When the positioner is mounted and fully operational, set the friction clutch as described in the
section Setting the friction clutch (Page 116).
NOTICE
Wrong registration of the rotary or part-turn movement
A different setting of the transmission ratio selector and the gear latch results in a hysteresis
in position detection. The hysteresis in position detection can result in unstable control
response of the higher level control loop.
● Make sure the transmission ratio selector
⑤
and the gear latch
①
are set to the same
value, either to 33° or to 90°.
Note
Use of external NCS sensor / internal NCS module
If you use the accessory part "NCS sensor for non-contacting position detection" or a built-in
internal NCS module, the locking and fixing measures described in this section are not
necessary.
Requirement
● The positioner is mounted.
● You know whether the transmission ratio is to be set to 33° or 90°.
Installing/mounting
4.4 Setting and locking the transmission ratio
SIPART PS2 with PROFIBUS PA
Operating Instructions, 05/2019, A5E00127926-AC
51