3 ks90-1 cooling functions 43, 1 standard ( cycl= 0 ) 43, Constant period 43 – West Control Solutions KS 92-1 Programmer manual User Manual
Page 43: Standard 43, 3 ks90-1 cooling functions, Configuration level
4.3 KS90-1 cooling functions
With these controllers, configuration parameter
CYCL (ConF/ Cntr/ CYCL)
can be used for matching the cycle time of 2-point and 3-point controllers. Selec-
tion between “standard” (
CyCl= 0) and “with constant cycle” (CyCl= 3) is
possible.
4.3.1 Standard (
CyCl= 0 )
The adjusted cycle times
t1 and t2 are valid for 50% or -50% correcting vari-
able. With very small or very high values, the effective cycle time is extended to
prevent unreasonably short on and off pulses. The shortest pulses result from ¼
x
t1 or ¼ x t2. The characteristic curve is also called “bath tub curve”
Parameters to be adjusted:
t1 :min. cycle time 1 (heating) [s]
(
PArA/ Cntr)
t2 : min. cycle time 2 (cooling) [s]
4.3.2 Heating and cooling with constant period (
CyCl= 3 )
1 and
t2 are met in the overall out-
put range . To prevent unreasonably
short pulses, parameter
tp is used
for adjusting the shortest pulse dura-
tion. With small correcting values
which require a pulse shorter than the
value adjusted in
tp, this pulse is
suppressed. However, the controller
stores the pulse and totalizes further
pulses, until a pulse of duration
tp
can be output.
Parameters to be adjusted:
t1 : Min. cycle time 1 (heating) [s]
(
PArA/ Cntr)
t2 : min. cycle time 2 (cooling) [s]
tp:
min. pulse length [s]
Configuration level
KS 90-1
p / KS 92-1
p
43
KS90-1 cooling functions
0,0
1,0
2,0
3,0
4,0
5,0
6,0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
Controller output [%]
relative
cycle
duration
T / T
1
t1
2 x
t1
3 x
t1
4 x
t1
50%
50%
t1 t2
/
tp
tp
30%
70%
20%
80%
10%
90%
t1 t2
/