Download Type A1FXCPU Module User`s Manual (Function description)

2. PERFORMANCE
MELSEC-A
Tale 2.2 Self-Diagnosis List
Diagnosis
Instruction code check
Parameter setting check
No END instruction
Memory error
Instruction execution
disable
Format (CHK) check
Instruction execution
disable
RAM check
CPU error
I/O error
Special
function
module error
Operation circuit check
CPU
Status
RUN LED
Status
• When that instruction is executed
• When power is switched on or
CPU is reset
• When (STOP/PAUSE) is switched
to (RUN)
• When (STOP/PAUSE) is switched
to (RUN)
• When CJ, SCJ, JMP, CALL(P) or
FOR-NEXT instruction is executed
• When (STOP/PAUSE) is switched
to (RUN)
• When (STOP/PAUSE) is switched
to (RUN)
• When interrupt occurs
• When (STOP/PAUSE) is switched
to (RUN)
• When power is switched on or
CPU is reset
• When M9084 is switched on in
STOP mode
• When power is switched on or
CPU is reset
Watchdog error monitor
• When END instruction is executed
END instruction not
executed
• When END instruction is executed
Stop
Stop
Error Display of
Peripheral
Error
Code
INSTRCT CODE ERR.
10
PARAMETER ERROR
11
MISSING END INS.
12
CAN'T EXECUTE (P)
13
CHK FORMAT ERR.
14
CAN'T EXECUTE (I)
15
RAM ERROR
20
OPE CIRCUIT ERR.
21
WDT ERROR
22
END NOT EXECUTE
24
Flicker
Flicker
Endless loop execution
• Always
WDT ERROR
25
Main CPU check
• Always
MAIN CPU DOWN
26
I/O module verify
(Default: Stop)
• When END processing is executed Stop
(Not checked when M9084 is on)
UNIT VERIFY ERR.
31
Power off
(Default: Continuation)
• When END processing is executed
(Not checked when M9084 is on)
FUSE BREAK OFF
32
Control bus check
• When FROM/TO instruction is
executed
CONTROL BUS ERR.
40
Special function module
error
• When FROM/TO instruction is
executed
SP. UNIT DOWN
41
I/O interrupt error
• When interrupt occurs
I/O INT. ERROR
43
Special function module
assignment error
• When power is switched on or
CPU is reset
• When (STOP/PAUSE) is switched
to (RUN)
SP. UNIT LAY ERR.
44
Special function module
access error
(Default: Stop)
• When FROM/TO instruction is
executed
SP. UNIT ERR.
46
Link parameter error
Battery
Diagnosis Timing
Battery error
Operation error
(Default : Continuation)
• When power is switched on or
CPU is reset
• When (STOP/PAUSE) is switched
to (RUN)
• Always
(Not checked when M9084 is on)
• When corresponding instruction is
executed
2-7
Flicker
Run
Stop
On
Flicker
Flicker
Stop
On
Run
Run
On
LINK PARA ERROR
47
Run
On
BATTERY ERROR
70
OPERATION ERROR
50
Flicker
Stop
Run
On