Mitsubishi MELSEC-A A2USHCPU-S1 User Manual page 69

4. CPU MODULE
Diagnosis item
Instruction code check
Parameter setting check
No END instruction
Unable to execute instruction
Format (CHK instruction) check
Unable to execute instruction
RAM check
Operation circuit check
Watchdog error supervision
END instruction not executed
Main CPU check
Module verification error
*1 (Default: stop)
Fuse blown
*1 (Default: stop)
Control bus check
Special function module error
Link module error
I/O interrupt error
Special function module
allocation error
Special module access error
*1 (Default: stop)
Link parameter error
Low battery
Operation error
*1 (Default: stop)
Self-diagnostics list
Diagnosis timing
Upon execution of each instruction
• When switching ON or resetting
• When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
• When M9056 or M9057 is ON
• When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
•
CJ SCJ JMP CALL(P) FOR to NEXT
• Upon execution of each instruction
• When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
• When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
• When interruption occurred
• When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
• When switching ON or resetting
• When M9084 is ON during STOP
• When switching ON or resetting
• Upon execution of END instruction
• Upon execution of END instruction
Always
Upon execution of END instruction
(However, not checked when M9084 is ON.)
Upon execution of END instruction
(However, not checked when M9084 is ON.)
Upon execution of FROM, TO instruction
Upon execution of FROM, TO instruction
• When switching ON or resetting
• When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
When interruption occurs
• When switching from (STOP, PAUSE) to
(RUN, STEP-RUN)
Upon execution of FROM, TO instruction
• When switching from (STOP, PAUSE) to
(RUN, STEP-RUN)
Always
(However, not checked when M9084 is ON.)
Upon execution of each instruction
*1 Can be changed by the parameter settings of the peripheral devices.
*2 Indicated as a three-digit trouble code only for errors with the "CHK" instruction.
4 - 16
CPU module Status of
status "RUN" LED
INSTRCT CODE ERR.
PARAMETER ERROR
MISSING END INS.
Stop Flickering
CAN'T EXECUTE(P)
CHK FORMAT ERR.
CAN'T EXECUTE(I)
RAM ERROR
OPE.CIRCUIT ERR.
Stop Flickering
WDT ERROR
END NOT EXECUTE
MAIN CPU DOWN
UNIT VERIFY ERR.
Flickering/
Stop/Operate
ON
FUSE BREAK OFF
CONTROL-BUS ERR.
SP.UNIT DOWN
LINK UNIT ERROR
Stop Flickering
I/O INT.ERROR
SP.UNIT LAY.ERR.
Flickering/
Stop/Operate SP.UNIT ERROR
ON
Operate ON LINK PARA.ERROR
Operate ON BATTERY ERROR
Flickering/ OPERATION ERROR
Stop/Operate
ON
[<CHK> ERROR
Contents of error Error code
indication (D9008)
10
11
12
13
14
15
20
21
22
24
26
31
32
40
41
42
43
44
46
47
70
*2
50
]