User Manual

LOGO! functions
4.4 Special functions list - SF
LOGO!
156 Manual, 06/2014, A5E33039675
View in parameter assignment mode (example):
4.4.10
Multiple function switch
Short description
The multiple function switch provides two different functions:
● Pulse switch with off-delay
● Switch (permanent lighting)
Symbol in LOGO!
Wiring
Description
Input Trg A signal at input Trg (Trigger) sets output Q
(permanent light) or resets Q with an off-delay. When
active, output Q can be reset with a signal at input
Trg.
Input R A signal at input R resets the current time T
a
and
resets the output.
Parameter T represents the off-delay time. LOGO! resets the
output (1 to 0 transition) when time T expires.
T
L
represents the time during which the output must
be set to enable the permanent light function.
T
!
represents the on-delay for the prewarning time.
T
!L
represents the length of the prewarning time
period.
Retentivity:
/ = No retentivity
R = The status is retentive.
Output Q A signal at Trg switches on output Q. Depending on
the leng
th of the input at Trg, the output is off again or
on permanently, or it is reset with a further signal at
Trg.