Copying Initialization Data (Replacing The Positioner) - Siemens SIPART PS2 Betriebsanleitung

Operating instruction
7.3

Copying initialization data (replacing the positioner)

With this function, you have the possibility to commission positioners without having to carry out the initialization
procedure. This enables, for example, a positioner to be replaced on running equipment when an automatic or
manual initialization cannot be carried out without interrupting the process.
.
NOTE
The initialization (automatic or manual) should be performed as soon as possible afterwards
because only then is the positioner optimally adjusted to the mechanical and dynamic characteris-
tics of the actuator.
The transfer of data from the positioner to be replaced to the replacement device takes place via the fieldbus.
The following procedure describes how to replace a positioner when using the National Configurator. If you use
a different tool step 5 may vary slightly.
1. Prerequisite is that the positioner to be replaced and all ist parameters is in the project database. The replace-
ment instrument should be online on the bus.
2. Fix the actuator in its momentary position (by mechanical or pneumatic means).
3. Read and note the current position value of the positioner to be replaced. If the electronics are defective,
determine the current position by measuring on the actuator or valve.
4. Disassemble the positioner. Mount the lever arm of the positioner on the replacement instrument. Mount the
replacement instrument on the valve. Move the gear switch to the same position as the defective instrument.
5. Now transfer all parameters from the projected positioner to the new positioner. With the NI Configurator this
can be done by right clicking the appropriate blocks in the function block application window, chosing "Re-
place With ..." and selecting the new blocks. Do this also with the Transducer Block. In order to transfer the
parameter INIT_VALUES (Initialisation parameters), you have to set SERVICE_UPDATE (Save/Reset) to
9 (Enable Write INIT--Values), then click "Write changes" and set SERVICE_UPDATE to 3 (Set device to
state INIT). Now the positioner is initilized with the same parameters as the old one.
6. If the current position value on the display does not match the noted value of the defective positioner, set
the correct value with the slip clutch.
7. The positioner is now ready to operate. The accuracy and dynamic behavior may be restricted in relation
to correct initialization. The position of the hard stops and the related maintenance data may show deviations
in particular. Therefore initialization must be performed at the earliest opportunity.
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SIPART PS2 EEx d FF
A5E00351419--01