Scaling examples of analogue output:
Scaling example 1:
Indication range of the variable for heating
and cooling is -10.0 ... +10.0 V
with P43 = 10.0; P44 = 0.0; P45 = -10.0.
This is the standard setting.
Heating
performance
100%
0%
100%
Cooling
performance
-10 V 0 V +10 V
Analogue output
P 43
P 44
P 45
Fig. 5
Scaling example 2:
Indication range of the variable for heating is
+2.0 ... +10.0 V
with P43 = 10.0; P44 = 2.0; P45 = 2.0.
Heating
performance
Cooling
performance
100%
0%
100%
+2 V +10 V
Analogue output
P 43
P 44
P 45
Fig. 6
Scaling example 3:
Indication range of the variable for cooling is
–2.0 ... –8.0 V
with P43 = -2.0; P44 = -2.0; P45 = 8.0.
Heating
performance
Cooling
performance
100%
0%
100%
-8 V 0 V
Analogue output
P 43
P 44
P 45
Fig. 7
Notes concerning parameters P40 - P45:
If the reference variable is selected with
parameter P40, the parameters P41 and P42
are still adjustable, but without function. The
same applies to the parameters P43-P45, if
the actual value is selected with parameter
P40.
Summary of Contents for ST48-WHDVM.04
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