ee4\u5e93\u4e2d\u9884\u5148\u7f16\u597d\u7684\u7a0b\u5e8f\u529f\u80fd\u5757\u5b9e\u73b0\u7684\u3002\n\n Modbus RTU\u4ece\u7ad9\u6307\u4ee4\u5e93\u53ea\u652f\u6301CPU\u4e0a\u7684\u901a\u4fe10\u53e3\uff08Port0\uff09\u3002\n\n### 2.2 \u7f16\u7a0b\u57fa\u672c\u6b65\u9aa4\uff1a\n\n\u68c0\u67e5Micro\/WIN\u7684\u8f6f\u4ef6\u7248\u672c\uff0c\u5e94\u5f53\u662fSTEP 7-Micro\/WIN V3.2\u4ee5\u4e0a\u7248\u672c\u3002\n\n\u68c0\u67e5Micro\/WIN\u7684\u6307\u4ee4\u6811\u4e2d\u662f\u5426\u5b58\u5728Modbus RTU\u4ece\u7ad9\u6307\u4ee4\u5e93\uff08\u56fe1\uff09\uff0c\u5e93\u4e2d\u5e94\u5f53\u5305\u62ecMBUS_INIT\u548cMBUS_SLAVE\u4e24\u4e2a\u5b50\u7a0b\u5e8f\u3002\u5982\u679c\u6ca1\u6709\uff0c\u987b\u5b89\u88c5Micro\/WIN32 V3.2\u7684Instruction Library\uff08\u6307\u4ee4\u5e93\uff09\u8f6f\u4ef6\u5305\uff1b\n\n\u56fe1. \u6307\u4ee4\u6811\u4e2d\u7684\u5e93\u6307\u4ee4\n\n\u7f16\u7a0b\u65f6\u4f7f\u7528SM0.1\u8c03\u7528\u5b50\u7a0b\u5e8fMBUS_INIT\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u4f7f\u7528SM0.0\u8c03\u7528MBUS_SLAVE\uff0c\u5e76\u6307\u5b9a\u76f8\u5e94\u53c2\u6570\u3002\u5173\u4e8e\u53c2\u6570\u7684\u8be6\u7ec6\u8bf4\u660e\uff0c\u53ef\u5728\u5b50\u7a0b\u5e8f\u7684\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u627e\u5230\uff1b\n\n\u56fe2. \u8c03\u7528Modbus RTU\u901a\u4fe1\u6307\u4ee4\u5e93\n\n\u56fe\u4e2d\u53c2\u6570\u610f\u4e49\u5982\u4e0b\uff1a\n\n- \u6a21\u5f0f\u9009\u62e9\uff1a\u542f\u52a8\/\u505c\u6b62Modbus\uff0c1=\u542f\u52a8\uff1b0=\u505c\u6b62- \u4ece\u7ad9\u5730\u5740\uff1aModbus\u4ece\u7ad9\u5730\u5740\uff0c\u53d6\u503c1~247- \u6ce2\u7279\u7387\uff1a\u53ef\u90091200\uff0c2400\uff0c4800\uff0c9600\uff0c19200\uff0c38400\uff0c57600\uff0c115200- \u5947\u5076\u6821\u9a8c\uff1a0=\u65e0\u6821\u9a8c\uff1b1=\u5947\u6821\u9a8c\uff1b2=\u5076\u6821\u9a8c- \u5ef6\u65f6\uff1a\u9644\u52a0\u5b57\u7b26\u95f4\u5ef6\u65f6\uff0c\u7f3a\u7701\u503c\u4e3a0- \u6700\u5927I\/Q\u4f4d\uff1a\u53c2\u4e0e\u901a\u4fe1\u7684\u6700\u5927I\/O\u70b9\u6570\uff0cS7-200\u7684I\/O\u6620\u50cf\u533a\u4e3a128\/128\uff0c\u7f3a\u7701\u503c\u4e3a128- \u6700\u5927AI\u5b57\u6570\uff1a\u53c2\u4e0e\u901a\u4fe1\u7684\u6700\u5927AI\u901a\u9053\u6570\uff0c\u53ef\u4e3a16\u621632- \u6700\u5927\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\uff1a\u53c2\u4e0e\u901a\u4fe1\u7684V\u5b58\u50a8\u533a\u5b57\uff08VW\uff09- \u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u8d77\u59cb\u5730\u5740\uff1a\u4ee5&VBx\u6307\u5b9a\uff08\u95f4\u63a5\u5bfb\u5740\u65b9\u5f0f\uff09- \u521d\u59cb\u5316\u5b8c\u6210\u6807\u5fd7\uff1a\u6210\u529f\u521d\u59cb\u5316\u540e\u7f6e1- \u521d\u59cb\u5316\u9519\u8bef\u4ee3\u7801- Modbus\u6267\u884c\uff1a\u901a\u4fe1\u4e2d\u65f6\u7f6e1\uff0c\u65e0 Modbus \u901a\u4fe1\u6d3b\u52a8\u65f6\u4e3a 0\u3002- \u9519\u8bef\u4ee3\u7801\uff1a0=\u65e0\u9519\u8bef\n\n\u8868** 1.** \u4ece\u7ad9\u9519\u8bef\u4ee3\u7801\n\n\u9519\u8bef\u4ee3\u7801\u63cf\u8ff00\u65e0\u9519\u8bef1\u5b58\u50a8\u533a\u8303\u56f4\u9519\u8bef2\u975e\u6cd5\u6ce2\u7279\u7387\u6216\u6821\u9a8c3\u975e\u6cd5\u4ece\u7ad9\u5730\u57404Modbus \u53c2\u6570\u7684\u975e\u6cd5\u503c5\u4fdd\u6301\u5bc4\u5b58\u5668\u4e0eModbus\u4ece\u7ad9\u7b26\u53f7\u5730\u5740\u91cd\u590d6\u63a5\u6536\u6821\u9a8c\u9519\u8bef7\u63a5\u6536CRC\u9519\u8bef8\u975e\u6cd5\u529f\u80fd\u8bf7\u6c42\/\u4e0d\u652f\u6301\u7684\u529f\u80fd9\u8bf7\u6c42\u4e2d\u6709\u975e\u6cd5\u5b58\u50a8\u533a\u5730\u574010\u4ece\u7ad9\u529f\u80fd\u672a\u4f7f\u80fd\n\n\u5728CPU\u7684V\u6570\u636e\u533a\u4e2d[\u5206\u914d\u5e93\u6307\u4ee4\u6570\u636e\u533a\uff08Library Memory\uff09](http:\/\/www.ad.siemens.com.cn\/service\/article\/s7-200\/s7-200modbus\/default.aspx#librarymemory)\uff1b\n\n\u5982\u6709\u5fc5\u8981\uff0c\u4f7f\u7528\u4e3b\u7ad9\u8f6f\u4ef6\u6d4b\u8bd5\u3002\n\n**\u6ce8\u610f\uff1a**\u7531\u5b50\u7a0b\u5e8f\u53c2\u6570HoldStart\u548cMaxHold\u6307\u5b9a\u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\uff0c\u662f\u5728S7-200 CPU\u7684V\u6570\u636e\u5b58\u50a8\u533a\u4e2d\u5206\u914d\uff0c\u6b64\u6570\u636e\u533a\u4e0d\u80fd\u548c\u5e93\u6307\u4ee4\u6570\u636e\u533a\u6709\u4efb\u4f55\u91cd\u53e0\uff0c\u5426\u5219\u5728\u8fd0\u884c\u65f6\u4f1a\u4ea7\u751f\u9519\u8bef\uff0c\u4e0d\u80fd\u6b63\u5e38\u901a\u4fe1\u3002\u6ce8\u610fModbus \u4e2d\u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u6309\"\u5b57\"\u5bfb\u5740\uff0c\u5373MaxHold\u89c4\u5b9a\u7684\u662fVW\u800c\u4e0d\u662fVB\u7684\u4e2a\u6570\u3002\n\n\u5728\u56fe2\u7684\u4f8b\u5b50\u4e2d\uff0c\u89c4\u5b9a\u4e86 Modbus \u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u4ece VB0 \u5f00\u59cb\uff08HoldStart \uff1d VB0\uff09\uff0c\u5e76\u4e14\u4fdd\u6301\u5bc4\u5b58\u5668\u4e3a1000\u4e2a\u5b57\uff08MaxHold\uff1d1000\uff09\uff0c\u56e0\u4fdd\u6301\u5bc4\u5b58\u5668\u4ee5\u5b57\uff08\u4e24\u4e2a\u5b57\u8282\uff09\u4e3a\u5355\u4f4d\uff0c\u5b9e\u9645\u4e0a\u8fd9\u4e2a\u901a\u4fe1\u7f13\u51b2\u533a\u5360\u7528\u4e86VB0\uff5eVB1999\u51712000\u4e2a\u5b57\u8282\u3002\u56e0\u6b64\u5206\u914d\u5e93\u6307\u4ee4\u4fdd\u7559\u6570\u636e\u533a\u65f6\u81f3\u5c11\u8981\u4eceVB2000\u5f00\u59cb\u3002\u5f53\u7136\u4fdd\u6301\u533a\u4e0d\u4e00\u5b9a\u8981\u4eceVB0\u5f00\u59cb\u3002\n\n**\u6ce8\u610f\uff1a**\u4f60\u9009\u7528\u7684CPU\u7684V\u5b58\u50a8\u533a\u5927\u5c0f\uff01CPU\u578b\u53f7\u4e0d\u540cV\u6570\u636e\u5b58\u50a8\u533a\u5927\u5c0f\u4e0d\u540c\u3002\u5e94\u6839\u636e\u9700\u8981\u9009\u62e9Modbus\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u57df\u7684\u5927\u5c0f\u3002\n\n\u5305\u542b Modbus RTU \u4ece\u7ad9\u6307\u4ee4\u5e93\u7684\u9879\u76ee\u7f16\u8bd1\u3001\u4e0b\u8f7d\u5230CPU\u4e2d\u540e\uff0c\u5728\u7f16\u7a0b\u8ba1\u7b97\u673a\uff08PG\/PC\uff09\u4e0a\u8fd0\u884c\u4e00\u4e9b Modbus \u6d4b\u8bd5\u8f6f\u4ef6\u53ef\u4ee5\u68c0\u9a8cS7-200\u7684Modbus RTU\u901a\u4fe1\u662f\u5426\u6b63\u5e38\uff0c\u8fd9\u5bf9\u67e5\u627e\u6545\u969c\u70b9\u5f88\u6709\u7528\u3002\u6d4b\u8bd5\u8f6f\u4ef6\u901a\u8fc7\u8ba1\u7b97\u673a\u4e32\u53e3\uff08RS-232\uff09\u548cPC\/PPI\u7535\u7f06\u8fde\u63a5CPU\u3002\u5982\u679c\u5fc5\u8981\uff0c\u987b\u5c06PC\/PPI\u7535\u7f06\u8bbe\u7f6e\u5728\u81ea\u7531\u53e3\u901a\u4fe1\u65b9\u5f0f\u3002\n\n\u53ef\u5230\u4e00\u4e9b\u8f6f\u4ef6\u4e0b\u8f7d\u7f51\u7ad9\u5bfb\u627e\u7c7b\u4f3c\u8f6f\u4ef6\uff0c\u5982 ModScan32 \u7b49\u3002\n\n### 2.3 Modbus RTU \u4ece\u7ad9\u5730\u5740\u4e0eS7-200\u7684\u5730\u5740\u5bf9\u5e94\n\nModbus\u5730\u5740\u603b\u662f\u4ee500001\u300130004\u4e4b\u7c7b\u7684\u5f62\u5f0f\u51fa\u73b0\u3002S7-200\u5185\u90e8\u7684\u6570\u636e\u5b58\u50a8\u533a\u4e0eModbus\u76840\u30011\u30013\u30014\u51714\u7c7b\u5730\u5740\u7684\u5bf9\u5e94\u5173\u7cfb\u5982\u4e0b\uff1a\n\n\u88682. Modbus\u5730\u5740\u5bf9\u5e94\u8868\n\nModbus\u5730\u5740S7-200\u6570\u636e\u533a00001 ~ 00128Q0.0 ~ Q15.710001 ~ 10128I0.0 ~ I15.730001 ~ 30032AIW0 ~ AIW6240001 ~ 4xxxxT ~ T + 2 * (xxxx -1)\n\n\u5176\u4e2dT\u4e3aS7-200\u4e2d\u7684\u7f13\u51b2\u533a\u8d77\u59cb\u5730\u5740\uff0c\u5373 HoldStart\u3002\n\n\u5982\u679c\u5df2\u77e5S7-200\u4e2d\u7684V\u5b58\u50a8\u533a\u5730\u5740\uff0c\u63a8\u7b97Modbus\u5730\u5740\u7684\u516c\u5f0f\u5982\u4e0b\uff1a\n\nModbus\u5730\u5740 = 40000 + (T\/2+1) ; T\u4e3a\u5076\u6570\n\n### 2.4 Modbus RTU \u4ece\u7ad9\u6307\u4ee4\u5e93\u652f\u6301\u7684\u529f\u80fd\u7801\n\nModbus RTU \u4ece\u7ad9\u6307\u4ee4\u5e93\u652f\u6301\u7279\u5b9a\u7684 Modbus \u529f\u80fd\u3002\u8bbf\u95ee\u4f7f\u7528\u6b64\u6307\u4ee4\u5e93\u7684\u4e3b\u7ad9\u5fc5\u987b\u9075\u5faa\u8fd9\u4e2a\u6307\u4ee4\u5e93\u7684\u8981\u6c42\u3002\n\n\u8868 3. Modbus RTU \u4ece\u7ad9\u529f\u80fd\u7801\n\n\u529f\u80fd\u7801\u4e3b\u7ad9\u4f7f\u7528\u76f8\u5e94\u529f\u80fd\u7801\u4f5c\u7528\u4e8e\u6b64\u4ece\u7ad9\u7684\u6548\u75281\u8bfb\u53d6\u5355\u4e2a\/\u591a\u4e2a\u7ebf\u5708\uff08\u79bb\u6563\u91cf\u8f93\u51fa\u70b9\uff09\u72b6\u6001\u3002 \u529f\u80fd 1 \u8fd4\u56de\u4efb\u610f\u4e2a\u6570\u8f93\u51fa\u70b9\uff08Q\uff09\u7684 ON\/OFF \u72b6\u6001\u30022\u8bfb\u53d6\u5355\u4e2a\/\u591a\u4e2a\u89e6\u70b9\uff08\u79bb\u6563\u91cf\u8f93\u5165\u70b9\uff09\u72b6\u6001\u3002 \u529f\u80fd 2 \u8fd4\u56de\u4efb\u610f\u4e2a\u6570\u8f93\u5165\u70b9\uff08I\uff09\u7684 ON\/OFF \u72b6\u6001\u30023\u8bfb\u53d6\u5355\u4e2a\/\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u3002\u529f\u80fd 3 \u8fd4\u56de V \u5b58\u50a8\u533a\u7684\u5185\u5bb9\u3002\u5728 Modbus \u534f\u8bae\u4e0b\u4fdd\u6301\u5bc4\u5b58\u5668\u90fd\u662f\"\u5b57\"\u503c\uff0c\u5728\u4e00\u6b21\u8bf7\u6c42\u4e2d\u53ef\u4ee5\u8bfb\u53d6\u6700\u591a 120 \u4e2a\u5b57\u7684\u6570\u636e\u30024\u8bfb\u53d6\u5355\u4e2a\/\u591a\u4e2a\u8f93\u5165\u5bc4\u5b58\u5668\u3002\u529f\u80fd 4 \u8fd4\u56de S7-200 \u7684\u6a21\u62df\u91cf\u6570\u636e\u503c\u30025\u5199\u5355\u4e2a\u7ebf\u5708\uff08\u79bb\u6563\u91cf\u8f93\u51fa\u70b9\uff09\u3002\u529f\u80fd 5 \u7528\u4e8e\u5c06\u79bb\u6563\u91cf\u8f93\u51fa\u70b9\u8bbe\u7f6e\u4e3a\u6307\u5b9a\u7684\u503c\u3002\u8fd9\u4e2a\u70b9\u4e0d\u662f\u88ab\u5f3a\u5236\u7684\uff0c\u7528\u6237\u7a0b\u5e8f\u53ef\u4ee5\u8986\u76d6 Modbus \u901a\u4fe1\u8bf7\u6c42\u5199\u5165\u7684\u503c\u30026\u5199\u5355\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u3002\u529f\u80fd 6 \u5199\u4e00\u4e2a\u503c\u5230 S7-200 \u7684 V \u5b58\u50a8\u533a\u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u4e2d\u300215\u5199\u591a\u4e2a\u7ebf\u5708\uff08\u79bb\u6563\u91cf\u8f93\u51fa\u70b9\uff09\u3002\u529f\u80fd 15 \u628a\u591a\u4e2a\u79bb\u6563\u91cf\u8f93\u51fa\u70b9\u7684\u503c\u5199\u5230 S7-200 \u7684\u8f93\u51fa\u6620\u50cf\u5bc4\u5b58\u5668\uff08Q \u533a\uff09\u3002\u8f93\u51fa\u70b9\u7684\u5730\u5740\u5fc5\u987b\u4ee5\u5b57\u8282\u8fb9\u754c\u8d77\u59cb\uff08\u5982 Q0.0 \u6216 Q2.0\uff09\uff0c\u5e76\u4e14\u8f93\u51fa\u70b9\u7684\u6570\u76ee\u5fc5\u987b\u662f 8 \u7684\u6574\u6570\u500d\u3002\u8fd9\u662f\u6b64 Modbus RTU \u4ece\u7ad9\u6307\u4ee4\u5e93\u7684\u9650\u5236\u3002\u4e9b\u70b9\u4e0d\u662f\u88ab\u5f3a\u5236\u7684\uff0c\u7528\u6237\u7a0b\u5e8f\u53ef\u4ee5\u8986\u76d6 Modbus \u901a\u4fe1\u8bf7\u6c42\u5199\u5165\u7684\u503c\u300216\u4e9b\u591a\u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\u3002\u529f\u80fd 16 \u5199\u591a\u4e2a\u503c\u5230 S7-200 \u7684 V \u5b58\u50a8\u533a\u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u4e2d\u3002\u5728\u4e00\u6b21\u8bf7\u6c42\u4e2d\u53ef\u4ee5\u5199\u6700\u591a 120 \u4e2a\u5b57\u7684\u6570\u636e\u3002\n\n### 2.5 Modbus RTU \u4ece\u7ad9\u4f8b\u7a0b\n\n[Modbus RTU \u4ece\u7ad9\u4f8b\u7a0b](http:\/\/www.ad.siemens.com.cn\/service\/article\/download\/Modbus_RTU_Slave_Sample.zip)\n\n\u9700\u8981 STEP 7-Micro\/WIN V4.0 SP3 \u4ee5\u4e0a\u7248\u6253\u5f00\n\n### 2.6 Modbus RTU \u4ece\u7ad9\u5e38\u89c1\u95ee\u9898\n\nModbus \u4ece\u7ad9\u7684\u7f51\u7edc\u5730\u5740\u4e0e S7-200 \u7684 CPU \u7f51\u7edc\u5730\u5740\u6709\u4ec0\u4e48\u5173\u7cfb\uff1f\n\n\u6ca1\u6709\u5173\u7cfb\u3002\u652f\u6301\u7f51\u7edc\u901a\u4fe1\u7684\u901a\u4fe1\u534f\u8bae\u5fc5\u987b\u6709\u5176\u81ea\u5df1\u7684\u7f51\u7edc\u5bfb\u5740\u89c4\u5b9a\u3002 Modbus \u4ece\u7ad9\u7684\u5730\u5740\u53ea\u662f\u5b83\u5728 Modbus \u7f51\u7edc\u4e0a\u7684\u5730\u5740\uff0c\u800c\u901a\u5e38\u6240\u8bf4\u7684 S7-200 CPU \u5730\u5740\u662f CPU \u5728\u897f\u95e8\u5b50\u7684 PPI \u7f51\u7edc\u4e0a\u7684\u7ad9\u5730\u5740\u3002S7-200 CPU \u7684\u5927\u90e8\u5206\u901a\u4fe1\u529f\u80fd\u90fd\u901a\u8fc7 PPI \u7f51\u7edc\u5b8c\u6210\uff0c\u4f8b\u5982\u7f16\u7a0b\u3001\u7f51\u7edc\u8bfb\u5199\u901a\u4fe1\u7b49\u3002\n\n \u5982\u4f55\u7406\u89e3 Modbus \u5730\u5740\u4e0e\u529f\u80fd\u7801\u7684\u533a\u522b\uff1f\n\nModbus \u5730\u5740\u4e0e Modbus \u7684\u529f\u80fd\u7801\u662f\u4e24\u4e2a\u5c42\u6b21\u7684\u6982\u5ff5\u3002\n\n\u6839\u636e Modbus \u901a\u4fe1\u534f\u8bae\uff0cModbus \u6570\u636e\u7684\u5730\u5740\u4f7f\u7528 00xxx\u300110xxx\u300130xxx \u548c 40xxx \u7684\u5f62\u5f0f\uff0c\u5206\u522b\u8868\u793a\u6570\u5b57\u91cf\u8f93\u51fa\u3001\u6570\u5b57\u91cf\u8f93\u5165\u3001\u6a21\u62df\u91cf\u8f93\u5165\u7b49\u6570\u636e\u5730\u5740\u3002\u5728\u4f7f\u7528 S7-200 \u7684\u6307\u4ee4\u5e93\u65f6\uff0cModbus \u6570\u636e\u5730\u5740\u4e0e S7-200 \u7684 I\/O \u548c\u6570\u636e\u5b58\u50a8\u533a\u5730\u5740\u95f4\u6709\u7279\u5b9a\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\n\n\u6709\u4e9b\u8bbe\u5907\u8868\u660e\u5b83\u652f\u6301 Modbus RTU \u901a\u4fe1\u534f\u8bae\uff0c\u4f46\u4e5f\u8be6\u7ec6\u63d0\u4f9b\u4e86\u8bfb\u5199\u6570\u636e\u7684\u8be6\u7ec6\u901a\u4fe1\u5e27\u683c\u5f0f\uff0c\u5176\u4e2d\u5305\u62ec\u5982\u4f55\u6307\u5b9a Modbus \u7ad9\u7684\u5730\u5740\uff0c\u9700\u8981\u8bfb\u5199\u6570\u636e\u7c7b\u578b\u3001\u957f\u5ea6\u7b49\u7b49\u3002\u6570\u636e\u5e27\u6709\u7279\u5b9a\u5b57\u8282\u6307\u51fa\u6b64\u6307\u4ee4\u8bfb\u5199\u7684\u6570\u636e\u7c7b\u578b\u548c\u5730\u5740\uff0c\u6b64\u5b57\u8282\u7684\u6570\u636e\u5185\u5bb9\u5373\u6240\u8c13\"\u529f\u80fd\u7801\"\uff0c\u5982\u529f\u80fd 1 \u6307\u5b9a\u8bfb\u53d6\u5355\u4e2a\/\u591a\u4e2a\u6570\u5b57\u91cf\u8f93\u51fa\u70b9\u7684\u503c\u3002\n\n\u652f\u6301 Modbus \u534f\u8bae\u7684\u8bbe\u5907\u6216\u8f6f\u4ef6\uff0c\u4f7f\u7528\u65f6\u7528\u6237\u76f4\u63a5\u8bbe\u7f6e\u6216\u770b\u5230\u7684\u5e94\u5f53\u662f Modbus \u6570\u636e\u5730\u5740\u3002Modbus \u5730\u5740\u6240\u8bbf\u95ee\u7684\u6570\u636e\uff0c\u662f\u901a\u8fc7\u5404\u79cd\"\u529f\u80fd\"\u8bfb\u5199\u800c\u6765\u3002\u529f\u80fd\u7801\u662f Modbus \u5730\u5740\u7684\u5e95\u5c42\u3002\u5982\u679c Modbus \u901a\u4fe1\u7684\u4e00\u65b9\u63d0\u4f9b\u7684\u6240\u8c13 Modbus \u534f\u8bae\u53ea\u6709\u529f\u80fd\u7801\uff0c\u5219\u9700\u8981\u6ce8\u610f\u4e86\u89e3\u6b64\u529f\u80fd\u53f7\u4e0e Modbus \u5730\u5740\u95f4\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\n\nModbus \u6307\u4ee4\u5e93\u542f\u52a8\u540e\uff0c\u5982\u4f55\u901a\u8fc7\u540c\u4e00\u4e2a\u901a\u4fe1\u7aef\u53e3\u8fdb\u884c CPU \u76d1\u63a7\uff1f\n\nModbus \u6307\u4ee4\u5e93\u4f7f\u7528\u7684\u662f CPU \u7684\u81ea\u7531\u53e3\u901a\u4fe1\u529f\u80fd\uff0c\u5de5\u4f5c\u5728\u81ea\u7531\u53e3\u6a21\u5f0f\u4e0b\u7684\u901a\u8baf\u53e3\u4e0d\u80fd\u4f7f\u7528 Micro\/WIN \u7684 PPI \u7f16\u7a0b\u901a\u4fe1\u76d1\u63a7\u3002\u5982\u679c\u901a\u4fe1\u53e3\u90fd\u5df2\u7ecf\u88ab\u5360\u7528\uff0c\u53ef\u4ee5\u8003\u8651\uff1a\n\n- \u52a0\u4e00\u4e2a\u901a\u4fe1\u6a21\u5757\uff08\u5982 EM 277\u3001CP 243-1\u3001EM 241 \u7b49\uff09\u6269\u5c55\u51fa\u4e00\u4e2a\u7f16\u7a0b\u901a\u4fe1\u53e3- \u4e2d\u6b62\u81ea\u7531\u53e3\u6a21\u5f0f\uff0c\u53ef\u4ee5\u5c06 CPU \u4e0a\u7684\u6a21\u5f0f\u5f00\u5173\u4ece RUN \u62e8\u5230 STOP\uff1b\u6216\u8005\u4fdd\u6301\u5904\u4e8e RUN \u72b6\u6001\uff0c\u7528\u7a0b\u5e8f\u505c\u6b62\u6307\u4ee4\u5e93\u7684 Modbus \u6a21\u5f0f\uff08\u53c2\u89c1\u6307\u4ee4\u5e93\u5e94\u7528\uff09\n\n\u4e3a\u4f55\u6709\u4e9b HMI \u8f6f\u4ef6\u4f7f\u7528 Modbus RTU \u8bfb\u53d6S7-200\u4e2d\u7684\u5b9e\u6570\u4f1a\u51fa\u73b0\u9519\u8bef\uff1f\n\n\u6709\u4e9bHMI\u8f6f\u4ef6\u4f7f\u7528Modbus RTU\u901a\u4fe1\u534f\u8bae\u65f6\uff0c\u5904\u7406\u5b58\u50a8\u5728\u6570\u636e\u4fdd\u6301\u5bc4\u5b58\u5668\u4e2d\u7684\u5b9e\u6570\uff08\u6d6e\u70b9\u6570\uff09\u7684\u65b9\u5f0f\u4e0e\u897f\u95e8\u5b50\u7684\u5b9e\u6570\u4fdd\u5b58\u683c\u5f0f\u4e0d\u540c\u3002\u897f\u95e8\u5b50\u7684PLC\u9075\u5faa\"\u9ad8\u5b57\u8282\u4f4e\u5730\u5740\u3001\u4f4e\u5b57\u8282\u9ad8\u5730\u5740\"\u7684\u89c4\u5f8b\u3002\n\nModbus RTU\u7684\u4fdd\u6301\u5bc4\u5b58\u5668\u603b\u662f\u4ee5\"\u5b57\uff08\u53cc\u5b57\u8282\uff09\"\u4e3a\u5355\u4f4d\uff0c\u800c\u4e00\u4e2a\u5b9e\u6570\u9700\u89814\u4e2a\u5b57\u8282\uff08\u53cc\u5b57\uff09\u8868\u793a\u3002HMI\u8f6f\u4ef6\u5728\u5904\u7406\u65f6\u53ef\u80fd\u4f1a\u628a\u4fdd\u6301\u5bc4\u5b58\u5668\u7684\u4e24\u4e2a\"\u5b57\"\u4e92\u6362\u4f4d\u7f6e\uff0c\u9020\u6210\u4e0d\u80fd\u8bc6\u522b\u4ee5\u897f\u95e8\u5b50\u683c\u5f0f\u8868\u793a\u7684\u5b9e\u6570\u3002\u5982\u679cHMI\u8f6f\u4ef6\u4e00\u65b9\u65e0\u6cd5\u5904\u7406\u8fd9\u79cd\u5b9e\u6570\uff0c\u5219\u53ef\u5728S7-200 CPU\u4e2d\u7f16\u7a0b\u5c06\u5b58\u5165\u6570\u636e\u7f13\u51b2\u533a\uff08\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\uff09\u7684\u5b9e\u6570\u7684\u9ad8\u5b57\u548c\u4f4e\u5b57\u4e92\u6362\u3002\n\n\u4e3a\u4f55\u6709\u7684HMI\u8f6f\u4ef6\u7528Modbus RTU\u53ef\u4ee5\u8bfb\u53d6\u4f5c\u4e3a\u4ece\u7ad9\u7684S7-200\u7684\u5185\u5bb9\uff0c\u4f46\u4e0d\u80fd\u5199\u5165\uff1f\n\n\u53ef\u80fd\u6b64\u8f6f\u4ef6\u4f7f\u7528\u4e86Modbus\u529f\u80fd15\uff08\u5199\u591a\u4e2a\u79bb\u6563\u91cf\uff09\u6216\u7c7b\u4f3c\u529f\u80fd\uff08\u529f\u80fd 16\uff09\u3002S7-200\u4ece\u7ad9\u534f\u8bae\u9075\u5b88\"\u4ee5\u6574\u5b57\u8282\u5730\u5740\u8fb9\u754c\uff08\u5982Q0.0\u3001Q2.0\uff09\u5f00\u59cb\u3001\u4ee58\u7684\u6574\u6570\u500d\u4e3a\u4f4d\u4e2a\u6570\"\u7684\u89c4\u7ea6\u3002\u5982\u679cHMI\u8f6f\u4ef6\u672a\u4e25\u683c\u6267\u884c\u6b64\u89c4\u5f8b\u5c31\u53ef\u80fd\u53d1\u751f\u5199\u5165\u9519\u8bef\u7684\u60c5\u51b5\u3002\n\nS7-200\u662f\u5426\u652f\u6301 Modbus ASCII \u6a21\u5f0f\uff1f\n\nS7-200\u53ef\u4ee5\u652f\u6301\u4e0a\u8ff0\u6a21\u5f0f\uff0c\u4f46\u662f\u6ca1\u6709\u73b0\u6210\u7684\u6307\u4ee4\u5e93\uff0c\u9700\u8981\u7528\u6237\u81ea\u5df1\u7f16\u7a0b\u3002\n\n\u9879\u76ee\u7f16\u8bd1\u540e\u4e3a\u4f55\u51fa\u73b0\u5f88\u591a\u9519\u8bef\uff1f\n\n\u4f7f\u7528\u6307\u4ee4\u5e93\u65f6\uff0c\u82e5\u7f16\u8bd1\u540e\u51fa\u73b0\u5f88\u591a\u9519\u8bef\uff0c\u4e00\u822c\u662f\u56e0\u4e3a\u672a\u6307\u5b9a\u5e93\u6307\u4ee4\u6570\u636e\u5b58\u50a8\u533a\u3002\u8bf7\u53c2\u8003[\u76f8\u5173\u6761\u76ee](http:\/\/www.ad.siemens.com.cn\/service\/article\/s7-200\/s7-200modbus\/default.aspx#librarymemory)\u3002\n\nS7-200 CPU\u7684Port1\u662f\u5426\u53ef\u4ee5\u652f\u6301Modbus RTU\u534f\u8bae\uff1f\n\n\u53ef\u4ee5\u3002\u7528\u6237\u53ef\u4ee5\u81ea\u5df1\u7f16\u7a0b\u5b9e\u73b0\u3002\n\n\u5728S7-200\u7684\"Tips and Tricks\"\u5e2e\u52a9\u6587\u6863\u4e2d\uff0cTip041\u662fModbus RTU\u4ece\u7ad9\u7a0b\u5e8f\uff0c\u7528\u6237\u53ef\u4ee5\u53c2\u8003\u3002\n\nS7-200\u662f\u5426\u53ef\u4ee5\u7ec4\u6210Modbus RTU\u901a\u4fe1\u7f51\u7edc\uff1f\u5982\u4f55\u7ec4\u7f51\uff1f\n\nS7-200\u53ef\u4ee5\u7ec4\u6210RS-485\u57fa\u7840\u4e0a\u7684Modbus RTU\u7f51\u7edc\u3002\u5982\u679c\u901a\u4fe1\u5bf9\u8c61\u662f\u4e0d\u540c\u6807\u51c6\u7684\u901a\u4fe1\u53e3\uff0c\u53ef\u80fd\u8fd8\u9700\u8981\u8f6c\u6362\u3002\n\u53c2\u89c1\uff1a[RS-485\u7f51\u7edc\u7ec4\u6210](http:\/\/www.ad.siemens.com.cn\/service\/article\/s7-200\/s7-200modbus\/default.aspx#Rs485hardware)\n\n3STEP 7-Micro\/WIN \u7684\u6807\u51c6\u6307\u4ee4\u5e93\n\nSTEP 7-Micro\/WIN V4.0 \u4ee5\u4e0a\u7248\u5185\u90e8\u5df2\u7ecf\u5e26\u6709\u65b0\u7684\u6307\u4ee4\u5e93\uff0c\u4f46\u5728\u672a\u5b89\u88c5\u897f\u95e8\u5b50 Instruction Library \u8f6f\u4ef6\u5305\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0d\u80fd\u663e\u793a\u51fa\u6765\u4f7f\u7528\u3002\n\n\u8981\u4f7f\u7528\u897f\u95e8\u5b50\u7684\u6807\u51c6\u6307\u4ee4\u5e93\uff0c\u5fc5\u987b\u5148\u5b89\u88c5\u897f\u95e8\u5b50\u7684\u6307\u4ee4\u5e93\u8f6f\u4ef6\u5305 Instruction Library\u3002\u5b89\u88c5\u4e86 Instruction Library \u4e4b\u540e\uff0c\u53ea\u8981\u5b89\u88c5\u7684 STEP 7-Micro\/WIN \u7248\u672c\u662f\u6700\u65b0\u7684\uff0c\u5c31\u80fd\u83b7\u5f97\u76f8\u5e94\u7248\u672c\u7684\u65b0\u6307\u4ee4\u5e93\u3002\u5b89\u88c5 Micro\/WIN \u7684\u5347\u7ea7\u5305\uff08Service Pack\uff09\u4e5f\u4f1a\u66f4\u65b0\u6307\u4ee4\u5e93\u7684\u7248\u672c\u3002\n\n\u7528\u6237\u53ef\u4ee5\u76f4\u63a5\u4ece\u4e0b\u9762\u83b7\u5f97\u897f\u95e8\u5b50 Instruction Library \u8f6f\u4ef6\u5b89\u88c5\u5305\uff1a\n\n[Instruction Library](http:\/\/www.ad.siemens.com.cn\/service\/article\/download\/InstructionLibrary.zip)\n\n\u6700\u65b0\u7684 STEP 7-Micro\/WIN V4.0 SP5 \u7248\u672c\u652f\u6301\u4ee5\u4e0b\u51e0\u79cd\u897f\u95e8\u5b50\u6807\u51c6\u6307\u4ee4\u5e93\uff1a\n\n- USS\u901a\u4fe1\u534f\u8bae\u5e93\uff1a\n\u53ef\u4f7fCPU\u901a\u4fe1\u53e3 Port0 \u548c Port 1 \u652f\u6301\u4e0eMicro-Master 3\uff08MM3\u7cfb\u5217\uff09\u548cMicro-Master 4\uff08MM4\u7cfb\u5217\uff0c\u5982MM420\u3001MM430\u3001MM440\u7b49\uff09\u3001SINAMICS G110\u7cfb\u5217\u7684USS\u901a\u4fe1\u63a7\u5236\uff0c\u901a\u8fc7\u4e00\u4e9b\u9884\u5148\u7f16\u597d\u7684\u5b50\u7a0b\u5e8f\u548c\u4e2d\u65ad\u7a0b\u5e8f\uff0c\u4ee5\u65b9\u4fbf\u5730\u63a7\u5236\u53d8\u9891\u5668\u7684\u8fd0\u884c\u548c\u8bfb\u5199\u5176\u53c2\u6570\u3002\nMicro\/WIN V4.0\u7684USS\u6307\u4ee4\u5e93\u73b0\u5728\u5df2\u7ecf\u9488\u5bf9\u897f\u95e8\u5b50\u7684Master Drive\u505a\u4e86\u4f18\u5316\u3002- [Modbus RTU Slave\uff08\u4ece\u7ad9\uff09\u901a\u4fe1\u534f\u8bae\u5e93\uff1a](http:\/\/www.ad.siemens.com.cn\/service\/article\/s7-200\/s7-200modbus\/default.aspx#slave)\n\u53ef\u4f7fCPU\u901a\u4fe1\u53e3 Port0 \u652f\u6301Modbus RTU\u4ece\u7ad9\u901a\u4fe1\u529f\u80fd\u3002- [Modbus RTU Master \uff08\u4e3b\u7ad9\uff09\u901a\u4fe1\u534f\u8bae\u5e93:](http:\/\/www.ad.siemens.com.cn\/service\/article\/s7-200\/s7-200modbus\/default.aspx#master)\n\u53ef\u4f7f CPU \u901a\u4fe1\u53e3 Port 0 \u548c Port 1 \u652f\u6301 Modbus RTU \u4e3b\u7ad9\u901a\u4fe1\u529f\u80fd\u3002\n\n\u4ee5\u4e0a\u901a\u4fe1\u534f\u8bae\u5e93\u90fd\u662f\u4f7f\u7528\u4e86S7-200 CPU\u7684\u81ea\u7531\u53e3\u901a\u4fe1\u529f\u80fd\u3002\n\n\u56fe1. \u897f\u95e8\u5b50\u6807\u51c6\u5e93\u4ee5\u6d45\u84dd\u8272\u56fe\u6807\u8868\u793a\uff08Micro\/WIN V4.0 SP5\uff09\n\n\u4ece\u4ee5\u4e0b\u4e24\u79cd\u9014\u5f84\u53ef\u4ee5\u83b7\u5f97STEP 7-Micro\/WIN\u6307\u4ee4\u5e93\uff1a\n\n- \u5b89\u88c5STEP 7-Micro\/WIN32 \u9644\u52a0\u8f6f\u4ef6\u5305Instruction Library V1.1\uff0c\u8ba2\u8d27\u53f76ES7830-2BC00-0YX0\u3002- \u5df2\u5b89\u88c5STEP 7-Micro\/WIN32 V3.1\u548cToolbox V1.0\uff08\u5305\u62ec\u4e3aTP070\u914d\u7f6e\u7684TP Designer\u548c\u8001\u7684\u6307\u4ee4\u5e93\uff0c\u8ba2\u8d27\u53f76ES7810-2TC00-0YX0\uff09\uff0c\u518d\u5b89\u88c5\u6b63\u5f0f\u7684STEP 7-Micro\/WIN32 V3.2\uff08\u6216V4.0\uff09\u7248\uff0c\u4e5f\u53ef\u81ea\u52a8\u83b7\u5f97\u65b0\u7684\u6307\u4ee4\u5e93\u3002\u65b0\u65e7\u7248\u672c\u7684\u8f6f\u4ef6\u53ca\u5176\u6307\u4ee4\u5e93\u53ef\u4ee5\u5728\u4e00\u53f0\u8ba1\u7b97\u673a\u4e0a\u5171\u5b58\uff08V4.0 \u7684\u5404\u5347\u7ea7\u5305\u4e0d\u80fd\u5171\u5b58\uff09\u3002\n\n**\u6ce8\u610f\uff1a**\n\n- \u6240\u6709\u65e7\u7684CPU21x\u4e0d\u80fd\u4f7f\u7528\u65b0\u7684\u6307\u4ee4\u5e93- \u65e7\u7248\u672c\u7684\u6307\u4ee4\u5e93\u4e0d\u80fd\u4e0e\u65b0\u7684\u6307\u4ee4\u5e93\u5728\u540c\u4e00\u4e2a\u9879\u76ee\u6587\u4ef6\u4e2d\u5171\u5b58- \u5b89\u88c5\u4e86\u65b0\u7248\u672c\u7684\u6307\u4ee4\u5e93\u540e\uff0c\u65e7\u7248\u672c\u7684\u6307\u4ee4\u5e93\u4e0d\u518d\u80fd\u591f\u770b\u5230- \u7528\u6237\u81ea\u5b9a\u4e49\u7684\u6307\u4ee4\u5e93\u4e0d\u80fd\u4e0e\u897f\u95e8\u5b50\u7684\u5e93\u91cd\u540d\n\n\u6709\u65f6\u56e0\u4e3a\u7cfb\u7edf\u548c\u8f6f\u4ef6\u5b89\u88c5\u6709\u95ee\u9898\uff0c\u53ef\u80fd\u5728\u5b89\u88c5\u5b8c\u897f\u95e8\u5b50\u6807\u51c6\u6307\u4ee4\u5e93\u540e\u4ecd\u7136\u4e0d\u80fd\u770b\u5230\u897f\u95e8\u5b50\u6807\u51c6\u5e93\u3002\u8fd9\u65f6\u53ef\u4ee5\u5c1d\u8bd5\u6dfb\u52a0\u6807\u51c6\u5e93\u3002\u6807\u51c6\u5e93\u7684\u6587\u4ef6\u5b58\u5728Micro\/WIN\u5b89\u88c5\u76ee\u5f55\u4e0b\u7684Standard Libs\u76ee\u5f55\u4e0b\u3002\n\n### 3.1 \u5206\u914d\u5e93\u6307\u4ee4\u6570\u636e\u533a\n\n\u8c03\u7528STEP 7 - Mciro\/WIN32 V3.2 Instruction Library\uff08\u6307\u4ee4\u5e93\uff09\u9700\u8981\u5206\u914d\u5e93\u6307\u4ee4\u6570\u636e\u533a\uff08Library Memory\uff09\u3002\u5e93\u6307\u4ee4\u6570\u636e\u533a\u662f\u76f8\u5e94\u5e93\u7684\u5b50\u7a0b\u5e8f\u548c\u4e2d\u65ad\u7a0b\u5e8f\u6240\u8981\u7528\u5230\u7684\u53d8\u91cf\u5b58\u50a8\u7a7a\u95f4\u3002\n\n\u5982\u679c\u5728\u7f16\u7a0b\u65f6\u4e0d\u5206\u914d\u5e93\u6307\u4ee4\u6570\u636e\u533a\uff0c\u7f16\u8bd1\u65f6\u4f1a\u4ea7\u751f\u8bb8\u591a\u76f8\u540c\u7684\u9519\u8bef\uff08\u9519\u8bef18\uff09\u3002\n\n\u64cd\u4f5c\u6b65\u9aa4\uff08\u4ee5Modbus RTU\u5e93\u6307\u4ee4\u4e3a\u4f8b\uff09\uff1a\n\n\u5728\u6307\u4ee4\u6811\u7684Project\uff08\u9879\u76ee\uff09\u4e2d\uff0c\u4ee5\u9f20\u6807\u53f3\u952e\u5355\u51fbProgram Block\uff08\u7a0b\u5e8f\u5757\uff09\uff0c\u5728\u5f39\u51fa\u7684\u5feb\u6377\u83dc\u5355\u4e2d\u9009\u62e9Library Memory\u3002\u5982\u56fe2\u6240\u793a\uff1a\n\n\u56fe2\n\n\u5728\u5f39\u51fa\u7684\u9009\u9879\u5361\u4e2d\u8bbe\u7f6e\u5e93\u6307\u4ee4\u6570\u636e\u533a\uff0c\u5982\u56fe2\u6240\u793a\uff1a\n\n\u56fe3.\u7f3a\u7701\u60c5\u51b5\u4e0b\u662f\u4eceVB0\u5f00\u59cb\uff0c\u4f46\u56e0\u4e3a\u4e0eModbus\u7684\u4fdd\u6301\u5bc4\u5b58\u533a\u51b2\u7a81\uff0c\u6240\u4ee5\u624b\u52a8\u6539\u4e3aVB2000\u3002\u6309\"Suggest Address\"\u6309\u94ae\u4e5f\u53ef\u4ee5\u81ea\u52a8\u5206\u914d\u3002\n\n\u53ef\u4ee5\u4f7f\u7528Suggest Address\uff08\u63a8\u8350\u5730\u5740\uff09\u8bbe\u7f6e\u6570\u636e\u533a\uff0c\u4f46\u8981\u6ce8\u610f\u7f16\u7a0b\u8f6f\u4ef6\u8bbe\u7f6e\u7684\u6570\u636e\u533a\u5730\u5740\uff0c\u53ea\u8003\u8651\u5230\u4e86\u5176\u4ed6\u4e00\u822c\u5bfb\u5740\uff0c\u800c\u672a\u8003\u8651\u5230\u8bf8\u5982Modbus\u6570\u636e\u4fdd\u6301\u5bc4\u5b58\u5668\u533a\u7b49\u7684\u8bbe\u7f6e\u3002\u5e94\u5f53\u786e\u4fdd\u4e0d\u4e0e\u5176\u4ed6\u4efb\u4f55\u5df2\u4f7f\u7528\u7684\u6570\u636e\u533a\u91cd\u53e0\u3001\u51b2\u7a81\u3002\u4e0d\u5e94\u91cd\u590d\u6309Suggest Address\u6309\u94ae\uff0c\u5426\u5219\u4e5f\u4f1a\u9020\u6210\u6df7\u4e71\u3002\n\n\u5728STEP 7-Micro\/WIN32 V3.1\u4e2d\uff0c\u6709\u5206\u914d\u5e93\u6307\u4ee4\u6570\u636e\u533a\u65f6\u6709\u4e0d\u540c\u7684\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9700\u8981\u5728Symbol Table\uff08\u7b26\u53f7\u8868\uff09\u4e2d\u8bbe\u7f6e\u4e00\u4e2a\u9996\u5730\u5740\u3002\u6211\u4eec\u5f3a\u70c8\u5efa\u8bae\u4f7f\u7528\u5f53\u65f6\u6700\u65b0\u7684\u7f16\u7a0b\u7248\u672c\u3002\n\n### 3.2 \u6dfb\u52a0\u6307\u4ee4\u5e93\n\n**\u6ce8\u610f\uff1a**\u6dfb\u52a0\u81ea\u5b9a\u4e49\u6307\u4ee4\u5e93\uff0c\u9700\u8981\u5173\u95ed\u7f16\u8f91\u5e93\u6307\u4ee4\u7684\u9879\u76ee\uff0c\u65b0\u5efa\u7acb\u4e00\u4e2a\u9879\u76ee\u3002\u5982\u679c\u8981\u6dfb\u52a0\u5176\u4ed6\u6765\u6e90\u7684\u5e93\u6307\u4ee4\u81ea\u7136\u4e0d\u9700\u8981\u5982\u6b64\u3002\n\n**\u7b2c\u4e00\u6b65\uff1a**\u5728Micro\/WIN\u7684File\uff08\u6587\u4ef6\uff09\u83dc\u5355\u4e2d\u9009\u62e9Add\/Remove Libraries...\uff08\u6dfb\u52a0\/\u5220\u9664\u6307\u4ee4\u5e93\uff09\u547d\u4ee4 \uff1b\u6216\u8005\u5728\u6307\u4ee4\u6811\u7684Libraries\uff08\u6307\u4ee4\u5e93\uff09\u5206\u652f\u4e0a\u5355\u51fb\u9f20\u6807\u53f3\u952e\uff0c\u9009\u62e9Add\/Remove Libraries...\n\n\u56fe4. \u9009\u62e9\u6dfb\u52a0\/\u5220\u9664\u6307\u4ee4\u5e93\u547d\u4ee4\n\n\u6dfb\u52a0\/\u5220\u9664\u5bf9\u8bdd\u6846\u4e2d\u5c06\u663e\u793a\u5df2\u7ecf\u5728\u672c\u673a\u7684Micro\/WIN\u4e2d\u96c6\u6210\u7684\u7528\u6237\u81ea\u5b9a\u4e49\u6307\u4ee4\u5e93\u3002\n\n\u56fe5. \u5df2\u5b89\u88c5\u7684\u5e93\u6307\u4ee4\n\n**\u7b2c\u4e8c\u6b65\uff1a**\u6309Add\uff08\u6dfb\u52a0\uff09\u6309\u94ae\uff0c\u9009\u62e9\u65b0\u5b9a\u4e49\u7684\u5e93\u6587\u4ef6\u8def\u5f84\u3002\u7528\u6237\u81ea\u5b9a\u4e49\u5e93\u5c06\u81ea\u52a8\u6dfb\u52a0\u5230Micro\/WIN\u6307\u4ee4\u6811\u7684Libraries\u5206\u652f\u4e0b\u3002\n\n\u56fe6. \u9009\u62e9\u5e93\u6587\u4ef6\n\n \u7f3a\u7701\u60c5\u51b5\u4e0b\uff0cMicro\/WIN\u5230\u56fe8\u4e2d\u7684\u8def\u5f84\u4e0b\u5bfb\u627e\u5e93\u6307\u4ee4\u6587\u4ef6\u3002\u7528\u6237\u4e5f\u53ef\u4ee5\u6307\u5b9a\u5176\u4ed6\u8def\u5f84\u3002\u4f46\u8981\u6ce8\u610f\u5e93\u6587\u4ef6\u5e94\u5f53\u4fdd\u6301\u5728\u975e\u79fb\u52a8\u7684\u4ecb\u8d28\u4e0a\uff0c\u5982\u679c\u6307\u5b9a\u4e86\u4e00\u4e2a\u53ef\u79fb\u52a8\u786c\u76d8\uff0c\u5219\u786c\u76d8\u4e0d\u5728\u65f6\u4f1a\u53d1\u751f\u627e\u4e0d\u5230\u5e93\u7684\u9519\u8bef\u3002\u5efa\u8bae\u7528\u6237\u4f7f\u7528\u7f3a\u7701\u8bbe\u7f6e\u3002\n\n### 3.3 \u5220\u9664\u5e93\u6307\u4ee4\n\n**\u7b2c\u4e00\u6b65\uff1a**\u9009\u62e9\u6dfb\u52a0\/\u5220\u9664\u6307\u4ee4\u5e93\u547d\u4ee4\n\n\u56fe7. \u9009\u62e9\u547d\u4ee4\n\n**\u7b2c\u4e8c\u6b65\uff1a**\u9009\u4e2d\u987b\u5378\u8f7d\u7684\u5e93\u6240\u5bf9\u5e94\u7684\u5e93\u6587\u4ef6\uff0c\u6309Remove\uff08\u5220\u9664\uff09\u6309\u94ae\n\n\u56fe8. \u9009\u4e2d\u8981\u5220\u9664\u7684\u5e93\u6307\u4ee4\u6587\u4ef6\n\n4RS-485\u7f51\u7edc\n\nS7-200\u7cfb\u7edf\u652f\u6301\u7684PPI\u3001MPI\u548cPROFIBUS-DP\u534f\u8bae\u901a\u5e38\u4ee5RS-485\u7535\u6c14\u7f51\u7edc\u4e3a\u786c\u4ef6\u57fa\u7840\u3002\nRS-485\u4e32\u884c\u901a\u4fe1\u6807\u51c6\u91c7\u7528\u5e73\u8861\u4fe1\u53f7\u4f20\u8f93\u65b9\u5f0f\uff0c\u6216\u8005\u79f0\u4e3a\u5dee\u52a8\u6a21\u5f0f\u3002\u5e73\u8861\u4f20\u8f93\u65b9\u5f0f\u53ef\u4ee5\u6709\u6548\u5730\u6291\u5236\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u5e72\u6270\u3002\n\u5e73\u8861\u65b9\u5f0f\u91c7\u7528\u4e00\u5bf9\u5bfc\u7ebf\uff0c\u5229\u7528\u4e24\u6839\u5bfc\u7ebf\u95f4\u7684\u7535\u538b\u5dee\u4f20\u8f93\u4f20\u8f93\u4fe1\u53f7\u3002\u8fd9\u4e24\u6839\u5bfc\u7ebf\u88ab\u547d\u540d\u4e3aA\uff08TxD\/RxD-\uff09\u548cB\uff08TxD\/RxD+\uff09\u3002\u5f53B\u7684\u7535\u538b\u6bd4A\u9ad8\u65f6\uff0c\u8ba4\u4e3a\u4f20\u8f93\u7684\u662f\u903b\u8f91\"\u9ad8\"\u7535\u5e73\uff1b\u5f53B\u7684\u7535\u538b\u6bd4A\u4f4e\u65f6\uff0c\u8ba4\u4e3a\u4f20\u8f93\u7684\u662f\u903b\u8f91\"\u4f4e\"\u7535\u5e73\u4fe1\u53f7\u3002\u80fd\u591f\u6709\u6548\u5de5\u4f5c\u7684\u5dee\u52a8\u7535\u538b\u8303\u56f4\u5341\u5206\u5bbd\u5e7f\uff0c\u53ef\u4ee5\u4ece\u96f6\u70b9\u51e0\u4f0f\u5230\u63a5\u8fd1\u5341\u4f0f\u3002\nRS-485\u901a\u4fe1\u7aef\u53e3\u53ef\u4ee5\u505a\u5230\u5f88\u9ad8\u7684\u901a\u4fe1\u901f\u7387\uff0c\u8f83\u957f\u7684\u901a\u4fe1\u8ddd\u79bb\uff0c\u4ee5\u53ca\u5e76\u8054\u8fde\u63a5\u591a\u4e2a\u7aef\u53e3\u3002\n\n\u5e73\u8861\u901a\u4fe1\u65b9\u5f0f\u80fd\u5426\u6709\u6548\u5de5\u4f5c\u53d7\u5230\u5171\u6a21\u7535\u538b\u5dee\u7684\u5f71\u54cd\u3002RS-485\u63a5\u53e3\u7684\u4e24\u6839\u5bfc\u7ebf\u76f8\u5bf9\u4e8e\u901a\u4fe1\u5bf9\u8c61\u4fe1\u53f7\u5730\u7684\u7535\u538b\u5dee\u5c31\u662f\u5171\u6a21\u7535\u538b\u3002\u975e\u7535\u6c14\u9694\u79bb\u7684RS-485\u63a5\u53e3\u80fd\u5728\u4e00\u5b9a\u7684\u8303\u56f4\u5185\u62b5\u6297\u5171\u6a21\u7535\u538b\u5bf9\u901a\u4fe1\u7684\u5e72\u6270\u3002\n\nS7-200 CPU\u901a\u4fe1\u53e3\u7684\u5171\u6a21\u6291\u5236\u7535\u538b\u662f12V\u3002\u6240\u4ee5\u5bf9\u4e8e\u8fd9\u7c7b\u975e\u9694\u79bb\u578b\u7684RS-485\u7aef\u53e3\uff0c\u4fdd\u8bc1\u901a\u4fe1\u53e3\u4e4b\u95f4\u7684\u4fe1\u53f7\u5730\u7b49\u7535\u4f4d\u975e\u5e38\u91cd\u8981\uff0c\u6700\u597d\u5c06\u5b83\u4eec\u8fde\u63a5\u5728\u4e00\u8d77\uff08\u5e76\u4e0d\u662f\u8bf4\u4e00\u5b9a\u8981\u63a5\u5730\uff09\u3002\n\nS7-200\u7cfb\u7edf\u4e2d\u7684RS-485\u7aef\u53e3\u662f\u534a\u53cc\u5de5\u7684\uff0c\u4e0d\u80fd\u540c\u65f6\u53d1\u9001\u548c\u63a5\u6536\u4fe1\u53f7\u3002\n\u5728S7-200\u7cfb\u7edf\u4e2d\uff0c\u9009\u62e9\u5408\u9002\u7684\u901a\u4fe1\u8bbe\u5907\uff0c\u53ef\u4ee5\u505a\u5230\u6ce2\u7279\u7387\u4ece1200\u523012M\uff0c\u5355\u6bb5\u8ddd\u79bb1000m\uff0c\u5355\u6bb5\u7ad9\u70b932\u4e2a\u7684\u901a\u4fe1\u7f51\u7edc\u3002\u901a\u8fc7\u4e2d\u7ee7\u5668\uff0cRS-485\u7535\u6c14\u7f51\u7edc\u8fd8\u53ef\u4ee5\u6269\u5c55\u901a\u4fe1\u8ddd\u79bb\uff0c\u589e\u52a0\u901a\u4fe1\u7ad9\u70b9\u3002\u8be6\u60c5\u8bf7\u53c2\u8003\u300aS7-200\u7cfb\u7edf\u624b\u518c\u300b\u5173\u4e8e\u901a\u4fe1\u7684\u4e13\u95e8\u4e00\u7ae0\u3002\n\u867d\u7136\u5e38\u89c1\u7684RS-485\u901a\u4fe1\u5668\u4ef6\u5728\u7535\u6c14\u6027\u80fd\u4e0a\u57fa\u672c\u4e00\u81f4\uff0c\u4f46\u7269\u7406\u63a5\u53e3\u5374\u4e94\u82b1\u516b\u95e8\uff0c\u6ca1\u6709\u7edf\u4e00\u7684\u89c4\u5b9a\u3002\n\n \u897f\u95e8\u5b50\u7cfb\u7edf\u4e2d\u7684 D-Sub 9 \u9488\u578b RS-485 \u7aef\u53e3\uff0c\u5f15\u811a\u5b9a\u4e49\u662f\u57fa\u672c\u4e00\u81f4\u7684\u3002\n\n### 4.1 S7-200\u7cfb\u7edf\u4e2d\u7684RS-485\u901a\u4fe1\n\n\u5728S7-200\u7cfb\u7edf\u4e2d\uff0cCPU\u4e0a\u7684\u901a\u4fe1\u53e3\uff08\u7f16\u7a0b\u53e3\uff09\uff0c\u4ee5\u53caEM277\u6a21\u5757\u4e0a\u7684\u901a\u4fe1\u7aef\u53e3\u90fd\u662f\u7b26\u5408RS-485\u7535\u6c14\u6807\u51c6\u7684\u3002\u4f46\u5b83\u4eec\u4e5f\u6709\u6240\u4e0d\u540c\uff1a\n\n- S7-200 CPU\u4e0a\u7684\u901a\u4fe1\u53e3\u662f\u975e\u9694\u79bb\u578b\u7684\uff0c\u6700\u9ad8\u901a\u4fe1\u901f\u7387187.5K\u6ce2\u7279- EM277\u4e0a\u7684\u901a\u4fe1\u53e3\u662f\u9694\u79bb\u7684\uff0c\u6700\u9ad8\u901a\u4fe1\u901f\u738712M\uff0c\u5e76\u4e14\u901f\u7387\u81ea\u9002\u5e94\n\n\u4ee5\u4e0b\u4e09\u79cd\u534f\u8bae\uff0c\u90fd\u53ef\u4ee5\u5728RS-485\u7684\u786c\u4ef6\u57fa\u7840\u4e0a\u5b9e\u73b0\u901a\u4fe1\uff1a\n\n- PPI\uff08\u5305\u62ec\u7f16\u7a0b\u901a\u4fe1\u3001S7-200 CPU\u4e4b\u95f4\u3001S7-200 CPU\u4e0eHMI\u4e4b\u95f4\u7684\u901a\u4fe1\u7b49\uff09- MPI\uff08S7-200 CPU\u4e0eS7-300\/400 CPU\u3001S7-200 CPU\u4e0eHMI\u4e4b\u95f4\u3001EM277\u4e0eHMI\u4e4b\u95f4\u7684\u901a\u4fe1\u7b49\uff09- PROFIBUS-DP\uff08EM277\u4e0e\u5176\u4ed6PROFIBUS-DP\u4e3b\u7ad9\u4e4b\u95f4\u7684\u901a\u4fe1\uff09\n\n\u5b9e\u9645\u4e0a\uff0c\u5982\u679c\u5404\u901a\u4fe1\u7ad9\u70b9\u7684\u5730\u5740\u4e0d\u540c\uff0c\u901a\u4fe1\u6ce2\u7279\u7387\u76f8\u540c\uff0c\u4e0a\u8ff0\u4e09\u4e2a\u534f\u8bae\u53ef\u4ee5\u5728\u4e00\u4e2aRS-485\u7f51\u7edc\u4e0a\u540c\u65f6\u5b9e\u73b0\u5404\u81ea\u7684\u901a\u4fe1\u3002\u5f53\u7136\uff0c\u4e00\u4e2a\u7ad9\u70b9\u652f\u6301\u4ec0\u4e48\u534f\u8bae\u53d7\u5230\u81ea\u8eab\u6761\u4ef6\u6240\u9650\u3002\n\n\u56e0\u6b64\u8003\u5bdf\u4e0a\u8ff0\u7535\u6c14\u7f51\u7edc\u7684\u901a\u4fe1\u65f6\uff0c\u6211\u4eec\u5e94\u6ce8\u610f\u5230\u5b83\u4eec\u90fd\u53d7RS-485\u7f51\u7edc\u7535\u6c14\u57fa\u7840\u7684\u5236\u7ea6\u3002\u4e0a\u8ff0\u7f51\u7edc\u6240\u7528\u7684\u7f51\u7edc\u786c\u4ef6\u57fa\u672c\u4e00\u6837\u3002\n\n5RS-485\u7f51\u7edc\u7684\u786c\u4ef6\u7ec4\u6210\n\n\u5728S7-200\u7cfb\u7edf\u4e2d\uff0c\u65e0\u8bba\u662f\u7ec4\u6210PPI\u3001MPI\u8fd8\u662fRPOFIBUS-DP\u7f51\u7edc\uff0c\u6216\u662fModbus RTU\u7f51\u7edc\uff0c\u7528\u5230\u7684\u4e3b\u8981\u90e8\u4ef6\u90fd\u662f\u4e00\u6837\u7684\uff1a\n\n- PROFIBUS\u7535\u7f06\uff1a\u7535\u7f06\u578b\u53f7\u6709\u591a\u79cd\uff0c\u5176\u4e2d\u6700\u57fa\u672c\u7684\u662fPROFIBUS FC\uff08Fast Connect\u5feb\u901f\u8fde\u63a5\uff09Standard\u7535\u7f06\uff08\u8ba2\u8d27\u53f76XV1 830-0EH10\uff09- PROFIBUS\u7f51\u7edc\u8fde\u63a5\u5668\uff1a\u7f51\u7edc\u8fde\u63a5\u5668\u4e5f\u6709\u591a\u79cd\u5f62\u5f0f\uff0c\u5982\u51fa\u7ebf\u89d2\u5ea6\u4e0d\u540c\u7b49\u7b49\n\n### 5.1 \u8fde\u63a5\u7f51\u7edc\u8fde\u63a5\u5668\n\nA. \u7535\u7f06\u548c\u5265\u7ebf\u5668\u3002\u4f7f\u7528FC\u6280\u672f\u4e0d\u7528\u5265\u51fa\u88f8\u9732\u7684\u94dc\u7ebf\u3002\n\n\u56fe1. \u5265\u597d\u4e00\u7aef\u7684PROFIBUS\u7535\u7f06\u4e0e\u5feb\u901f\u5265\u7ebf\u5668\uff08FCS\uff0c\u8ba2\u8d27\u53f76GK1905-6AA00\uff09\u3002\n\nB. \u6253\u5f00PROFIBUS\u7f51\u7edc\u8fde\u63a5\u5668\u3002\u9996\u5148\u6253\u5f00\u7535\u7f06\u5f20\u529b\u91ca\u653e\u538b\u5757\uff0c\u7136\u540e\u6380\u5f00\u82af\u7ebf\u9501\u3002\n\n\u56fe2. \u6253\u5f00\u7684PROFIBUS\u8fde\u63a5\u5668\n\nC. \u53bb\u9664PROFIBUS\u7535\u7f06\u82af\u7ebf\u5916\u7684\u4fdd\u62a4\u5c42\uff0c\u5c06\u82af\u7ebf\u6309\u7167\u76f8\u5e94\u7684\u989c\u8272\u6807\u8bb0\u63d2\u5165\u82af\u7ebf\u9501\uff0c\u518d\u628a\u9501\u5757\u7528\u529b\u538b\u4e0b\uff0c\u4f7f\u5185\u90e8\u5bfc\u4f53\u63a5\u89e6\u3002\u5e94\u6ce8\u610f\u4f7f\u7535\u7f06\u5265\u51fa\u7684\u5c4f\u853d\u5c42\u4e0e\u5c4f\u853d\u8fde\u63a5\u538b\u7247\u63a5\u89e6\u3002\n\n\u56fe3. \u63d2\u5165\u7535\u7f06\n\n\u7531\u4e8e\u901a\u4fe1\u9891\u7387\u6bd4\u8f83\u9ad8\uff0c\u56e0\u6b64\u901a\u4fe1\u7535\u7f06\u91c7\u7528\u53cc\u7aef\u63a5\u5730\u3002\u7535\u7f06\u4e24\u5934\u90fd\u8981\u8fde\u63a5\u5c4f\u853d\u5c42\u3002\n\nD. \u590d\u4f4d\u7535\u7f06\u538b\u5757\uff0c\u62e7\u7d27\u87ba\u4e1d\uff0c\u6d88\u9664\u5916\u90e8\u62c9\u529b\u5bf9\u5185\u90e8\u8fde\u63a5\u7684\u5f71\u54cd\u3002\n\n### 5.2 \u7f51\u7edc\u8fde\u63a5\u5668\n\n\u7f51\u7edc\u8fde\u63a5\u5668\u4e3b\u8981\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff1a\u5e26\u548c\u4e0d\u5e26\u7f16\u7a0b\u53e3\u7684\u3002\u4e0d\u5e26\u7f16\u7a0b\u53e3\u7684\u63d2\u5934\u7528\u4e8e\u4e00\u822c\u8054\u7f51\uff0c\u5e26\u7f16\u7a0b\u53e3\u7684\u63d2\u5934\u53ef\u4ee5\u5728\u8054\u7f51\u7684\u540c\u65f6\u4ecd\u7136\u63d0\u4f9b\u4e00\u4e2a\u7f16\u7a0b\u8fde\u63a5\u7aef\u53e3\uff0c\u7528\u4e8e\u7f16\u7a0b\u6216\u8005\u8fde\u63a5HMI\u7b49\u3002\n\n\u56fe4. \u5de6\u4fa7\u4e3a\u4e0d\u5e26\u7f16\u7a0b\u53e3\u7684\u7f51\u7edc\u8fde\u63a5\u5668\uff08\u8ba2\u8d27\u53f7\uff1a6ES7 972-0BA52-0XA0\uff09\n\u53f3\u4fa7\u7684\u662f\u5e26\u7f16\u7a0b\u53e3\u7684\u7f51\u7edc\u8fde\u63a5\u5668\uff08\u8ba2\u8d27\u53f7\uff1a6ES7 972-0BB52-0XA0\uff09\n\n### 5.3 \u7ebf\u578b\u7f51\u7edc\u7ed3\u6784\n\n\u901a\u8fc7PROFIBUS\u7535\u7f06\u8fde\u63a5\u7f51\u7edc\u63d2\u5934\uff0c\u6784\u6210\u603b\u7ebf\u578b\u7f51\u7edc\u7ed3\u6784\u3002\n\n\u56fe5. \u603b\u7ebf\u578b\u7f51\u7edc\u8fde\u63a5\n\n\u5728\u4e0a\u56fe\u4e2d\uff0c\u7f51\u7edc\u8fde\u63a5\u5668A\u3001B\u3001C\u5206\u522b\u63d2\u5230\u4e09\u4e2a\u901a\u4fe1\u7ad9\u70b9\u7684\u901a\u4fe1\u53e3\u4e0a\uff1b\u7535\u7f06a\u628a\u63d2\u5934A\u548cB\u8fde\u63a5\u8d77\u6765\uff0c\u7535\u7f06b\u8fde\u63a5\u63d2\u5934B\u548cC\u3002\u7ebf\u578b\u7ed3\u6784\u53ef\u4ee5\u7167\u6b64\u6269\u5c55\u3002\n\n\u6ce8\u610f\u5706\u5708\u5185\u7684\"\u7ec8\u7aef\u7535\u963b\"\u5f00\u5173\u8bbe\u7f6e\u3002\u7f51\u7edc\u7ec8\u7aef\u7684\u63d2\u5934\uff0c\u5176\u7ec8\u7aef\u7535\u963b\u5f00\u5173\u5fc5\u987b\u653e\u5728\"ON\"\u7684\u4f4d\u7f6e\uff1b\u4e2d\u95f4\u7ad9\u70b9\u7684\u63d2\u5934\u5176\u7ec8\u7aef\u7535\u963b\u5f00\u5173\u5e94\u653e\u5728\"OFF\"\u4f4d\u7f6e\u3002\n\n### 5.4 \u7ec8\u7aef\u7535\u963b\u548c\u504f\u7f6e\u7535\u963b\n\n\u4e00\u4e2a\u6b63\u89c4\u7684RS-485\u7f51\u7edc\u4f7f\u7528\u7ec8\u7aef\u7535\u963b\u548c\u504f\u7f6e\u7535\u963b\u3002\u5728\u7f51\u7edc\u8fde\u63a5\u7ebf\u975e\u5e38\u77ed\u3001\u4e34\u65f6\u6216\u5b9e\u9a8c\u5ba4\u6d4b\u8bd5\u65f6\u4e5f\u53ef\u4ee5\u4e0d\u4f7f\u7528\u7ec8\u7aef\u548c\u504f\u7f6e\u7535\u963b\u3002\n\n\u7ec8\u7aef\u7535\u963b\uff1a\u5728\u7ebf\u578b\u7f51\u7edc\u4e24\u7aef\uff08\u76f8\u8ddd\u6700\u8fdc\u7684\u4e24\u4e2a\u901a\u4fe1\u7aef\u53e3\u4e0a\uff09\uff0c\u5e76\u8054\u5728\u4e00\u5bf9\u901a\u4fe1\u7ebf\u4e0a\u7684\u7535\u963b\u3002\u6839\u636e\u4f20\u8f93\u7ebf\u7406\u8bba\uff0c\u7ec8\u7aef\u7535\u963b\u53ef\u4ee5\u5438\u6536\u7f51\u7edc\u4e0a\u7684\u53cd\u5c04\u6ce2\uff0c\u6709\u6548\u5730\u589e\u5f3a\u4fe1\u53f7\u5f3a\u5ea6\u3002\u4e24\u4e2a\u7ec8\u7aef\u7535\u963b\u5e76\u8054\u540e\u7684\u503c\u5e94\u5f53\u57fa\u672c\u7b49\u4e8e\u4f20\u8f93\u7ebf\u5728\u901a\u4fe1\u9891\u7387\u4e0a\u7684\u7279\u6027\u963b\u6297 \u504f\u7f6e\u7535\u963b\uff1a\u504f\u7f6e\u7535\u963b\u7528\u4e8e\u5728\u7535\u6c14\u60c5\u51b5\u590d\u6742\u65f6\u786e\u4fddA\u3001B\u4fe1\u53f7\u7684\u76f8\u5bf9\u5173\u7cfb\uff0c\u4fdd\u8bc1\"0\"\u3001\"1\"\u4fe1\u53f7\u7684\u53ef\u9760\u6027\n\n\u897f\u95e8\u5b50\u7684PROFIBUS\u7f51\u7edc\u8fde\u63a5\u5668\u5df2\u7ecf\u5185\u7f6e\u4e86\u7ec8\u7aef\u548c\u504f\u7f6e\u7535\u963b\uff0c\u901a\u8fc7\u4e00\u4e2a\u5f00\u5173\u65b9\u4fbf\u5730\u63a5\u901a\u6216\u65ad\u5f00\u3002\u7ec8\u7aef\u548c\u504f\u7f6e\u7535\u963b\u7684\u503c\u5b8c\u5168\u7b26\u5408\u897f\u95e8\u5b50\u901a\u4fe1\u7aef\u53e3\u548cPROFIBUS\u7535\u7f06\u7684\u8981\u6c42\u3002\n\n\u5408\u4e0a\u7f51\u7edc\u4e2d\u7f51\u7edc\u63d2\u5934\u7684\u7ec8\u7aef\u7535\u963b\u5f00\u5173\uff0c\u53ef\u4ee5\u975e\u5e38\u65b9\u4fbf\u5730\u5207\u65ad\u63d2\u5934\u540e\u9762\u7684\u90e8\u5206\u7f51\u7edc\u7684\u4fe1\u53f7\u4f20\u8f93\u3002\n\n\u4e0e\u5176\u4ed6\u8bbe\u5907\u901a\u4fe1\u65f6\uff08\u91c7\u7528PROFIBUS\u7535\u7f06\uff09\uff0c\u5bf9\u65b9\u7684\u901a\u4fe1\u7aef\u53e3\u53ef\u80fd\u4e0d\u662fD-SUB9\u9488\u578b\u7684\uff0c\u6216\u8005\u5f15\u811a\u5b9a\u4e49\u5b8c\u5168\u4e0d\u540c\u3002\u5982\u897f\u95e8\u5b50\u7684MM4x0\u53d8\u9891\u5668\uff0cRS-485\u901a\u4fe1\u53e3\u91c7\u7528\u7aef\u5b50\u63a5\u7ebf\u5f62\u5f0f\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u9700\u8981\u53e6\u5916\u8fde\u63a5\u7ec8\u7aef\u7535\u963b\uff0c\u897f\u95e8\u5b50\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u6bd4\u8f83\u89c4\u6574\u7684\u5916\u63a5\u7535\u963b\u3002\u5bf9\u4e8e\u5176\u4ed6\u8bbe\u5907\uff0c\u53ef\u4ee5\u53c2\u7167\u300aS7-200\u7cfb\u7edf\u624b\u518c\u300b\u4e0a\u7684\u6280\u672f\u6570\u636e\u5236\u4f5c\u3002\n\n \u897f\u95e8\u5b50\u7f51\u7edc\u63d2\u5934\u4e2d\u7684\u7ec8\u7aef\u7535\u963b\u3001\u504f\u7f6e\u7535\u963b\u7684\u5927\u5c0f\u4e0e\u897f\u95e8\u5b50PROFIBUS\u7535\u7f06\u7684\u7279\u6027\u963b\u6297\u76f8\u5339\u914d\uff0c\u5f3a\u70c8\u5efa\u8bae\u7528\u6237\u914d\u5957\u4f7f\u7528\u897f\u95e8\u5b50\u7684PROFIBUS\u7535\u7f06\u548c\u7f51\u7edc\u63d2\u5934\u3002\u53ef\u4ee5\u907f\u514d\u8bb8\u591a\u9ebb\u70e6\u3002\n\n\u8bb0\u4f4f\u8054\u7f51\u7684\u683c\u8a00\uff1a\u4f60\u7cca\u5f04\u5b83\uff0c\u5b83\u5c31\u7cca\u5f04\u4f60\uff01\n\n---\n*modbus.cn*\n"