Commissioning - Siemens PROFIBUS PA SIPART PS2 Manual

Preparing for Operation
3.6

Commissioning

.
66
Once the positioner has been fitted to a pneumatic actuator, it must be
provided with electrical and pneumatic auxiliary power.
The electrical auxiliary power can be provided via a bus interface or
separate power source with 15 to 30 V DC. Then you can then adapt
the position controller to the respective actuator by parameterizing and
initializing it and setting the bus address. Communication with a master
is not necessary for this.
If the positioner has not been initialized it will be in the "P Manual
Mode" operating mode (which can also if necessary be attained by
"PRST") -- "NOINI" will flash.
This initialization can be effected in three different ways:
Automatic initialization
S
Initialization takes place automatically Hereby the positioner deter-
mines the direction of action, the stem path and the angle of rota-
tion, 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
S
The stem travel or angle of rotation of the actuator can be set ma-
nually, the other parameters are determined as in automatic initiali-
zation. This function is useful in actuators with soft limit stops.
Copying initialization data (positioner exchange)
S
The initialization data of a positioner can be read out and copied to
another positioner. This enables a defective device to be changed
without having to interrupt an ongoing 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.
The possible operating modes and parameters, together with the ad-
justment capabilities and their effects are described in chapter 4 page
83 "Operation".
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 transmission ratio selector can only be set when the
positioner is open. Therefore check this setting before closing the
housing.
SIPART PS2 PA Manual
A5E00127926-03