Siemens LOGO! - Reducing the Input Response of the Analog Comparator

LOGO! Manual
A5E00380835-01
192
Press
B3 2
Ax =+00010
Ay =–00020
n =+00030
Q = 1 (differential value > On)
Temperature values
View in the message text (example):
Ax =+00010
Ay =–00020
Reducing the input response of the analog comparator
You can selectively delay the output of an analog compara-
tor 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.
Function block diagram
Q1
AI
nA
AI
AI1
AI2
B1
B2
B3
Analog comparator
On-delay
Off-delay
LOGO! functions