Siemens LOGO! Series - Page 222

LOGO! functions
4.4 Special functions list - SF
LOGO!
222 Manual, 04/2011, A5E03556174-01
Configuration (example):
2II 
2Q 
%
3URWHFWLRQPRGH
2IIWKUHVKROG
2QWKUHVKROG
Press
S 
% 
$ 
%
'HFLPDOVLQWKHPHVVDJHWH[WLI
XVHG
2IIVHW
*DLQ
View in parameter assignment mode (example):
2II 
2Q 
%
2IIWKUHVKROG
2QWKUHVKROG
Press
ෙ 
$\ 
$[ 
%
4 GLIIHUHQWLDOYDOXH!2Q
7HPSHUDWXUH
YDOXHV
View in the message text (example):
$\ 
$[ 
Reducing the input response of the analog comparator
You can selectively delay the output of an analog comparator by means of the "On-delay"
and "Off-delay" special functions. With on-delay, output Q is only set if the pulse width of the
triggering signal at input Trg (=analog comparator output) is longer than the on-delay time.
Using this method, you will obtain a virtual hysteresis and reduce the input response to short
signals.