8
Appendix
8.1
APPENDIX A - Exception codes
The FA 5xx Modbus uses the following exception codes when responding to the master
Exception Code
0x01
0x02
0x03
0x04
0x05
0x06
FA 5xx Modbus RTU Installation
Exception name
Illegal function
Illegal data address
Illegal data value
Slave device failure
Acknowledge
Slave device busy
V1.03
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