Filter
Top Products
9 TROUBLESHOOTING
9.4 Error Status and Operations on Occurrence of an Error
123
9
9.4 Error Status and Operations on Occurrence of an
Error
When an error occurs, the CPU module performs preconfigured actions depending on the status of the error.
Error status
Errors are classified into the following three types according to the urgency of the errors.
Operation at the occurrence of an error
Errors are classified into stop errors and continuable errors.
■Stop error
When a stop error occurs, the CPU module stops operation and enters the STOP status. External outputs of the module follow
the "STOPRUN output mode" settings of parameters.
For details on parameters, refer to MELSEC iQ-F FX5 User's Manual (Application).
■Continuable error
When a continuable error occurs, the CPU module will keep the operation status and carry out operations.
Only continuable errors can be canceled. When a continuable error is canceled and the CPU module is restored, the CPU
module returns to the status before the occurrence of the error. Continuable errors can be canceled by either of the following
methods.
• Using engineering tools
• Using special relay (SM) (Page 124 Canceling Errors)
Operation settings of the CPU module on occurrence of an intelligent function module error
The operation of the CPU module on occurrence of an intelligent function module error can be set with the engineering tool.
Configure the settings with [I/O Assignment Settings] in the system parameters.
Error
status
Program
execution status
Description Required action
Major error Stop The module is unable to continue its operation due to a
hardware issue.
Perform troubleshooting. If the error still persists,
consult your local Mitsubishi Electric representative.
Moderate
error
Stop The module is unable to carry out programs or continue the
data communication with stations on the network due to
improper program or parameter settings and temporary noise.
To resume the execution of the program or the data
communication with the stations on the network, use
the engineering tool to identify the cause of the error
and take corrective actions.
Minor error Continue The module has detected a minor error or alarm. However, the
execution of the program and the data communication with the
stations on the network continues.
Check the details on the error with the engineering
tool. If necessary, take corrective actions for the error.