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Installation manual
CNC 8060
CNC 8065
3.
INTRODUCTION TO THE PLC.
(REF: 1402)
Operation of a timer.
3.5.1 Monostable mode. TG1 input.
In this operating mode, the status of the timer is maintained high (T=1) from when the TG1
input is activated until the indicated time period (constant) has elapsed.
With TEN=1 and TRS=0, the timer is activated with an up-flank at trigger input TG1. At that
moment, the timer status output (T) changes states (T=1) and the timing starts from ·0·.
Once the time period indicated by the time constant has elapsed, the timing is over. The
status output (T) changes (T=0) and the elapsed time t is maintained.
Any changes at the TG1 input (up or down-flank) while timing, has no effect.
Once the timing is over, an up-flank at trigger input TG1 is required to reactivate the timer.
Operation of the TRS input in this mode.
If an up-flank occurs at the TRS input while timing or after it, the PLC resets the timer setting
its status output low (T=0) and resetting its timing (t=0).
Since the timer is reset, its trigger input must be activated again to turn it back on.
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