AutomationDirect CLICK Series User Manual

Exception Response (Exception Code)
When the slave CLICK PLC receives a request from the Modbus master that it cannot respond
to, the slave CLICK PLC sends an exception response to the Modbus master. The CLICK
PLC supports the following Exception Responses.
Exception Response (Exception Code)
Code Name Details of Exception Response
01
Illegal Function
The CLICK PLC does not support the function code received from the MODBUS
master.
02
Illegal Data Address The MODBUS master tried to access to an invalid address.
03
Illegal Data Value
The data length is zero or exceeds the maximum size.
The data for Write Single Coil is not FF00h (ON) or 0000h (OFF).
The PLC mode change request from the MODBUS master is not valid.
04
Slave Device Failure
Password is locked.
When the PLC mode switch is in STOP position, the MODBUS master
requested to switch to RUN mode.
When the PLC mode switch is in RUN position, the MODBUS master requested
to switch to the Firmware Update mode.
CLICK PLC Hardware User Manual, 6th Edition, Rev. F – C0-USER-M
4–28
Chapter 4: PLC Communications

AutomationDirect CLICK Series Specifications

General

Brand	AutomationDirect
Model	CLICK Series
Category	Controller
Language	English