User`s manual

Error code list Troubleshooting
MELSEC System Q, Hardware 11 – 85
11.3.6 Error code list (6000 to 6999)
Error
code
Error contents and cause Corrective action
LED status
CPU
status
Corre-
sponding
CPU
RUN ERR.
6000
FILE DIFF.
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.
(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 pro-
gram blocks is different.
(File name = MBOC.QMB)
(This can be detected from the standby sys-
tem of the redundant system.)
 Collateral information

Common Information: File name
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/At tracking cable connec-
tion/At changing to backup mode/At completion
of write during RUN/At Switching execution/At
switching both systems into RUN
– Match the programs and parameters of the
control system and standby system.
– Verify the systems by either of the following
procedures 1), 2) to clarify the differences
between the files of the two systems, then
correct a wrong file, and execute "Write to
PLC" again.
1) After reading the programs/parameters of
System A using GX (IEC) Developer or PX
Developer, verify them with those of Sys-
tem B.
2) Verify the programs/parameters of GX
(IEC) 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 sys-
tem to standby system, copy the program
memory from the control system to the
standby system.
2) Format the CPU module program memo-
ries 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.)
OFF Flicker Stop QnPRH
6001
FILE DIFF.
In a redundant system, the valid parameter drive
settings (SW2, SW3) made by the DIP switches
are not the same.
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/At reset/At tracking cable connec-
tion/At operation mode change
Match the valid parameter drive settings (SW2,
SW3) by the DIP switches of the control system
and standby system.
OFF Flicker Stop QnPRH
6010
OPE. MODE DIFF.
The operational status of the control system and
standby system in the redundant system is not
the same.
(This can be detected from the standby system
of the redundant system.)
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
Always
Synchronise the operation statuses of the con-
trol system and standby system.
ON ON Continue QnPRH
6020
OPE. MODE DIFF.
At power ON/reset, the RUN/STOP switch set-
tings of the control system and standby system
are not the same in a redundant system. (This
can be detected from the control system or
standby system of the redundant system.)
 Collateral information

Common Information: —
 Individual Information: —
 Diagnostic Timing
At power ON/At reset
Set the RUN/STOP switches of the control sys-
tem and standby system to the same setting.
OFF Flicker Stop QnPRH
Tab. 11-8: Error code list (6000 to 6999) for PLC CPUs of MELSEC System Q