Siemens SIPART Series Operating Instructions Manual page 48

Installing/mounting
4.5 Positioners subjected to fast acceleration or strong vibration
4.5.2 Procedure locking the setting
Overview diagram
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 registration. The hysteresis in position registration can result in
unstable control behavior of the higher level control loop.
• Make sure the transmission ratio selector
①
Gear latch
②
Locking transmission ratio to 33°
③
Neutral position
④
Locking transmission ratio to 90°
⑤
Transmission ratio selector
Figure 4-9 Locking friction clutch and transmission ratio
46
value, either to 33° or to 90°.
⑤
and the gear latch
⑥
Friction clutch
⑦
Friction clutch latch
⑧
Locking friction clutch
⑨
Release friction clutch
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11
①
are set to the same