Modbus Communication Down
Posted: Wed Nov 05, 2025 9:34 am
MCU : PIC24FJ512GA606
Communication : Modbus Slave on RS-232
This is an RS-232-based Modbus slave mode.
I'm using a Flash EEPROM component. The Flash EEPROM works fine. When I download a HEX file, communication works fine for a while, then stops. The digital output for monitoring works fine.
The same issue persists even after removing all other routines.
The device I compiled and installed previously on the same board (6/24/2025) works fine. After a reset, it works fine again, but then communication stops.
The same issue occurs with FC10 and FC11.
Please help.
Thank you.
Communication : Modbus Slave on RS-232
This is an RS-232-based Modbus slave mode.
I'm using a Flash EEPROM component. The Flash EEPROM works fine. When I download a HEX file, communication works fine for a while, then stops. The digital output for monitoring works fine.
The same issue persists even after removing all other routines.
The device I compiled and installed previously on the same board (6/24/2025) works fine. After a reset, it works fine again, but then communication stops.
The same issue occurs with FC10 and FC11.
Please help.
Thank you.