WEST 8800 Operating Manual page 30

Process controller
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Configuration level
4.2 Configuration parameters
Cntr
Name
SP. F n
C. t YP
C. F nc
C. d if
mAn
C. A ct
FAIL
Configuration parameters
Value range Description
Basic configuration of setpoint processing
0
set-point controller can be switched over to external set-point
(-> LOGI/ SP. E )
8
standard controller with external offset (SP. E )
Calculation of the process value
0
standard controller (process value = x1)
1
ratio controller (x1/x2)
2
difference (x1 - x2)
3
Maximum value of x1and x2. It is controlled with the bigger
value. At sensor failure it is controlled with the remaining
actual value.
4
Minimum value of x1and x2. It is controlled with the smaller
value. At sensor failure it is controlled with the remaining
actual value.
5
Mean value (x1, x2). With sensor error, controlling is
continued with the remaining process value.
6
Switching between x1 and x2 (-> LOGI/ I. C hG)
7
O
function with constant sensor temperature
2
8
O
function with measured sensor temperature
2
Control behaviour (algorithm)
0
on/off controller or signaller with one output
1
PID controller (2-point and continuous)
2
∆ / Y / Off, or 2-point controller with partial/full load
switch-over
3
2 x PID (3-point and continuous)
4
3-point stepping controller
5
3-point stepping controller with position feedback Yp
6
continuous controller with integrated positioner
Output action of the PID controller derivative action
0
Derivative action acts only on the measured value.
1
Derivative action only acts on the control deviation
(set-point is also differentiated)
Manual operation permitted
0
no
1
yes (r LOGI / mAn)
Method of controller operation
0
inverse, e.g. heating
1
direct, e.g. cooling
Behaviour at sensor break
0
controller outputs switched off
1
y = Y2
2
y = mean output. The maximum permissible output can be
adjusted with parameter Ym. H . To prevent determination of
inadmissible values, mean value formation is only if the
control deviation is lower than parameter L. Y m.
30
8800 process controller
Default
0
0
1
0
0
0
1

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