Publication 1766-RM001A-EN-P - October 2008
622 Protocol Configuration
87 Negative Acknowledge The slave cannot perform the program function received in the
command.
7
88 Memory Parity Error The slave attempted to read extended memory, but detected a
parity error in the memory.
8
89 Non-standard Error Code An error code greater than 8 was returned by the slave. >8
Modbus Error Codes in Modbus RTU Master MSG Instruction
Error
Code
Error Description Received
Exception Code
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