| MODBUS Function | MODBUS Address | PLC Target | Direction | |----------------|----------------|------------|-----------| | 03 (Read Holding Reg.) | 40001–40010 | D1000–D1009 | Master ← Slave | | 06 (Write Single Reg.) | D2000 | 40020 | Master → Slave | | 01 (Read Coils) | 00001–00008 | M0–M7 | Master ← Slave |
| Address (Dec) | Description | Set by Tool | |---------------|-------------|--------------| | 0–1 | Transmission settings | Yes | | 2–3 | Protocol selection | Yes | | 10–19 | Retry/timeout | Yes | | 100– | Auto refresh mapping table | Yes | | 2000– | MODBUS command list (master) | Yes | gx configurator-mb