Rievtech ELC-12AC-R-N, User Manual

Page: 95 / 393

95
to chapter 5.2.2 please.
Timing diagram
Changing the time base
You can change the pre-warning time base and the period.
Description of the function
Output Q is set to 1 with a 0 to 1 signal transition at input Trg. The 1 to 0 transition at input Trg triggers
the current time and output Q remains set.
Output Q is reset to 0 when Ta reaches the time T. Before the off delay time (T - T
!
) has expired, you can
output a pre-warning that resets Q for the duration of the off pre-warning time T
!L
.
Ta is retriggered (optional) at the next high/low transition at input Trg and if Ta is expiring.
If retentivity is not set, output Q and the expired time are reset after a power failure.
Setting the Par parameter
Note
All times must have the same time base.
View in parameter assignment mode (example):
Time base
T
Pre-warning time Pre-warning
period
Seconds 750 ms 50 ms
Minutes 15 s 1 s
Hours 15 min 1 min
* makes sense only for programs with a cycle time of < 25 ms