Busch-Jaeger Busch-ComfortTouch, Product Manual

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20.3.21 Subtractor details
20.3.21.1 Behaviour
The module subtracts the value of the
Input 1
from the value of the
Input 0
and outputs the re-
sult on the
Output 0
(
Input 0
-
Input 1
=
Output 0
).
If necessary, incoming values are converted into the internal data type of the module before the
subtraction (see conversion table below). Thus, observe the selection of a correct internal data
type!
The comparison is dependent on the internal data type of the module and is executed in the fol-
lowing way:
Internal data type Procedure Example
Number Mathematical addition 3 - 2 = 1
Time Calendrical addition 16:40 - 01:10 = 15:30
Date Calendrical addition 08.02.2009 - 03.00.0000 = 05.02.2009
20.3.21.2 Extended settings

Via the
Internal data type
parameter, you can specify the internal data type of
the module.

Via the
Only send with change
parameter, you can specify whether an output
value shall only be sent if the result of the calculation is different to the previ-
ously calculated result.
20.3.21.3 Conversion table
Boolean
(converted) Number
(converted) DPTTime
(converted) DPTDate
(converted) String
(converted)
Boolean ---
true
false
→
→
1
0 every va-
lue --
- Current
time Current
date true
false
→
→
"1"
"0"
Number 0
→
true --- every va-
→
Time of Date, if Text analo-