GEM 1436 cPos User Manual

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16 Operation
16.2.3.7.1 Explanation of parameters for 3 SetFunction
16.2.3.7.1.1 Setting the process controller parameters
(optional)
The following menus are only available for the design with in-
tegrated process controller (PA01).
ProcCtrlMode:
Switches the process controller on or off.
ProcCtrl: Submenu for setting process controller parameters.
Only available when ProcCtrlMode: is ON.
- Proc-P: Indicates the KP amplification of the process con-
troller.
- Proc-I: Indicates the Ti reset time for the process controller.
- Proc-D: Indicates the Kd process controller differential
component.
- Proc-T: Indicates the Tv delay time for the process control-
ler. Only available if Proc-D > 0.
- IxType: Defines the type of actual value input filter.
- OFF: Actual value input filter deactivated.
IxType [OFF]
Signal input unfiltered
IxType [OFF]
Signal input unfiltered
RC: The actual value input signal is filtered via a low pass fil-
ter.
IxType [RC]
Signal input unfiltered
IxTime
Signal input filtered
Avr: The actual value input signal is calculated by averaging.
IxTime: Defines the filter time for the actual value input.
IxType [avr]
Signal input unfiltered
Signal input filtered
IxTime
IxType [avr]
Signal input unfiltered
Signal input filtered
IxTime
16.2.3.7.1.2 Setting the positioner parameters
PosCtrl:
Submenu for setting positioner parameters.
- Pos P: Corresponds to the positioner’s KP amplification.
The optimum value is determined by the controller during
initialization.
- Pos D: Corresponds to the positioner’s D amplification.
- Pos T: Corresponds to the decay time for the positioner’s D
component.
- MinPos: Defines the lower position of the control range
(serves as a closing limit).
- MaxPos: Defines the upper position of the control range
(serves as a stroke limit).
0
80
60
40
20
100
100
80
60
40
20
Physical stroke x [%]
Set value w
[%]
Limited stroke
Unlimited stroke
OpenTight and CloseTight: Determines the close tight func-
tion areas (complete pressurization or ventilation of the actu-
ator).
With this function the valve can be moved into the seat using
the maximum possible actuator force. The close tight func-
tion can be activated for one end or both end positions.
Example:
If the setting CloseTight 0.5 % and OpenTight 99.5 % is made,
the valve closes or opens fully according to the following dia-
gram.
The hysteresis is 1 %.
Stroke
x [%]
Set value w [%]
If the control characteristic curve is changed to the values
1:25 or 1:50, the value for CloseTight should be set at >2.0 (if
the characteristic curve is 1:50) or >4.0 (if the characteristic
curve is 1:25) in order to close the valve fully.
16.2.3.7.1.3 Setting the dead zone
DeadBand:

GEM 1436 cPos Specifications

General

Brand	GEM
Model	1436 cPos
Category	Controller
Language	English