User Manual

8.2 Comparator
Comparator 1
Comparator 2
The comparator helps compare two analog input signals.
Purpos
e
T
wo comparators are available:
If differential value (A - B) between input A and B:
Functio
n principle
– Is greater than "Limit value on", the comparator turns on.
– Is smaller than "Limit value off", the comparator turns off.
A should (normally) be greater than B, as the difference (A – B) is evaluated with
preceding sign, and the limit values cannot be set negative.
Note
A
- B
On
Min. switch-on and switch-off times can be set for the output signal of the
comparator along with a switch-on and switch-off delay.
These adjustable times are always active (except during wiring tests).
8.2.1 Activate comparator
Assign an input to activate the comparator.
Main menu > Commissioning > Extra configuration > Aggregates > Logic functions >
Comparator 1...2 >
Config
uration
Operating lin
e Adjustable values / Comment Factory setting
Switching value A ---, X1, X2, ... (analog inputs only)
Switching value B ---, X1, X2, ... (analog inputs only)
Comparator relay ---, N.Q1, N.Q2, ... (free outputs only)
Time format h:m, m:s m:s
 You can select format "Hours:Minutes" as an extended time format (> 59.59 m.s)
for the comparator.
Important: The changeover impacts all time-related parameters of the
comparator (switch-on/off delay and min. switch-on/off time).
Notes
 Time format "h:m" offers a 10-minute increment setting range.
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Aggregates 01.04.2010