Sequence Of Automatic Initialization - Siemens SIPART PS2 Operating Instructions Manual

Commissioning

7.3 Sequence of automatic initialization

Types of initialization
You can initialize the positioner as follows:
● Automatic initialization:
during automatic initialization, the positioner determines the following one after the other:
– The direction of action
– The actuator travel and angle of rotation
– The travel time of the actuator
The positioner also adjusts the control parameters as per the dynamic response of the actuator.
● Manual initialization:
the actuator travel and the angle of rotation of the actuator are set manually. The remaining
parameters are automatically determined. This function is useful for valves which are lined,
for example, with PTFE.
● Copying the initialization data when replacing a positioner:
the initialization data of a positioner can be read and copied into another positioner. A
defective device can thus be replaced without interrupting an ongoing process through
initialization.
You have to define a few parameters for the positioner before initialization. Owing to the preset
values, you cannot adjust further parameters for initialization.
You can use a suitably configured and activated binary input to protect the configured settings
against accidental adjustment.
See also
Overview of operating modes (Page 98)
Positioners subjected to fast acceleration or strong vibration (Page 48)
7.3 Sequence of automatic initialization
Overview
The automatic initialization takes place in the following phases:
Automatic initialization phase
Start
RUN 1
RUN 2
RUN 3
RUN 4
RUN 5
End
108
Description
-
Establishing the direction of action.
Checking the actuator travel and trimming the lower and
upper endstops.
Establishing and displaying the travel time (leakage test)
Minimization of controller increments
Optimization of the transient response
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Operating Instructions, 05/2017, A5E00074631-AC
SIPART PS2 with and without HART