LOGO! functions

4.4 Special functions list - SF

4.4.6Edge triggered wiping relay

Short description

An input pulse generates a preset number of output pulses with a defined pulse/pause ratio (retriggerable), after a configured delay time has expired.

Symbol in LOGO!

Wiring

Description

 

 

Input Trg

A signal at input Trg (Trigger) triggers the times for

7UJ

 

 

the edge triggered wiping relay.

5

4

Input R

A signal at input R resets the current time (Ta) and

3DU

 

 

 

the output.

 

 

 

 

 

Parameter

The interpulse width TL and the pulse width TH are

 

 

 

configurable.

 

 

 

N determines the number of pulse/pause cycles

 

 

 

TL/TH:

 

 

 

Range of values: 1...9

 

 

 

Retentivity:

 

 

 

/ = No retentivity

 

 

 

R = The status is retentive.

 

 

Output Q

Q is set after TL has expired, and reset after TH has

 

 

 

expired.

Parameters TH and TL

Note the information on parameter T in topic Time response (Page 151).

The pulse width TH and the interpulse width TL 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)

If your LOGO! is a LOGO! 0BA7, you can additionally use the actual values of the following functions:

●Analog filter (0BA7 only) (Page 271) (actual value AQ)

●Average value (0BA7 only) (Page 276) (actual value AQ)

 

LOGO!

172

Manual, 04/2011, A5E03556174-01

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Image 172
Siemens 6ED1050-1AA00-0BE8 manual Edge triggered wiping relay, Tl/Th
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