Mitsubishi Electric MELCEC Q Series User Manual page 58

4. CPU MODULE
Diagnostic Item
RAM check
Operation circuit check
Watchdog error supervision
END instruction not executed
Main CPU check
Memory card error
Module verify 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
assignment error
Special module access error
*1 (Default: STOP)
Link parameter error
Low battery
Operation error *1 (Default: RUN)
Self-diagnostics list (continued)
Diagnostic Timing
• When switching on or resetting
• When M9084 is on during STOP
• When END instruction is executed
• When switching on or resetting
• When END instruction is executed
• When END instruction is executed
Always
• When END instruction is executed
• When power is on
When END instruction is executed
(However, not checked when M9084 is on.)
When END instruction is executed
(However, not checked when M9084 is on.)
When FROM/TO instruction are executed
and bus error occurs
When FROM/TO instruction are executed
• When switching on or resetting
•
When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
When interruption occurs
• When switching on or resetting
•
When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
When FROM/TO instruction are executed
• When switching on or resetting
•
When switching from (STOP, PAUSE) to
(RUN, STEP RUN)
Always
(However, not checked when M9084 is on.)
When each instruction is executed
*1 Can be changed by the parameter settings of the peripheral devices.
*2 Displayed as a three-digit trouble code only for errors with the "CHK" instruction.
CPU Module Status of
Status RUN LED
Stop Flickering
Flickering/
Stop/Run
Stop Flickering
Flickering/
Stop/Run
Run On
Run On
Flickering/
Stop/Run
4 - 12
Error Code
Error Message
RAM ERROR
OPE.CIRCUIT ERR.
WDT ERROR
END NOT EXECUTE
MAIN CPU DOWN
MEMORY CARD ERR.
UNIT VERIFY ERR.
On
FUSE BREAK OFF
CONTROL-BUS ERR.
SP.UNIT DOWN
LINK UNIT ERROR
I/O INT.ERROR
SP.UNIT LAY.ERR.
SP.UNIT ERROR
On
LINK PARA.ERROR
BATTERY ERROR
*2
OPERATION ERROR
On
[<CHK> ERROR ]
(D9008)
20
21
22
24
26, 60, 61
16
31
32
40
41
42
43
44
46
47
70
50