Mitsubishi Electric MELSEC iQ-F Series Training Manual page 78

How to use retentive timers
When an input condition turns on, the coil turns on and the value of a retentive timer starts increasing. When the current value
becomes equal to a set value, the retentive timer goes timeout and the contact turns on. When the input condition turns off
during the addition, the coil turns off but the current value is held. When the input condition turns on again, the coil turns on
and the current value is used in the integration to continuously increase the value of the timer.
When using a retentive timer,
specify the number of points in
parameters in advance.
■Timing chart
The following describes the operation of when the retentive timer is set to ST0 to ST31.
1.
Double-click!
(To the next page)
X106
0 OUT ST1 K50
ST1
5 Y173
X107
7 RST ST1
END
12
Always use the RST instruction for turning off the contact
and clearing the current value after the retentive timer
goes timeout.
Contact X106
Coil ST1
3.0
Normally open
seconds
contact ST1
Contact X107 (for inputting
the RST instruction)
Current value
0
of ST1
4 SEQUENCE INSTRUCTIONS AND BASIC INSTRUCTIONS -PART 1-
4.3 Measuring Timers (Timer, High-speed Timer, Retentive Timer)
Project name
Program name
2.0
seconds
3 3 5 5 0
1.
Double-click "Parameter" in the "Project" view.
Retentive timer
MAIN
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