LOGO! functions

4.4 Special functions list - SF

4.4.10Multiple function switch

Short description

Switch with 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

7UJ

 

 

 

 

 

 

 

 

 

 

 

(permanent light) or resets Q with an off-delay. When

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

4

 

active, output Q can be reset with a signal at input

3DU

 

 

 

 

 

 

 

 

 

 

 

Trg.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input R

A signal at input R resets the current time Ta and

 

 

 

 

 

 

 

 

 

 

 

 

resets the output.

 

 

 

 

 

 

 

 

 

 

 

Parameter

T represents the off-delay time. The output is reset (1

 

 

 

 

 

 

 

 

 

 

 

 

to 0 transition) when time T expires.

 

 

 

 

 

 

 

 

 

 

 

 

TL 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 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.

Parameters T, TL,T! and T!L

Note the defaults of the T parameters listed in topic Time response (Page 151).

The off-delay time T, the permanent light time TL, the on-delay prewarning time T! and the prewarning time period T!L can be provided by the actual value of another already- 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

LOGO! Manual, 04/2011, A5E03556174-01

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Image 182
Siemens 6ED1050-1AA00-0BE8 manual Multiple function switch, Parameters T, TL,T! and T!L
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