Mitsubishi QJ71LP21 Reference Manual page 339

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
• The scan time of the initial execution
type program exceeded the initial
execution watch time specified in
the PLC RAS setting of the PLC
parameter dialog box.
• Standby system power-off occurred.
5000
• The tracking cable was
disconnected and reinserted without
the standby system being powered
off or reset.
• The tracking cable is not secured by
the connector fixing screws.
• The program scan time exceeded
the WDT value specified in the PLC
RAS setting of the PLC parameter
dialog box.
• Standby system power-off occurred.
5001 • The tracking cable was
disconnected and reinserted without
the standby system being powered
off or reset.
• The tracking cable is not secured by
the connector fixing screws.
• The program scan time exceeded
the constant scan time specified in
the PLC RAS setting of the PLC
parameter dialog box.
• The low speed program execution
time specified in the PLC RAS
setting of the PLC parameter dialog
5010
box exceeded the excess time of the
constant scan.
The program scan time exceeded the
constant scan time specified in the
PLC RAS setting of the PLC
parameter dialog box.
The scan time of the low speed
execution type program exceeded the
5011 low speed execution watch time
specified in the PLC RAS setting of the
PLC parameter dialog box.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
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Corrective Action
• Read the individual information of
the error with the peripheral device,
check its value (time), and shorten
the scan time.
• Change the initial execution watch
time or the WDT value in the PLC
RAS setting of the PLC parameter
dialog box.
• Resolve the endless loop caused by
jump transition.
• Since power-off of the standby
system increases the control system
scan time, re-set the WDT value,
taking the increase of the control
system scan time into consideration.
• When the tracking cable is
disconnected during operation,
securely connect it and restart. If the
same error is displayed again, the
cause is the hardware fault of the
tracking cable or CPU module.
(Contact your local Mitsubishi
representative, explaining a detailed
description of the problem.)
• Review the constant scan setting
time.
• Review the constant scan time and
low speed program execution time
in the PLC parameter so that the
margin time of constant scan may
be fully reserved.
• Review the constant scan time in the
PLC parameter so that the margin
time of constant scan may be fully
reserved.
Read the individual information of the
error using the peripheral device,
check the numerical value (time) there,
and shorten scan time if necessary.
Change the low speed execution
watch time in the PLC RAS setting of
the PLC parameter dialog box.
MELSEC-Q
Corresponding
CPU
QnA
Qn(H)
QnPH
QnPRH
QnA
Qn(H)
QnPH
QnPRH
Q00J/Q00/Q01
QnA
Qn(H)
QnPH
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