bürkert POSITIONER 1067 Bedienungsanleitung Seite 86

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4 OPERATION
TV: (rate time)
Range of settings: 0.0...999.9 (factory setting: 0)
X0: (Operating point of process controller)
Range of settings: 0...100% (factory setting: 0%)
DBD: No sensibility range of the process controller
Range of settings: 0,2...5% (factory setting: 0,5 %)
SCALE: Scales the inputs of the process controller.
DP: Decimal point position
Range of settings: 0 ... 3 (factory setting 0)
PV-L: Lower scale value for actual process value. It is assigned to the smallest current
or voltage value of the standard signal.
Range of settings: -99.9...990.0 (factory setting: 0.0)
PV-H: Upper scale value for actual process value. It is assigned to the greatest current
or voltage value of the standard signal.
Range of settings: -90.0...999.9 (factory setting: 100.0)
SP-L: Lower scale value for desired process value (setpoint). It is assigned to the
smallest current or voltage value of the standard signal. (Applies only with the setting
SETPOINT EXTERN).
Range of settings: -99.9...990.0 (factory setting: 0.0)
SP-H: Upper scale value for desired process value (setpoint). It is assigned to the
greatest current or voltage value of the standard signal. (Applies only with the setting
SETPOINT EXTERN).
Range of settings: -90.0...999.9 (factory setting: 100.0)
Example of scaling: (fig. 37)
Actual process value via transmitter:
Desired process value from SPC:
Fig. 34 Example of scaling
Scaling value (l/min)
Actual
process value
Standard signal (mA)
The input of large scale values increases display precision.
The amplification (KP) of the process controller relates to the set scale values.
With SETPOINT INTERN (desired values preset via the arrow keys) no scaling of the desired value
(SP-L, SP-H) is possible. It can be entered directly in correspondence with the scaled process variable
(PV-L, PV-H).
4...20 mA corresponds to 0...10 l/min
4...20 mA corresponds to 0...8 l/min
Possible scale-value inputs in the example of
scaling
PV-L
PV-H
SP-L
SP-H
Process
setpoint
E-34-
POSITIONER 1067
Variante 1 Variante 2
0 0
1,0 10,0
0 0
0,8 8,0
Variante 3
0
100,0
0
80,0