Siemens 6DR50 Series Operating Instructions Manual page 118

Commissioning
7.2 Commissioning overview
3. Position feedback: You can adjust the range of position detection using the friction clutch
if necessary.
4. Adjust the positioner as per the respective actuator with the help of the initialization
process and by setting the parameters. If required, use the "PRST" parameter to cancel
the adjustment of the positioner on the actuator. The positioner is again in the "P manual
mode" after this process.
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 106)
Positioners subjected to fast acceleration or strong vibration (Page 45)
116
SIPART PS2 with and without HART
Operating Instructions, 09/2014, A5E00074631-12