Communication Errors; Communication Errors; Memobus/Modbus Error Codes; Slave Not Responding - Omron J1000 User Manual

C.12 Communication Errors
C.12 Communication Errors
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MEMOBUS/Modbus Error Codes

A list of MEMOBUS/Modbus errors appears below.
When an error occurs, remove whatever caused the error and restart communications.
Error Code
Function Code Error
01H
• Attempted to set a function code from a PLC other than 03H, 08H, and 10H.
Register Number Error
02H
• A register number specified in the command message does not exist.
• Attempted to send a broadcast message using other register numbers than 0001H or 0002H.
Bit Count Error
• Read data or write data is greater than 16 bits. Invalid command message quantity.
03H
• In a write message, the "Number of Data Items" contained within the message does not equal twice the amount of data
words (i.e., the total of Data 1+ Data 2, etc.).
Data Setting Error
21H
• Control data or parameter write data is outside the allowable setting range.
• Attempted to write a contradictory parameter setting.
Write Mode Error
• Attempted to write while the drive was operating to a parameter that cannot be written to during run.
22H
• During an EEPROM data error (CPF06), the master attempted to write to a parameter other than A1-00 to -05, E1-03, or
o2-04.
• Attempted to write to read-only data.
DC Bus Undervoltage Write Error
23H
• Attempted to write from the master during an undervoltage fault (Uv1).
• Attempted to execute and Enter command during Uv1.
Write Error During Parameter Process
24H
• Master attempted writing to the drive while the drive was processing parameter data.
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Slave Not Responding

In the following situations, the slave drive will ignore the command message sent from the master, and not send a response
message:
• When a communications error (overrun, framing, parity or CRC-16) is detected in the command message.
• When the slave address in the command message and the slave address in the drive do not match (remember to set the
slave address for the drive using H5-01).
• When the gap between two blocks (8 bit) of a message exceeds 24 bits.
• When the command message data length is invalid.
Note: If the slave address specified in the command message is 00H, all slaves execute the write function, but do not return response messages
to the master.
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Error Name
Cause
SIEP C710606 33A OYMC AC Drive – J1000 User Manual