Modbus TCP read error
Posted: Wed Apr 15, 2026 4:22 am
I want to aggregate multiple devices operating via Modbus RTU serial and transmit data using Modbus TCP.
MCU: PIC24FJ512GA606
LAN: W5500
When checking in Modbus POLL, it does not work at all and only repeats read error and write error. If I delete the listen (502) from network comm in the main directory, a message appears stating that the server has closed it.
Please help.
MCU: PIC24FJ512GA606
LAN: W5500
When checking in Modbus POLL, it does not work at all and only repeats read error and write error. If I delete the listen (502) from network comm in the main directory, a message appears stating that the server has closed it.
Please help.