Yaskawa DeviceNet Option Card CM059 - Manual (Page 62)

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I/O Message Communication Modbus I/O Instance Errors
Table 48: Modbus I/O Instance Errors and Their Causes
Error
Code
Content Causes
01 Hex Function code error Function code from the master was other than 00 Hex, 03 Hex, and 10 Hex.
02 Hex Register No. error
A register # was not found.
Enter command (0900 Hex) registered for write started to read.
21 Hex Data setting error
Parameter setting error occurred by a parameter write.
Upper and lower byte values were out of alignment, swapped.
22 Hex Write mode error
A parameter was attempted to write from the master during run.
Enter command was attempted write from the master during UV.
A parameter was attempted to write from the master during UV.
Enter command was attempted to write from the master during UV.
A parameter was attempted to write from the master during data store.
Data for read only was attempted to write from the master.
23 Hex Write during UV
Attempted to write a parameter from the master while UV was occurring.
Attempted to write an enter command from the master while UV was occurring.
24 Hex
Write during
parameter processing
Attempted to write a parameter from the master while data was being stored.