Mitsubishi Electric QJ71LP21 Reference Manual page 289

8 TROUBLESHOOTING
Error Code
Error Contents and Cause
*1
(SD0)
• 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 box
5010
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
5011 exceeded the low speed execution watch time specified in
the PLC RAS setting of the PLC parameter dialog box.
The control system and standby system in the redundant
system do not have the same programs and parameters.
In a redundant system, the control system and standby
system do not have the same programs and parameters.
The file type detected as different between the two
systems can be checked by the file name of the error
common information.
• The program is different.
(File name = ********.QPG)
• The PLC parameters/network parameters/redundant
parameters are different.
6000
(File name = PARAM.QPA)
• The remote password is different.
(File name = PARAM.QPA)
• The intelligent function module parameters are
different.
(File name = IPARAM.QPA)
• The device initial values are different.
(File name = ********.QDI)
• The capacity of each write destination within the CPU
for online pchange of multiple program blocks is
different.
(File name = MBOC.QMB)
In a redundant system, the valid parameter drive settings
6001
(SW2, SW3) made by the DIP switches are not the same.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.
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Corrective Action
• 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 setting time.
• 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.
Synchronise the programs and parameters of the control
system and standby system.
• Match the programs and parameters of the control
system and standby system.
• Perform PLC verify in either of the following procedures
1), 2) to clarify the differences between the files of the
two systems, then correct the wrong file, and write the
corrected file to the PLC again.
1) After reading the programs/parameters of System A
using GX Developer or PX Developer, verify them
with those of System B.
2) Verify the programs/parameters of GX Developer or
PX Developer saved in the offline environment with
those written to the CPU modules of both systems.
• When the capacity of each write destination within the
CPU for online change of multiple program blocks is
different between the two systems, take corrective
action 1) or 2).
1) Using the memory copy from control system to
standby system, copy the program memory from the
control system to the standby system.
2) Format the CPU module program memories of both
systems. (For the capacity of each write destination
within the CPU for online change of multiple
program blocks, set the same value to both
systems.)
Match the valid parameter drive settings (SW2, SW3) by
the DIP switches of the control system and standby
system.
MELSEC-Q
Corresponding CPU
QnA
Qn(H)
QnPH
Q00J/Q00/Q01
QnPRH
QnA
Qn(H)
QnPH
Q4AR
QnPRH
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