User's Manual

LOGO! functions
4.4 Special functions list - SF
LOGO!
230 Manual, 04/2011, A5E03556174-01
Status diagram
Par Q
n-1
S R Trg Q
n
* 0 0 0 0 0
* 0 0 0 0 ->1 1**
* 0 0 1 0 0
* 0 0 1 0 ->1 0
* 0 1 0 0 1
* 0 1 0 0 ->1 1
RS 0 1 1 0 0
RS 0 1 1 0 ->1 0
SR 0 1 1 0 1
SR 0 1 1 0 ->1 1
* 1 0 0 0 1
* 1 0 0 0 ->1 0**
* 1 0 1 0 0
* 1 0 1 0 ->1 0
* 1 1 0 0 1
* 1 1 0 0 ->1 1
RS 1 1 1 0 0
RS 1 1 1 0 ->1 0
SR 1 1 1 0 1
SR 1 1 1 0 ->1 1
*: RS or SR
**: Triggering signal is effective, because S and R = 0.
Depending on your configuration, either input R takes priority over input S (input S is not
effective when R = 1), or vice versa (input R is not effective when S = 1).
After a power failure, the pulse relay and output Q are reset if you have not enabled
retentivity.
View in programming mode:
3DU 56
%5
3DU 65
%5
3UHVV
Ⴃ
RU
Ⴍ
This special function is not available in parameter assignment mode.
Note
If Trg = 0 and Par = RS, the special function "Pulse relay" corresponds with the special
function "
Latching relay (Page 228)".