15.04.2025, 12:46
Hi
Can someone help me?
It's about the Pego refrigerator's modbus integration. Pego communicates with RTU 2-wire. Both W4K and Pego have 120 ohm termination resistors.
Pego is the only device in the RTU.
The following registers are in use:
- 256 int16
- 768 int16
- 1280 (Bitmap)
- 1281 (Bitmap)
- 1282 (Bitmap)
Modbus reports random CRC and read errors
I tried to read values with the read test, but I don't get an error message then. What can I do next? What could be wrong with the Modbus profile?
Attached: Pego modbus instructions (pdf) and a created modbus profile (json)
Can someone help me?


It's about the Pego refrigerator's modbus integration. Pego communicates with RTU 2-wire. Both W4K and Pego have 120 ohm termination resistors.
Pego is the only device in the RTU.
The following registers are in use:
- 256 int16
- 768 int16
- 1280 (Bitmap)
- 1281 (Bitmap)
- 1282 (Bitmap)
Modbus reports random CRC and read errors
I tried to read values with the read test, but I don't get an error message then. What can I do next? What could be wrong with the Modbus profile?
Attached: Pego modbus instructions (pdf) and a created modbus profile (json)