Cashco Siemens PS2 I/P - Manual (Page 57)

Preparing for Operation
57
SIPART PS2 Manual
A5E00074631-01
3.6 Commissioning
Due to the wide range of application possibilities the positioner must be
adapted (initialized) to the respective actuator individually after assem-
bly. This initialization can be effected in three different ways:
- Automatic initialization
Initialization takes place automatically Hereby the positioner deter-
mines the direction of action, the displacement path and the angle of
rotation, the adjusting times of the actuator one after the other and
adapts the control parameters to the dynamic behavior of the actua-
tor.
-
Manual initialization
The displacement path or angle of rotation of the actuator can be
set manually, the otehr parameters are determined as in automatic
initialization. This function is useful in actuators with soft limit stops.
- Copying initialization data (positioner exchange)
In the devices with HART function the initialization data of a positio-
ner can be read out and copied to another positioner. This enables a
defective device to be changed without having to interrupt an ongo-
ing process by initialization.
Only a few parameters need to be set in the positioner prior to initializa-
tion. The others are defaulted so that they do not normally need to be
adjusted. You will have no problems with commissioning if you observe
the following points.
.
NOTE
You go to the previous parameter by pressing the operation mode key
and the decrement key simultaneously.
Without initialization the positioner is in operating mode P manual
operation (this may also be reached by ”PRST”) -- ”NOINI” flashes.
.
NOTE
N.B.: The operating pressure should be at least one bar greater than is
necessary for closing/opening the valve during initialization.
N.B.: The gear transmission switch can only be set when the
positioner is open. Therefore check this setting before sealing the
housing.