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Siemens 6ED1050-1AA00-0BE8 Manual De Usuario

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LOGO! functions 
 
4.4 Special functions list - SF 
LOGO! 
Manual, 04/2011, A5E03556174-01 
179
 
4.4.9 
Stairway 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 
time for the stairway lighting switch. 
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. 
4
7UJ
3DU
 
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