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AC800 Series Intelligent Machine Controller Hardware User Guide Appendix
Error Code Description Remedy
0x83 Modbus RTU1:CRC check failed
1. Check that the termination resistor is set correctly
2. Improve the wiring, for example, by removing any
possible source of interference
0x84 Modbus RTU1:Illegal function Check the slave instruction code
0x85 Modbus RTU1:Communication time out
1. Check that the slave is working properly
2. Check the wiring for disconnection
3. Check that the termination resistor is set correctly
4. Improve the wiring, for example, by removing any
possible source of interference
0x86 Modbus RTU1:Illegal data value Check the data range written by the slave
0x87 Modbus RTU1:Buer overow Reduce communication load
0x88 Modbus RTU1:Server device failure Check slave communication equipment
0x89 Modbus RTU1:Serial port setting error Check the communication congurations
Ethernet (MODBUS TCP)
0x90 Modbus TCP:Slave address setting error Set a correct slave address
0x91 Modbus TCP:Frame length error Correct the data frame
0x92 Modbus TCP:Illegal data address Correct the data address
0x93 Modbus TCP:CRC check failed
1. Check that the termination resistor is set correctly
2. Improve the wiring, for example, by removing any
possible source of interference
0x94 Modbus TCP:Illegal function Check the slave instruction code
0x95 Modbus TCP:Communication time out
1. Check that the slave is working properly
2. Check the wiring for disconnection
3. Check that the termination resistor is set correctly
4. Improve the wiring, for example, by removing any
possible source of interference
0x96 Modbus TCP:Illegal data value Check the data range written by the slave
0x97 Modbus TCP:Buer overow Reduce communication load
0x98 Modbus TCP:Server device failure Check slave communication equipment
0x9A
Modbus TCP:Destination XX is
unreachable
1. Check that the slave is working properly
2. Check the wiring for disconnection
3. Check master hardware
4. Improve the wiring, for example, by removing any
possible source of interference
0x9B Modbus TCP:Protocol identier error Check protocol identier
CPU error
0x21 System:Runtime crashed
0x22
System:Comm.Timeout between PLC &
LCD Panel
1. Power on again
2. Contact the manufacturer
Permission error
0x23
Authentication failed, please contact the
supplier!
Contact the manufacturer
Battery fault
0x24
Battery voltage is too low or battery is in
reverse, please check the battery!
1. Check that the button battery is installed correctly
2. Replace the button battery
Fan fault
0x25 Fan is broken! 1. Check the fan 2. Replace the fan as needed