Ecotech Acoem Serinus 10 - Table 30 - Modbus Error Codes

Parts List and Schematics
Page 221
Function code The initiating command’s function code + 128; so either 131 (read) or
144 (write).
Exception code The error code (see table below).
CRC As general command format.
Table 30 – Modbus Error Codes
Value
Error
1
Illegal Function
2
Illegal Data Address
3
Illegal Data Value
4
Slave Device Failure