FA275098
30 September 2021
Symptoms:
- If you use the READ_VAR at address 130 with quantity = 1 you will get an error : CommError = 254 and OperError = 3.
- If you change the quantity = 2 you will still get the same error : CommError = 254 and OperError = 3: You will get the high order byte in %MW130 = 0 and lower order byte in %MW131 = 0.
The general register list for the Power meters gives you the Jbus addressing registers and not the Modbus addressing registers.
Jbus addressing starts at n and the Modbus addressing then should be n -1.
- If you now use the READ_VAR at address 129 (n -1) with quantity = 1 you will get the same error : CommError = 254 and OperError = 3.
- If you change the quantity = 2 life is good: You will get the high order byte in %MW130 = xxxx and lower order byte in %MW131 = xxx.