Processing Performed By Q62Hlc At Error Occurrence - Mitsubishi Q Series User Manual

8 TROUBLESHOOTING

8.2 Processing Performed by Q62HLC at Error Occurrence

Status
Control output setting for CPU stop
error
PID continuation flag
At Q62HLC write error occurrence
At Q62HLC AT error completion
At Q62HLC hardware error occurrence
At programmable controller CPU stop
error occurrence
When programmable controller CPU is
switched from RUN to STOP
During programmable controller CPU
reset
DANGER
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The Q62HLC performs processing as explained below if an error occurs in the
Q62HLC/programmable controller CPU or when the programmable controller CPU is
switched from RUN to STOP.
Stop
Follows the operation to be performed at errors in Section 8.1 Error Code List.
Stops the operation and turns off external
output.
Follows stop mode
setting.
Does not perform external output, as module itself becomes inoperative.
• Do not write any data into the "read-only area" in the buffer memory of the intelligent
function module. In addition, do not turn on/off the "reserved" signals among the I/O
signals transferred to/from the programmable controller CPU.
Doing so may cause malfunction of programmable controller system.
• Be extremely careful when setting the PID continuation flag which controls the
external output.
• Abnormal output may be provided due to a failure of an output element or its internal
circuit.
Install an external monitoring circuit for the output signals which may lead to serious
accidents.
Processing
CLEAR
Continue
Continues the
operation and performs
external output.
MELSEC-Q
HOLD
Stop
Continues the
Follows stop mode
operation and performs
setting.
external output.
Continues the
Follows stop mode
operation and performs
setting.
external output.
Continue
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