LOGO! functions

4.4 Special functions list - SF

4.4.2Off-delay

Short description

When an on-delay is set, the output is reset when the configured time has expired.

Symbol in LOGO!

Wiring

Description

 

 

 

 

 

 

 

 

 

 

Input Trg

The off-delay timer starts with a negative edge (1 to 0

7UJ

 

 

 

 

 

 

 

 

 

 

transition) at input Trg (Trigger)

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

4

Input R

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

3DU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

output.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

The output switches off (transitions from1 to 0) when

 

 

 

 

 

 

 

 

 

 

 

the delay time T expires.

 

 

 

 

 

 

 

 

 

 

 

Retentivity:

 

 

 

 

 

 

 

 

 

 

 

/ = No retentivity

 

 

 

 

 

 

 

 

 

 

 

R = The status is retentive.

 

 

 

 

 

 

 

 

 

 

Output Q

Q is set with a signal at input Trg. It holds this state

 

 

 

 

 

 

 

 

 

 

 

until T has expired.

Parameter T

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

The time for parameter T can be based on the actual value of another, already-configured function. You can use the actual value 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) (0BA7 only) (actual value AQ)

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

On-delay(Page 160) (current time Ta)

Off-delay (current time Ta)

On-/Off-delay(Page 166) (current time Ta)

 

LOGO!

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Manual, 04/2011, A5E03556174-01

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Image 164
Siemens 6ED1050-1AA00-0BE8 manual Off-delay, Short description

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