System Clock - Mitsubishi Electric MELSEC iQ-F Series Training Manual

When X2 turns on, Y1 turns on, or turns off. This flip-flop operation is repeated.
X2 T1
T0
X2 T0
X2
Contact T0
Contact T1
NC contact T0
Y1

System clock

The special relay about system clock is shown below.
No. Name
SM400 Always ON
SM401 Always OFF
SM402 After RUN, ON for one scan only
SM403 After RUN, OFF for one scan only
SM409 0.01 second clock
SM410 0.1 second clock
SM411 0.2 second clock
SM412 1 second clock
SM413 2 second clock
Description
ON
OFF
ON
OFF
ON
1 scan
OFF
ON
1 scan
OFF
0.005 s
0.005 s
0.05 s
0.05 s
0.1 s
0.1 s
0.5 s
0.5 s
1 s
1 s
47
OUT T0 K5
OUT T1 K5
Y1