Mitsubishi MELSEC-A series, Programming Manual

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APP - 3
APPENDICES
Table 1.1 Special Relay List (Continue)
Number Name Description Details Applicable CPU
M9030
0.1 second
clock
• 0.1 second, 0.2 second, 1 second, 2 second, and 1
minute clocks are generated.
• Not turned on and off per scan but turned on and
off even during scan if corresponding time has
elapsed.
• Starts with off when power is turned on or reset is
performed.
Unusable with
A3V.
M9031
0.2 second
clock
M9032 1 second clock
M9033 2 second clock
M9034 1 minute clock
M9036 Normally ON
• Used as dummy contacts of initialization and
application instruction in sequence program.
• M9036 and M9037 are turned on and off without
regard to position of key switch on CPU front.
M9038 and M9039 are under the same condition
as RUN status except when the key switch is at
STOP position, and turned off and on. Switched off
if the key switch is in STOP position. M9038 is on
for one scan only and M9039 is off for one scan
only if the key switch is not in STOP position.
Usable with all
types of CPU.
M9037 Normally OFF
M9038
On only for 1
scan after run
M9039
RUN flag
(off only for 1
scan after run)
M9040
PAUSE enable
coil OFF:PAUSE disabled
ON: PAUSE enabled
• When RUN key switch is at PAUSE position or
remote pause contact has turned on and if M9040
is on, PAUSE mode is set and M9041 is turned on.
Usable with all
types of CPU.
M9041
PAUSE status
contact OFF:Not during pause
ON: During pause
M9042
Stop status
contact
OFF:Not during stop
ON: During stop • Switched on when the RUN key switch is in STOP
position.
Usable with all
types of CPU.
M9043
Sampling trace
completion
OFF:During sampling
trace
ON: Sampling trace
completion
• Turned on upon completion of sampling trace
performed the number of times preset by
parameter after
instruction is executed.
Reset when instruction is executed.
Unusable with A1,
A1N, AnA, AnU
and QCPU-A
(A Mode).
M9044 Sampling trace
OFF ON:
Same as execution
ON
OFF:
Same as execution
• Turning on/off M9044 can execute /
instruction.
(M9044 is forcibly turned on/off by a peripheral
device.)
When switched from OFF to ON:
instruction
When switched from ON to OFF:
instruction
The value stored in D9044 is used as the condition
for the sampling trace.
At scanning, at time Time (10 msec unit)
Unusable with A1
and A1N.
M9045
Watchdog timer
(WDT) reset
OFF:WDT not reset
ON: WDT reset
• Turn on M9045 to reset the WDT upon execution
of a instruction or data communication
request batch process. (Use this function for scan
times exceeding 200 ms.)
Unusable with A1
and A1N.
0.05
seconds 0.05
seconds
0.1
seconds
0.1
seconds
0.5
seconds
0.5
seconds
1
second 1
second
30
seconds
30
seconds
ON
OFF
ON
OFF
ON
OFF
1 scan
ON
OFF
1 scan
STRA
STRAR
STRA
STRAR
STRA STRAR
STRA
STRAR
ZCOM