Appendix 1.7 List Of Error Codes (5000 To 5999) - Mitsubishi Electric Q26UD(E)HCPU User Manual

Appendix 1.7
The following table shows the error messages, the error contents and causes, and the corrective actions for the error
codes (5000 to 5999).
Error
Error and cause
code
[WDT ERROR]
The scan time of the initial execution type program
exceeded the initial execution monitoring time
specified in the PLC RAS tab of "PLC Parameter".
■Collateral information
• Common information: Time (value set)
• Individual information: Time (value actually
measured)
■Diagnostic timing
• Always
5000
[WDT ERROR]
• The power supply of the standby system is
turned OFF.
• The tracking cable is disconnected or connected
without turning off or resetting the standby
system.
• The tracking cable is not secured by the
connector fixing screws.
■Collateral information
• Common information: Time (value set)
• Individual information: Time (value actually
measured)
■Diagnostic timing
• Always
[WDT ERROR]
The scan time of the program exceeded the WDT
value specified in the PLC RAS tab of "PLC
Parameter".
■Collateral information
• Common information: Time (value set)
• Individual information: Time (value actually
measured)
■Diagnostic timing
• Always
5001
[WDT ERROR]
• The power supply of the standby system is
turned OFF.
• The tracking cable is disconnected or connected
without turning off or resetting the standby
system.
• The tracking cable is not secured by the
connector fixing screws.
■Collateral information
• Common information: Time (value set)
• Individual information: Time (value actually
measured)
■Diagnostic timing
• Always
List of error codes (5000 to 5999)
Corrective action
• Read the individual information of the error
using the programming tool to identify the
numeric value (time). Check the value and
shorten the scan time.
• Change the initial execution monitoring
time or the WDT value in the PLC RAS tab
of "PLC Parameter".
• Resolve the endless loop caused by jump
transition.
• If the error persists even after the actions
mentioned above are taken, the possible
cause is a hardware failure of the system.
Please consult your local Mitsubishi
representative.
• Since power-off of the standby system
increases the control system scan time,
reset the WDT value, taking the increase of
the control system scan time into
consideration.
• If the tracking cable was disconnected
during operation, securely connect it and
restart the CPU module. If the same error
code is displayed again, the cause is a
hardware failure of the tracking cable or
CPU module. Please consult your local
Mitsubishi representative.
• Read the individual information of the error
using the programming tool to identify the
numeric value (time). Check the value and
shorten the scan time.
• Change the initial execution monitoring
time or the WDT value in the PLC RAS tab
of "PLC Parameter".
• Resolve the infinite loop caused by jump
sequence.
• Check the execution number of the
interrupt program, and reduce the
occurrence number of interruption.
• If the error persists even after the actions
mentioned above are taken, the possible
cause is a hardware failure of the system.
Please consult your local Mitsubishi
representative.
• Since power-off of the standby system
increases the control system scan time,
reset the WDT value, taking the increase of
the control system scan time into
consideration.
• If the tracking cable was disconnected
during operation, securely connect it and
restart the CPU module. If the same error
code is displayed again, the cause is a
hardware failure of the tracking cable or
CPU module. Please consult your local
Mitsubishi representative.
APPENDICES
LED status, Corresponding
CPU status CPU
Qn(H)
QnPH
QnPRH
QnU
LCPU
RUN: Off
ERR.:Flashing
CPU Status:Stop
QnPRH
QCPU
LCPU
RUN: Off
ERR.:Flashing
CPU Status:Stop
QnPRH
A
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