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3.13.3 Remote RESET
This operation externally resets the CPU module when the CPU module is in the STOP status. Even if the switch of the
CPU module is in the RUN position, this operation can be performed when the module is stopped due to an error. Use
this function when an error occurred in the CPU module that is beyond the reach.
(1) Executing method
There are two methods for performing the remote RESET operation.
• Using a programming tool
• By an external device using the MC protocol
Before performing the remote RESET operation, select the "Allow" checkbox for the remote RESET operation in
the PLC System tab of the PLC Parameter dialog box, and then write the parameter setting to the CPU module.
Project window [Parameter] [PLC Parameter] [PLC System]
(a) Using a programming tool
Open the "Remote Operation" dialog box.
[Online] [Remote Operation]
(b) By an external device using the MC protocol
Use MC protocol commands.
MELSEC-Q/L MELSEC Communication Protocol Reference Manual
(2) Status after reset processing
When the remote RESET operation is completed, the CPU module will be placed in the operating status set by
the switch. Consider the operating status of the CPU module after the reset operation if the CPU module had
stopped due to an error.
(3) Precautions
Note that the CPU module may not be reset by the remote RESET operation due to noise. In this case, reset the
CPU module using the switch or power off and then on the CPU module.
Select this checkbox before
performing remote RESET.
Select "RESET"
for execution.
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