Stairway Lighting Switch - Siemens Logo! Manual

4.4.9

Stairway lighting switch

Short description
An input edge triggers a configurable and retriggerable
time. The output is reset after this time has expired. A
warning signal can be output before this time has expired
to warn of the impending shutdown.
Symbol in
LOGO!
Timing diagram
Trg
Q
LOGO! Manual
A5E00380835-01
Wiring
Input Trg
Parameter
Output Q
T
!L
T is busy
T
a
T
LOGO! functions
Description
A signal at input Trg (Trig-
ger) triggers the off-delay
time for the stairway lighting
switch.
T represents the off-delay
time of the output (output
signal transition 1 to 0).
T determines the triggering
!
time for the pre-warning.
T determines the length of
!L
the pre-warning signal.
Retentivity:
/ = No retentivity
R = The status is retentive.
Q is reset after the time T
has expired. A warning sig-
nal can be output before
this time has expired.
!
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