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Configuration level
Parameters to be adjusted:
( PArA / Cntr)
4.4.3 Switching attitude non-linear ( CyCl= 2 )
With this method, the cooling power
is normally much higher than the
heating power, i.e. the effect on the
behaviour during transition from
heating to cooling may be negative.
The cooling curve ensures that the
control intervention with 0 to -70%
correcting variable is very weak.
Moreover, the correcting variable increases very quickly to max. possible
cooling. Parameter F. H 2O can be used for changing the characteristic curve. The
standard method (see section 4.4.1) is also used for heating. Cooling is also
enabled dependent of process temperature .
70
60
50
40
30
20
10
0
-100
-95
Parameters to be adjusted:
( PArA / Cntr)
Switching behaviuor
E. H 2O: minimum temperature for water cooling
t. o n:
t. o ff: minimum pause water cooling
Water cooling non-linear,
Water cooling non-linear,
Water cooling non-linear,
Water cooling linear
-90
-85
-80
-75
-70
-65
F. H 2O: adaptation of (non-linear) characteristic
t. o n:
t. o ff: min. pause water cooling
E. H 2O: min. temperature for water cooling
pulse duration water cooling
t. o n
F. H 2O
=1
F. H 2O
=2
F. H 2O
=0,5
-60
-55
-50
-45
-40
-35
-30
Controller output [%]
Water cooling
Pulse duration water cooling
50
t. o ff
Parameter:
t. o n = 0.4 sec
t. o ff = 0.2 sec
-25
-20
-15
-10
-5
8800 process controller
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