1. Overview
The Panasonic A6 series servo drive supports Modbus RTU communication through its RS485 interface. Based on the official Panasonic technical manual, this article describes the Modbus register address mapping of the A6 servo drive in detail.
2. Modbus Communication Parameters
| Parameter No. | Parameter Name | Description |
|---|
| No.40 | Communication station number | Sets the slave address (1-63) |
| No.41 | Communication baud rate | Sets the baud rate |
| No.42 | Communication format | Data bits / parity / stop bits |
| No.43 | Communication protocol | Select Modbus RTU |
3. A6 Servo Modbus Register Mapping Table
3.1 Control Registers
| Modbus Address | Description | Read/Write |
|---|
| 0x0000 | Servo ON control | Read/Write |
| 0x0001 | Fault reset | Read/Write |
| 0x0002 | Position command | Read/Write |
3.2 Status Registers
| Modbus Address | Description |
|---|
| 0x1000 | Servo status |
| 0x1001 | Current position |
| 0x1002 | Current speed |
| 0x1003 | Torque command |
4. FAQ and Troubleshooting
- Check that the No.43 communication protocol is set to Modbus RTU
- Confirm that the slave address and baud rate match on both sides
- The position command is 32-bit data and requires two registers
- Pay attention to the byte order and word order
5. Summary
Core registers for Panasonic A6 servo Modbus communication:
- 0x0000 → Servo ON control
- 0x0002 → Position command
- 0x1001 → Current position
- 0x1002 → Current speed
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