Analog Comparator - Siemens LOGO! Manual

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4.4.18

Analog comparator

Short description
The output is set and reset depending on the difference Ax - Ay and on two configurable
thresholds.
Symbol in LOGO!
* AI1...AI8: 0...10 V corresponds with 0...1000 (internal value).
Gain and offset parameters
For more information on the gain and offset parameters, refer to topic "Calculating the gain
and offset of analog values (Page 117)".
LOGO!
Manual, 10/2017, A5E01248535-AA
Wiring Description
Inputs Ax and Ay You apply the analog signals the difference of which
you want to analyze at the inputs Ax and Ay.
Use the analog inputs AI1...AI8
AM1...AM6, the block number of a function with ana-
log output, or the analog outputs AQ1 and AQ2.
Parameter A: Gain
Range of values: ±10.00
B: Zero offset
Range of values: ±10,000
On: On threshold
Range of values: ±20,000
Off: Off threshold
Range of values: ±20,000
p: Number of decimals
Range of values: 0, 1, 2, 3
Output Q Q is set or reset, depending on the difference Ax - Ay
and the set thresholds..
LOGO! functions
4.4 Special functions list - SF
* , the analog flags
( )
165