"# \u57fa\u4e8elibmodbus\u5e93\u7684Modbus\u8bfb\u5199\u7ebf\u5708\u5bc4\u5b58\u5668\u901a\u4fe1\u6d4b\u8bd5\u7a0b\u5e8f\n\n> 2024-04-21 | 2024-04-21\n> https:\/\/www.modbus.cn\/en\/27713.html\n\n**Modbus\u7f16\u7a0b\u5f00\u53d1**\n\n---\n\n\u5728\u73b0\u4ee3\u5de5\u4e1a\u901a\u4fe1\u4e2d\uff0cModbus \u534f\u8bae\u56e0\u5176\u7b80\u5355\u6027\u548c\u5e7f\u6cdb\u652f\u6301\u800c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u81ea\u52a8\u5316\u7cfb\u7edf\u4e2d\u3002\u6b64\u534f\u8bae\u652f\u6301\u591a\u79cd\u901a\u8baf\u65b9\u5f0f\uff0c\u5982\u4e32\u884c\u7ebf\uff08RTU\uff09\u548cTCP\/IP\u7b49\u3002\u4ee5\u4e0b\u6587\u7ae0\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u4e00\u4e2a\u4f7f\u7528 libmodbus \u5e93\u7684Modbus\u534f\u8bae\u7684\u6d4b\u8bd5\u7a0b\u5e8f\uff0c\u8be5\u7a0b\u5e8f\u901a\u8fc7\u5b9e\u73b0\u4e0d\u540c\u7684Modbus\u51fd\u6570\u6765\u9a8c\u8bc1\u5e93\u7684\u529f\u80fd\u6027\u3002\n\n\u5b8c\u6574\u4ee3\u7801\uff08\u4e2d\u6587\u6ce8\u91ca\uff09\uff1a\n\n```\n#include <stdio.h>\n#ifndef _MSC_VER\n#include <unistd.h>  \/\/ \u63d0\u4f9b\u6807\u51c6\u7684\u7b26\u53f7\u5e38\u91cf\u548c\u7c7b\u578b\n#endif\n#include <errno.h>   \/\/ \u9519\u8bef\u53f7\u5b9a\u4e49\n#include <stdlib.h>\n#include <string.h>\n\n#include <modbus.h>  \/\/ \u5f15\u5165libmodbus\u5e93\n\n\/* \u5b9a\u4e49\u4e00\u4e9b\u7528\u4e8e\u6d4b\u8bd5\u7684\u5e38\u91cf *\/\n#define LOOP          1\n#define SERVER_ID     17\n#define ADDRESS_START 0\n#define ADDRESS_END   99\n\n\/* \u4e3b\u51fd\u6570 *\/\nint main(void)\n{\n    modbus_t *ctx;  \/\/ \u5b9a\u4e49\u4e00\u4e2amodbus_t\u7c7b\u578b\u7684\u6307\u9488\uff0c\u7528\u4e8e\u5b58\u50a8\u8fde\u63a5\u4e0a\u4e0b\u6587\n    int rc;  \/\/ \u7528\u4e8e\u63a5\u6536\u51fd\u6570\u8fd4\u56de\u503c\n    int nb_fail;  \/\/ \u5931\u8d25\u6b21\u6570\u8ba1\u6570\n    int nb_loop;  \/\/ \u5faa\u73af\u8ba1\u6570\n    int addr;  \/\/ \u5730\u5740\u8ba1\u6570\n    int nb;  \/\/ \u5b58\u50a8\u5730\u5740\u6570\u91cf\n    uint8_t *tab_rq_bits;  \/\/ \u7528\u4e8e\u8bf7\u6c42\u7684\u4f4d\u7f13\u51b2\u533a\n    uint8_t *tab_rp_bits;  \/\/ \u7528\u4e8e\u54cd\u5e94\u7684\u4f4d\u7f13\u51b2\u533a\n    uint16_t *tab_rq_registers;  \/\/ \u7528\u4e8e\u8bf7\u6c42\u7684\u5bc4\u5b58\u5668\u7f13\u51b2\u533a\n    uint16_t *tab_rw_rq_registers;  \/\/ \u7528\u4e8e\u8bfb\u5199\u8bf7\u6c42\u7684\u5bc4\u5b58\u5668\u7f13\u51b2\u533a\n    uint16_t *tab_rp_registers;  \/\/ \u7528\u4e8e\u54cd\u5e94\u7684\u5bc4\u5b58\u5668\u7f13\u51b2\u533a\n\n    \/* \u4f7f\u7528TCP\u8fde\u63a5 *\/\n    ctx = modbus_new_tcp(\"127.0.0.1\", 1502);  \/\/ \u521b\u5efa\u4e00\u4e2aTCP\u8fde\u63a5\n    modbus_set_debug(ctx, TRUE);  \/\/ \u8bbe\u7f6e\u8c03\u8bd5\u6a21\u5f0f\n\n    \/* \u8fde\u63a5Modbus\u670d\u52a1\u5668 *\/\n    if (modbus_connect(ctx) == -1) {\n        fprintf(stderr, \"Connection failed: %s\\n\", modbus_strerror(errno));\n        modbus_free(ctx);\n        return -1;\n    }\n\n    \/* \u5206\u914d\u5e76\u521d\u59cb\u5316\u5185\u5b58\u7a7a\u95f4 *\/\n    nb = ADDRESS_END - ADDRESS_START;  \/\/ \u8ba1\u7b97\u5730\u5740\u8303\u56f4\u5185\u7684\u6570\u91cf\n\n    tab_rq_bits = (uint8_t *) malloc(nb * sizeof(uint8_t));  \/\/ \u5206\u914d\u4f4d\u8bf7\u6c42\u7f13\u51b2\u533a\n    memset(tab_rq_bits, 0, nb * sizeof(uint8_t));  \/\/ \u521d\u59cb\u5316\u4f4d\u8bf7\u6c42\u7f13\u51b2\u533a\n\n    tab_rp_bits = (uint8_t *) malloc(nb * sizeof(uint8_t));  \/\/ \u5206\u914d\u4f4d\u54cd\u5e94\u7f13\u51b2\u533a\n    memset(tab_rp_bits, 0, nb * sizeof(uint8_t));  \/\/ \u521d\u59cb\u5316\u4f4d\u54cd\u5e94\u7f13\u51b2\u533a\n\n    tab_rq_registers = (uint16_t *) malloc(nb * sizeof(uint16_t));  \/\/ \u5206\u914d\u5bc4\u5b58\u5668\u8bf7\u6c42\u7f13\u51b2\u533a\n    memset(tab_rq_registers, 0, nb * sizeof(uint16_t));  \/\/ \u521d\u59cb\u5316\u5bc4\u5b58\u5668\u8bf7\u6c42\u7f13\u51b2\u533a\n\n    tab_rp_registers = (uint16_t *) malloc(nb * sizeof(uint16_t));  \/\/ \u5206\u914d\u5bc4\u5b58\u5668\u54cd\u5e94\u7f13\u51b2\u533a\n    memset(tab_rp_registers, 0, nb * sizeof(uint16_t));  \/\/ \u521d\u59cb\u5316\u5bc4\u5b58\u5668\u54cd\u5e94\u7f13\u51b2\u533a\n\n    tab_rw_rq_registers = (uint16_t *) malloc(nb * sizeof(uint16_t));  \/\/ \u5206\u914d\u8bfb\u5199\u5bc4\u5b58\u5668\u8bf7\u6c42\u7f13\u51b2\u533a\n    memset(tab_rw_rq_registers, 0, nb * sizeof(uint16_t));  \/\/ \u521d\u59cb\u5316\u8bfb\u5199\u5bc4\u5b58\u5668\u8bf7\u6c42\u7f13\u51b2\u533a\n\n    nb_loop = nb_fail = 0;  \/\/ \u521d\u59cb\u5316\u5faa\u73af\u6b21\u6570\u548c\u5931\u8d25\u6b21\u6570\n    while (nb_loop++ < LOOP) {  \/\/ \u5faa\u73af\u6d4b\u8bd5\u6307\u5b9a\u6b21\u6570\n        for (addr = ADDRESS_START; addr < ADDRESS_END; addr++) {  \/\/ \u904d\u5386\u5730\u5740\u8303\u56f4\n            int i;\n\n            \/* \u968f\u673a\u751f\u6210\u6d4b\u8bd5\u6570\u636e *\/\n            for (i = 0; i < nb; i++) {\n                tab_rq_registers[i] = (uint16_t) (65535.0 * rand() \/ (RAND_MAX + 1.0));  \/\/ \u751f\u6210\u968f\u673a\u5bc4\u5b58\u5668\u503c\n                tab_rw_rq_registers[i] = ~tab_rq_registers[i];  \/\/ \u751f\u6210\u5bf9\u5e94\u7684\u53cd\u8f6c\u503c\n                tab_rq_bits[i] = tab_rq_registers[i] % 2;  \/\/ \u751f\u6210\u968f\u673a\u4f4d\u503c\n            }\n            nb = ADDRESS_END - addr;  \/\/ \u66f4\u65b0\u5730\u5740\u8303\u56f4\n\n            \/* \u4e0b\u9762\u90e8\u5206\u8c03\u7528libmodbus\u5e93\u7684\u51fd\u6570\u6267\u884cModbus\u547d\u4ee4\uff0c\u5e76\u6839\u636e\u8fd4\u56de\u503c\u5224\u65ad\u64cd\u4f5c\u662f\u5426\u6210\u529f *\/\n            \/* \u6d4b\u8bd5\u5185\u5bb9\u5305\u62ec\uff1a\u5355\u4e2a\u548c\u591a\u4e2a\u4f4d\u7684\u8bfb\u5199\uff0c\u5355\u4e2a\u548c\u591a\u4e2a\u5bc4\u5b58\u5668\u7684\u8bfb\u5199 *\/\n\n            \/* WRITE BIT *\/\n            rc = modbus_write_bit(ctx, addr, tab_rq_bits[0]);  \/\/ \u5199\u5165\u5355\u4e2a\u4f4d\n            if (rc != 1) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                printf(\"ERROR modbus_write_bit (%d)\\n\", rc);\n                printf(\"Address = %d, value = %d\\n\", addr, tab_rq_bits[0]);\n                nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n            } else {\n                rc = modbus_read_bits(ctx, addr, 1, tab_rp_bits);  \/\/ \u8bfb\u53d6\u5355\u4e2a\u4f4d\n                if (rc != 1 || tab_rq_bits[0] != tab_rp_bits[0]) {  \/\/ \u6bd4\u8f83\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u503c\u662f\u5426\u4e00\u81f4\n                    printf(\"ERROR modbus_read_bits single (%d)\\n\", rc);\n                    printf(\"address = %d\\n\", addr);\n                    nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                }\n            }\n\n            \/* MULTIPLE BITS *\/\n            rc = modbus_write_bits(ctx, addr, nb, tab_rq_bits);  \/\/ \u5199\u5165\u591a\u4e2a\u4f4d\n            if (rc != nb) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                printf(\"ERROR modbus_write_bits (%d)\\n\", rc);\n                printf(\"Address = %d, nb = %d\\n\", addr, nb);\n                nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n            } else {\n                rc = modbus_read_bits(ctx, addr, nb, tab_rp_bits);  \/\/ \u8bfb\u53d6\u591a\u4e2a\u4f4d\n                if (rc != nb) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                    printf(\"ERROR modbus_read_bits\\n\");\n                    printf(\"Address = %d, nb = %d\\n\", addr, nb);\n                    nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                } else {\n                    for (i = 0; i < nb; i++) {  \/\/ \u6bd4\u8f83\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u4f4d\u503c\u662f\u5426\u4e00\u81f4\n                        if (tab_rp_bits[i] != tab_rq_bits[i]) {\n                            printf(\"ERROR modbus_read_bits\\n\");\n                            printf(\"Address = %d, value %d (0x%X) != %d (0x%X)\\n\",\n                                   addr,\n                                   tab_rq_bits[i],\n                                   tab_rq_bits[i],\n                                   tab_rp_bits[i],\n                                   tab_rp_bits[i]);\n                            nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                        }\n                    }\n                }\n            }\n\n            \/* SINGLE REGISTER *\/\n            rc = modbus_write_register(ctx, addr, tab_rq_registers[0]);  \/\/ \u5199\u5165\u5355\u4e2a\u5bc4\u5b58\u5668\n            if (rc != 1) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                printf(\"ERROR modbus_write_register (%d)\\n\", rc);\n                printf(\"Address = %d, value = %d (0x%X)\\n\",\n                       addr,\n                       tab_rq_registers[0],\n                       tab_rq_registers[0]);\n                nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n            } else {\n                rc = modbus_read_registers(ctx, addr, 1, tab_rp_registers);  \/\/ \u8bfb\u53d6\u5355\u4e2a\u5bc4\u5b58\u5668\n                if (rc != 1) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                    printf(\"ERROR modbus_read_registers single (%d)\\n\", rc);\n                    printf(\"Address = %d\\n\", addr);\n                    nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                } else {\n                    if (tab_rq_registers[0] != tab_rp_registers[0]) {  \/\/ \u6bd4\u8f83\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u5bc4\u5b58\u5668\u503c\u662f\u5426\u4e00\u81f4\n                        printf(\"ERROR modbus_read_registers single\\n\");\n                        printf(\"Address = %d, value = %d (0x%X) != %d (0x%X)\\n\",\n                               addr,\n                               tab_rq_registers[0],\n                               tab_rq_registers[0],\n                               tab_rp_registers[0],\n                               tab_rp_registers[0]);\n                        nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                    }\n                }\n            }\n\n            \/* MULTIPLE REGISTERS *\/\n            rc = modbus_write_registers(ctx, addr, nb, tab_rq_registers);  \/\/ \u5199\u5165\u591a\u4e2a\u5bc4\u5b58\u5668\n            if (rc != nb) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                printf(\"ERROR modbus_write_registers (%d)\\n\", rc);\n                printf(\"Address = %d, nb = %d\\n\", addr, nb);\n                nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n            } else {\n                rc = modbus_read_registers(ctx, addr, nb, tab_rp_registers);  \/\/ \u8bfb\u53d6\u591a\u4e2a\u5bc4\u5b58\u5668\n                if (rc != nb) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                    printf(\"ERROR modbus_read_registers (%d)\\n\", rc);\n                    printf(\"Address = %d, nb = %d\\n\", addr, nb);\n                    nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                } else {\n                    for (i = 0; i < nb; i++) {  \/\/ \u6bd4\u8f83\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u5bc4\u5b58\u5668\u503c\u662f\u5426\u4e00\u81f4\n                        if (tab_rq_registers[i] != tab_rp_registers[i]) {\n                            printf(\"ERROR modbus_read_registers\\n\");\n                            printf(\"Address = %d, value %d (0x%X) != %d (0x%X)\\n\",\n                                   addr,\n                                   tab_rq_registers[i],\n                                   tab_rq_registers[i],\n                                   tab_rp_registers[i],\n                                   tab_rp_registers[i]);\n                            nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                        }\n                    }\n                }\n            }\n            \/* R\/W MULTIPLE REGISTERS *\/\n            rc = modbus_write_and_read_registers(\n                ctx, addr, nb, tab_rw_rq_registers, addr, nb, tab_rp_registers);  \/\/ \u540c\u65f6\u5199\u5165\u548c\u8bfb\u53d6\u591a\u4e2a\u5bc4\u5b58\u5668\n            if (rc != nb) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                printf(\"ERROR modbus_read_and_write_registers (%d)\\n\", rc);\n                printf(\"Address = %d, nb = %d\\n\", addr, nb);\n                nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n            } else {\n                for (i = 0; i < nb; i++) {  \/\/ \u6bd4\u8f83\u8bfb\u53d6\u7684\u5bc4\u5b58\u5668\u503c\u662f\u5426\u4e0e\u5199\u5165\u7684\u503c\u4e00\u81f4\n                    if (tab_rp_registers[i] != tab_rw_rq_registers[i]) {\n                        printf(\"ERROR modbus_read_and_write_registers READ\\n\");\n                        printf(\"Address = %d, value %d (0x%X) != %d (0x%X)\\n\",\n                               addr,\n                               tab_rp_registers[i],\n                               tab_rw_rq_registers[i],\n                               tab_rp_registers[i],\n                               tab_rw_rq_registers[i]);\n                        nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                    }\n                }\n\n                rc = modbus_read_registers(ctx, addr, nb, tab_rp_registers);  \/\/ \u518d\u6b21\u8bfb\u53d6\u5bc4\u5b58\u5668\n                if (rc != nb) {  \/\/ \u5224\u65ad\u8fd4\u56de\u503c\u662f\u5426\u6b63\u786e\n                    printf(\"ERROR modbus_read_registers (%d)\\n\", rc);\n                    printf(\"Address = %d, nb = %d\\n\", addr, nb);\n                    nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                } else {\n                    for (i = 0; i < nb; i++) {  \/\/ \u6bd4\u8f83\u518d\u6b21\u8bfb\u53d6\u7684\u5bc4\u5b58\u5668\u503c\u662f\u5426\u4e0e\u4e4b\u524d\u5199\u5165\u7684\u503c\u4e00\u81f4\n                        if (tab_rw_rq_registers[i] != tab_rp_registers[i]) {\n                            printf(\"ERROR modbus_read_and_write_registers WRITE\\n\");\n                            printf(\"Address = %d, value %d (0x%X) != %d (0x%X)\\n\",\n                                   addr,\n                                   tab_rw_rq_registers[i],\n                                   tab_rw_rq_registers[i],\n                                   tab_rp_registers[i],\n                                   tab_rp_registers[i]);\n                            nb_fail++;  \/\/ \u5931\u8d25\u6b21\u6570\u589e\u52a0\n                        }\n                    }\n                }\n            }\n        }\n\n        printf(\"Test: \");\n        if (nb_fail)\n            printf(\"%d FAILS\\n\", nb_fail);\n        else\n            printf(\"SUCCESS\\n\");\n    }\n\n    \/* Free the memory *\/\n    free(tab_rq_bits);\n    free(tab_rp_bits);\n    free(tab_rq_registers);\n    free(tab_rp_registers);\n    free(tab_rw_rq_registers);\n\n    \/* Close the connection *\/\n    modbus_close(ctx);\n    modbus_free(ctx);\n\n    return 0;\n}\n\n```\n\n### \u7a0b\u5e8f\u6982\u8ff0\n\n\u8fd9\u4e2a\u6d4b\u8bd5\u7a0b\u5e8f\u7684\u76ee\u6807\u662f\u9a8c\u8bc1 libmodbus \u5e93\u652f\u6301\u7684\u6240\u6709\u4e3b\u8981\u529f\u80fd\uff0c\u5305\u62ec\u5199\u5355\u4e2a\u7ebf\u5708\u3001\u8bfb\u7ebf\u5708\u72b6\u6001\u3001\u5199\u591a\u4e2a\u7ebf\u5708\u3001\u5199\u5355\u4e2a\u5bc4\u5b58\u5668\u3001\u8bfb\u5bc4\u5b58\u5668\u3001\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u3001\u4ee5\u53ca\u8bfb\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u7b49\u3002\u7a0b\u5e8f\u8fd0\u884c\u5728\u4e24\u79cd\u6a21\u5f0f\u4e0b\uff1aTCP\u548cRTU\uff0c\u8fd9\u662f\u901a\u8fc7\u547d\u4ee4\u884c\u53c2\u6570\u6765\u9009\u62e9\u7684\u3002\n\n### \u73af\u5883\u8bbe\u7f6e\u4e0e\u521d\u59cb\u6761\u4ef6\n\n\u7a0b\u5e8f\u9996\u5148\u6839\u636e\u8f93\u5165\u53c2\u6570\uff08TCP \u6216 RTU\uff09\u521d\u59cb\u5316 Modbus \u4e0a\u4e0b\u6587\uff08`ctx`\uff09\u3002\u5bf9\u4e8e TCP \u6a21\u5f0f\uff0c\u5b83\u8fde\u63a5\u5230\u672c\u5730\u4e3b\u673a\u4e0a\u7684 1502 \u7aef\u53e3\u3002\u800c\u5bf9\u4e8e RTU \u6a21\u5f0f\uff0c\u5b83\u5219\u8bbe\u7f6e\u4e3a\u901a\u8fc7\u7279\u5b9a\u7684\u4e32\u884c\u7aef\u53e3\uff08\u5982 `\/dev\/ttyUSB0`\uff09\u4ee5 19200 \u6ce2\u7279\u7387\u8fdb\u884c\u901a\u8baf\u3002\n\n### \u6570\u636e\u7ed3\u6784\u4e0e\u521d\u59cb\u5316\n\n\u4e3a\u4e86\u8fdb\u884c\u6d4b\u8bd5\uff0c\u7a0b\u5e8f\u9996\u5148\u5206\u914d\u5e76\u521d\u59cb\u5316\u4e86\u51e0\u4e2a\u6570\u7ec4\uff0c\u7528\u4e8e\u5b58\u50a8\u6d4b\u8bd5\u4e2d\u4f7f\u7528\u7684\u4f4d\u548c\u5bc4\u5b58\u5668\u503c\uff1a\n\n- `tab_rq_bits` \u548c `tab_rp_bits` \u7528\u4e8e\u5b58\u50a8\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u7ebf\u5708\uff08\u4f4d\uff09\u72b6\u6001\u3002\n\n- `tab_rq_registers`\u3001`tab_rp_registers` \u548c `tab_rw_rq_registers` \u7528\u4e8e\u5b58\u50a8\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u5bc4\u5b58\u5668\u503c\u3002\n\n### \u6d4b\u8bd5\u5faa\u73af\n\n\u7a0b\u5e8f\u5728\u5b9a\u4e49\u7684\u5730\u5740\u8303\u56f4\u5185\u8fdb\u884c\u5faa\u73af\u6d4b\u8bd5\uff0c\u6bcf\u6b21\u5faa\u73af\u5730\u5740\u52a0\u4e00\uff0c\u76f4\u81f3\u8986\u76d6\u4ece `ADDRESS_START` \u5230 `ADDRESS_END` \u7684\u8303\u56f4\u3002\u5728\u6bcf\u4e2a\u5730\u5740\uff0c\u7a0b\u5e8f\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a\n\n- **\u5199\u5355\u4e2a\u7ebf\u5708**\uff1a\u9a8c\u8bc1\u80fd\u5426\u6210\u529f\u5199\u5165\u5e76\u8bfb\u56de\u5355\u4e2a\u7ebf\u5708\u3002\n\n- **\u5199\u591a\u4e2a\u7ebf\u5708**\uff1a\u9a8c\u8bc1\u80fd\u5426\u6210\u529f\u5199\u5165\u5e76\u8bfb\u56de\u591a\u4e2a\u7ebf\u5708\u3002\n\n- **\u5199\u5355\u4e2a\u5bc4\u5b58\u5668**\uff1a\u9a8c\u8bc1\u80fd\u5426\u6210\u529f\u5199\u5165\u5e76\u8bfb\u56de\u5355\u4e2a\u5bc4\u5b58\u5668\u3002\n\n- **\u5199\u591a\u4e2a\u5bc4\u5b58\u5668**\uff1a\u9a8c\u8bc1\u80fd\u5426\u6210\u529f\u5199\u5165\u5e76\u8bfb\u56de\u591a\u4e2a\u5bc4\u5b58\u5668\u3002\n\n- **\u540c\u65f6\u8bfb\u5199\u591a\u4e2a\u5bc4\u5b58\u5668**\uff1a\u9a8c\u8bc1\u80fd\u5426\u6210\u529f\u5728\u4e00\u4e2a\u64cd\u4f5c\u4e2d\u540c\u65f6\u8bfb\u5199\u591a\u4e2a\u5bc4\u5b58\u5668\u3002\n\n### \u5f02\u5e38\u5904\u7406\n\n\u6bcf\u4e2a Modbus \u64cd\u4f5c\u540e\uff0c\u7a0b\u5e8f\u68c0\u67e5\u8fd4\u56de\u7684\u7ed3\u679c\uff0c\u4ee5\u786e\u8ba4\u64cd\u4f5c\u662f\u5426\u6210\u529f\u3002\u5982\u679c\u64cd\u4f5c\u5931\u8d25\uff0c\u7a0b\u5e8f\u4f1a\u8f93\u51fa\u9519\u8bef\u6d88\u606f\u5e76\u589e\u52a0\u5931\u8d25\u8ba1\u6570\u5668\u3002\u6d4b\u8bd5\u7ee7\u7eed\u8fdb\u884c\u76f4\u5230\u6240\u6709\u9884\u5b9a\u7684\u6d4b\u8bd5\u90fd\u5b8c\u6210\u3002\n\n### \u7ed3\u679c\u8f93\u51fa\n\n\u5728\u6d4b\u8bd5\u7ed3\u675f\u540e\uff0c\u7a0b\u5e8f\u4f1a\u8f93\u51fa\u6d4b\u8bd5\u7ed3\u679c\uff0c\u663e\u793a\u6210\u529f\u6216\u5931\u8d25\u7684\u64cd\u4f5c\u603b\u6570\u3002\u8fd9\u662f\u901a\u8fc7\u6bd4\u8f83\u8bf7\u6c42\u6570\u636e\u548c\u54cd\u5e94\u6570\u636e\u6765\u786e\u5b9a\u7684\uff0c\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u51c6\u786e\u6027\u3002\n\n### \u6e05\u7406\u4e0e\u5173\u95ed\n\n\u6d4b\u8bd5\u5b8c\u6210\u540e\uff0c\u7a0b\u5e8f\u91ca\u653e\u6240\u6709\u5206\u914d\u7684\u8d44\u6e90\uff0c\u5173\u95edModbus\u8fde\u63a5\uff0c\u5e76\u9000\u51fa\u3002\n\n\u901a\u8fc7\u8fd9\u6837\u7684\u6d4b\u8bd5\u7a0b\u5e8f\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u9a8c\u8bc1Modbus\u5e93\u5728\u4e0d\u540c\u8bbe\u7f6e\u4e0b\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\uff0c\u786e\u4fdd\u5176\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u7a33\u5b9a\u8fd0\u884c\u3002\u8fd9\u4e0d\u4ec5\u5e2e\u52a9\u5f00\u53d1\u8005\u6df1\u5165\u4e86\u89e3Modbus\u534f\u8bae\u7684\u5b9e\u73b0\uff0c\u4e5f\u4e3a\u627e\u51fa\u6f5c\u5728\u7684\u95ee\u9898\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5f3a\u6709\u529b\u7684\u5de5\u5177\u3002\n\n---\n*modbus.cn*\n"