Multiple Function Switch - Siemens LOGO! Series Manual

LOGO! functions
4.4 Special functions list - SF
4.4.10

Multiple function switch

Short description
Switch with two different functions:
● Pulse switch with off-delay
● Switch (permanent lighting)
Symbol in LOGO!
Parameters T, T ,T and T
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Note the defaults of the T parameters listed in topic Time response (Page 151).
The off-delay time T, the permanent light time T
prewarning time period T
programmed function. You can use the actual values of the following functions:
● Analog comparator (Page 218) (actual value Ax – Ay)
● Analog threshold trigger (Page 213) (actual value Ax)
● Analog amplifier (Page 226) (actual value Ax)
● Analog multiplexer (Page 248) (actual value AQ)
● Analog ramp (Page 251) (actual value AQ)
● Mathematic instruction (Page 265) (actual value AQ)
● PI controller (Page 256) (actual value AQ)
● Up/down counter (Page 201) (actual value Cnt)
182
Wiring
Input Trg
Input R
Parameter
Output Q
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can be provided by the actual value of another already-
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Description
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.
A signal at input R resets the current time T
resets the output.
T represents the off-delay time. The output is reset (1
to 0 transition) when time T expires.
T represents the time during which the output must
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be set to enable the permanent light function.
T represents the on-delay for the prewarning time.
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T represents the length of the prewarning time
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period.
Retentivity:
/ = No retentivity
R = The status is retentive.
A signal at Trg switches on output Q. Depending on
the length of the input at Trg, the output is switched
off again or switched on permanently, or it is reset
with a further signal at Trg.
, the on-delay prewarning time T
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Manual, 04/2011, A5E03556174-01
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and the
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LOGO!