LOGO! functions

4.4 Special functions list - SF

4.4.4Retentive on-delay

Short description

A one-shot at the input triggers a configurable on-delay time. The output is set when this time has expired.

Symbol in LOGO!

Wiring

Description

 

 

 

 

 

 

 

 

 

 

Input Trg

A signal at input Trg (Trigger) triggers the on-delay

7UJ

 

 

 

 

 

 

 

 

 

 

timer.

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

4

Input R

A signal at input R resets the on-delay time and the

3DU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

output.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

T represents the on-delay time for the output (output

 

 

 

 

 

 

 

 

 

 

 

status transition 0 to 1).

 

 

 

 

 

 

 

 

 

 

 

Retentivity:

 

 

 

 

 

 

 

 

 

 

 

/ = no retentivity

 

 

 

 

 

 

 

 

 

 

 

R = The status is retentive.

 

 

 

 

 

 

 

 

 

 

Output Q

Q is set after the time T has expired.

Parameter T

Note the defaults specified in topic Time response (Page 151).

The time for parameter T 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)

●Max/Min (0BA7 only) (Page 273) (actual value AQ)

●On-delay(Page 160) (current time Ta)

●Off-delay(Page 164) (current time Ta)

●On-/off-delay(Page 166) (current time Ta)

 

LOGO!

168

Manual, 04/2011, A5E03556174-01

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Image 168
Siemens 6ED1050-1AA00-0BE8 manual Retentive on-delay, Parameter T
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