Installation manual
CNC 8035
PLC RESOURCES
Timers
6.
(SOFT M: V15.3X)
(S
OFT T: V16.3X)
·279·
6.5.4 Signal limiting mode. TG4 Input
In this operating mode, the timer status is kept high (T=1) from the moment the TG4 input is activated
until the time indicated by the time constant has elapsed or a down-flank occurs at input TG4.
If the timer is initialized with values TEN=1 and TRS=0, the timer will be activated when a leading
edge is produced at the TG4 input. At that moment, the timer status output (T) changes states (T=1)
and the timing starts from "0".
Once the time specified by the time constant has elapsed, timing will be considered as having
finished. The time status output (T) changes status (T=0) and the elapsed time will be kept as a timer
time value (T).
If, before the time specified by the time constant has elapsed, a trailing edge is produced in the trigger
input TG4, the PLC will consider that the timing operation has concluded it will deactivate the status
output (T=0) and maintain the value it has at that moment as the timer time value (T).
If, once the timing has concluded, it is required to activate the timer again, another leading edge
must be produced at the TG4 input.
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