Gemu 1436 cPos - 13.4 4 SetCalibration; Determining the direction of actual value and set value; Defining the characteristics of the control curve

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1436 cPos
13.4 4 SetCalibration
Service
1
SetBasics
2
SetFunction
3
SetCalibration
4
Return
6
SETUP
Communication
5
13.4.1 Determining the direction of actual value and set value
W-Direction:
Denes the direction of the set value signal (rising / falling).
X-Direction:
Denes the direction of the actual value signal (rising / falling). Only available when positioner is working as a process controller.
0
20
40
60
80
100
Sollwert w [%]
20
40
60
80
100
Hub x
Venl
GESCH
LOSSEN
V
entil
OFEN
W-
[fall]
W-Direcon [rise]
Direcon [fall]
Stroke
Setvaluew[%]
Valve
OPEN
Valve
CLOSED
0
20
40
60
80
100
Sollwert w [%]
4
8
12
16
20
Eingangssignal
in mA
W-Direcon [fall]
W-Direcon [rise]
X-
[fall]
X-Direcon [rise]
Direcon [fall]
in mA
Istwert x [%]
Setvaluew[%]
Input signal
in mA
Actual value x [%]
Working as a positioner Working as a process controller
13.4.2 Deningthecharacteristicsofthecontrolcurve
W-Function:
The characteristics of the control curve can be dened (linear/ 1:25 / 1:50 / free).
Lineare u. gleichprozentige Kennlinien
2,0
3,0
4,4
6,5
9,6
14,1
20,9
30,9
45,7
67,6
100,0
4,0
5,5
7,6
10,5
14,5
20,0
27,6
38,1
52,5
72,5
100,0
0
10
20
30
40
50
60
70
80
90
100
0,0
20,0
40,0
60,0
80,0
100,0
120,0
0 20 40 60 80 100 120
Sollwert w [%]
Hub x [%]
1:50
1:25
linear
Strokex[%] Linear and Equal-Percentage characteristic control curves
Linear
Setvaluew[%]
In order to be able to close the valve fully at an equal % selection of 1:25 or 1:50, the close tight function (see chapter 13.3.2) must
be set to the value >2.0 (for characteristic 1:50) or >4.0 (for characteristic 1:25).
SetW-free:
Eleven calibration points on the control curve can be programmed as required.
Y-Direction:
Denes the direction of the process controller output (rising / falling). An inverted process control system can be realized.