Mitsubishi Electric QS001CPU User Manual page 187

12
TROUBLESHOOTING
(3) System clocks/counters
Number Name
SM400 Always ON
SM401 Always OFF
After RUN, ON
SM402
for 1 scan only
After RUN, OFF
SM403
for 1 scan only
0.1 second
SM410
clock
0.2 second
SM411
clock
SM412 1 second clock
SM413 2 second clock
2n second
SM414
clock
Table12.14 Special relay
Meaning
ON
• Normally is ON
OFF
ON
• Normally is OFF
OFF
ON
1 scan • After RUN, ON for 1 scan only.
OFF
ON
• After RUN, OFF for 1 scan only.
1 scan
OFF
0.05s
0.05s
• Repeatedly changes between ON and OFF at
0.1s
each designated time interval.
0.1s
• When programmable controller power supply is
turned ON or a CPU module reset is performed,
0.5s
0.5s
goes from OFF to start.
1s
1s
• This relay alternates between ON and OFF at
intervals of the time (unit: s) specified in SD414.
(If the value of SD414 is changed, the time that
has passed after the previous ON/OFF interval
of SM414 is counted as the next interval, and
the ON/OFF status is changed at the next
interval that is newly specified.)
Example: When the value of SD414 is changed
from 3 to 10.
ns
ns
SM414 OFF
SD414
• When programmable controller power supply is
turned ON or a CPU module reset is performed,
goes from OFF to start.
Explanation
The time that has passed after the
previous ON/OFF interval of SM414
is counted as the next interval.
3 ON 10
seconds seconds
3 10
seconds seconds
3 10
Change of the value
12.6 Special Relay List
Set by Corresponding
(When Set) CPU
S (Every END)
S (Every END)
S (Every END)
S (Every END)
S (Status change)
QS
S (Status change)
12
- 80
9
10
11
12