Mitsubishi Electric QJ71LP21 Reference Manual page 281

8 TROUBLESHOOTING
Error Code
Error Contents and Cause
*1
(SD0)
33 or more multiple CPU dedicated instructions were
executed from one CPU module.
4107
Numbers of execution to the CC-Link instruction are
beyond 32.
The CC-Link parameter is not set when the CC-Link
4108
instruction is executed.
With high speed interrupt setting execute PR/
4109 PRC,UDCNT1, UDCONT2, PLSY,
PWM,SPD,PLOADP,PUNLOADP,PAWPP instruction.
An attempt was made to perform write to the CPU shared
4111 memory write disable area of the host station CPU
module with the instruction.
The CPU module that cannot be specified with the
4112
multiple CPU dedicated instruction was specified.
Since the manual system switching enable flag (special
register SM1592) is OFF, manual system switching
4120
cannot be executed by the control system switching
instruction (SP. CONTSW).
• In the separate mode, the control system switching
instruction (SP. CONTSW) was executed in the standby
4121 system CPU module.
• In the debug mode, the control system switching
instruction (SP. CONTSW) was executed.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.
*12 : This applies to the CPU of function version B or later.
*15 : This applies to the CPU with the serial No. of which first 5 digits "04102" or later.
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Corrective Action
Using the multiple CPU dedicated instruction completion
bit, provide interlocks to prevent one CPU module from
executing 33 or more multiple CPU dedicated
instructions.
Set the numbers of execution to the CC-Link instruction to
32 or less.
Execute the CC-Link instruction after setting the CC-Link
parameter.
Delete the high-speed interrupt setting.
When using high-speed interrupt, delete the PR, PRC,
UDCNT1, UDCNT2, PLSY and PWM instructions.
Read the common information of the error using GX
Developer, and check and correct the error step
corresponding to that value (program error location).
To execute control system switching by the SP. CONTSW
instruction, turn ON the manual system switching enable
flag (special register SM1592).
• Reexamine the interlock signal for the SP. CONTSW
instruction, and make sure that the SP. CONTSW
instruction is executed in the control system only.
(Since the SP. CONTSW instruction cannot be
executed in the standby system, it is recommended to
provide an interlock using the operation mode signal or
like.)
• As the SP. CONTSW instruction cannot be executed in
the debug mode, reexamine the interlock signal related
to the operation mode.
MELSEC-Q
Corresponding CPU
*12
Q00/Q01
*12
Qn(H)
QnPH
QnA
*15
Qn(H)
*12
Q00/Q01
QnPRH
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