Operation Cycle (Scan Time) Monitor [D8010 To D8012]; Internal Clock [M8011 To M8014] - Mitsubishi Electric MELSEC-Q Structured Programming Manual

FXCPU Structured Programming Manual
[Device & Common]
4.2.5

Operation cycle (scan time) monitor [D8010 to D8012]

D8010 to D8012 store the current value, minimum value and maximum value of the PLC scan time
respectively (in units of 0.1 ms).
When the constant scan function is used, the scan time is as follows:
FX /FX /FX
1S 1N 1NC
time for constant scan.
FX /FX /FX /FX
0S 0 0N
D8010 : Current value
D8011 : Minimum value
D8012 : Maximum value
4.2.6

Internal clock [M8011 to M8014]

The PLC has the following four types of internal clocks which are always oscillating while the PLC power is
ON.
10ms
M8011
(10ms) 100ms
M8012
(100ms)
M8013
(1 sec)
M8014
(60 sec)
4.2 Supplement of Special Devices (M8000 and later and D8000 and later)
/FX /FX /FX /FX /FX
2N 2NC 3S 3G
/FX PLCs: The scan time does not include the waiting time for constant scan.
U 2C
These values can be monitored from
peripheral equipment.
100Hz
Caution:
Internal clocks are always oscillating even while the PLC is in
the STOP mode. Accordingly, the rising edge of the RUN monitor
10Hz
(M8000) does not synchronize with the clock start timing.
1Hz
1s
1min
4 Operations of Special Devices (M8000 and later, D8000 and later)
/FX /FX PLCs: The scan time includes the waiting
3GC 3U 3UC
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