Mitsubishi Electric MELSEC iQ-F FX5UC Series, User Manual

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15 TROUBLESHOOTING
15.4 Error Status and Operations on Occurrence of an Error
15.4
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 continuation errors.
■ Stop error
When a stop error occurs, the CPU module stops operation and enters the STOP status.
For details on parameters, refer to

MELSEC iQ-F FX5 User's Manual (Application).
■
Continuation error
When a continuation error occurs, the CPU module will keep the operation status and perform operations.
Only continuation errors can be cleared. When a continuation error is cleared and the CPU module is restored, the CPU
module returns to the status before the occurrence of the error. Continuation errors can be cleared by either of the following
methods.
• Using engineering tools
• Using special relay (SM) (
 Page 259 Clearing Errors)
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 execute programs or continue the
data communications 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
communications 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 communications 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.