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6 commissioning – Siemens SIPART PS2 6DR52xx User Manual

Page 72

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Preparing for Operation

72

SIPART PS2 Manual

A5E00074631--06

3.6 Commissioning

Once the positioner has been fitted to a pneumatic actuator, it must be

provided with electrical and pneumatic auxiliary power.
Then you can then adapt the position controller to the respective actua-

tor by parameterizing and initializing it.
Mode” operating mode (which can also if necessary be attained by

“PRST”) -- “NOINI” will flash.
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:

S

Automatic initialization

Initialization takes place automatically. Hereby the positioner deter-

mines the direction of action, the stem travel and the angle of rota-

tion, the travel times of the actuator one after the other and adapts

the control parameters to the dynamic behavior of the actuator.

S

Manual initialization

The stem travel or angle of rotation of the actuator can be set

manually, the other parameters are determined as in automatic init-

ialization. This function is useful in actuators with soft limit stops.

S

Copying initialization data (positioner exchange)

In the devices with HART function the initialization data of a posi-

tioner can be read out and copied to another positioner. This en-

ables 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

adjustment capabilities and their effects are described in chapter 4,

page 89 “Operation“.

.

NOTE
N.B.: The operating pressure should be at least one bar greater than is

necessary for closing/opening the valve during initialization. However,

the operating pressure may not be higher than the maximum permis-

sible operating pressure of the actuator.
N.B.: The transmission ratio selector can only be set when the

positioner is open. Therefore check this setting before closing the

housing.

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