LOGO! functions

4.4 Special functions list - SF

4.4.9Stairway lighting switch

Short description

An input edge triggers a configurable and retriggerable time. The output is reset after this time has expired. A warning signal can be output before this time has expired to warn of the impending shutdown.

Symbol in LOGO!

Wiring

Description

 

 

 

 

 

 

 

 

 

Input Trg

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

7UJ

 

 

 

 

 

 

 

4

 

time for the stairway lighting switch.

 

 

 

 

 

 

 

 

3DU

 

 

 

 

 

 

 

 

Parameter

T represents the off-delay time of the output (output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signal transition 1 to 0).

 

 

 

 

 

 

 

 

 

 

T! determines the triggering time for the pre-warning.

 

 

 

 

 

 

 

 

 

 

T!L determines the length of the pre-warning signal.

 

 

 

 

 

 

 

 

 

 

Retentivity:

 

 

 

 

 

 

 

 

 

 

/ = No retentivity

 

 

 

 

 

 

 

 

 

 

R = The status is retentive.

 

 

 

 

 

 

 

 

 

Output Q

Q is reset after the time T has expired. A warning

 

 

 

 

 

 

 

 

 

 

signal can be output before this time has expired.

Parameter T, T! and T!L

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

The off-delay time T, the pre-warning time T! and the pre-warning 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)

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)

LOGO!

 

Manual, 04/2011, A5E03556174-01

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Image 179
Siemens 6ED1050-1AA00-0BE8 manual Stairway lighting switch, Parameter T, T! and T!L
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