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Reference material
5.3 Special functions
LOGO!Soft Comfort Online Help
250 Operating Instructions, 11/2017
Timing diagram
Description of the function
A 0 to 1 transition at input Trg triggers the time T
H
.
If the status at input Trg is 1 for at least the duration of the configured time T
H
, LOGO! sets
the output to logical 1 upon expiration of this time (output is on-delayed to the input signal).
The time T
H
resets if the status at input Trg resets to 0 before this time has expired.
The 1 to 0 transition at the output triggers the time T
L
is triggered.
If the status at input Trg remains 0 at least for the duration of a configured time T
L
, the output
resets to 0 upon expiration of this time (output is off delayed to the input signal).
The time T
L
resets if the status at input Trg returns to 1 before this time has expired.
Special functions (Page 241)
5.3.1.4
Retentive on-delay
Short description
A one-shot at the input triggers a configurable time. LOGO! sets the output upon expiration
of this time.
Connection
Description
Input Trg
Trigger the on-delay time via the Trg (Trigger) input.
Input
R
Reset the on-delay time and reset the output to 0 via input
R
(Reset).
Reset takes priority over Trg.
Parameter
T is the on-delay time for the output (output signal transition 0 to 1).
Output Q
Q switches on upon expiration of the time T.
250


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