3
C
ontents
1.
Operating instructiOns ........................................................................................................................................................7
1.1. symbols ......................................................................................................................................................................................7
1.2. Definition of term “device” ................................................................................................................................................7
2.
authOrizeD use .............................................................................................................................................................................8
2.1. restrictions ...............................................................................................................................................................................8
3.
Basic safety instructiOns .................................................................................................................................................9
4.
general infOrmatiOn .............................................................................................................................................................11
4.1. contact addresses .............................................................................................................................................................11
4.2. Warranty ...................................................................................................................................................................................11
4.3. information on the internet ............................................................................................................................................11
5.
DescriptiOn Of system ........................................................................................................................................................12
5.1. general description ...........................................................................................................................................................12
5.1.1. Features .....................................................................................................................................................12
5.1.2. Combination with valve types and mounting versions ....................................................................13
5.1.3. Optionally external position feedback with inductive proximity switch .......................................13
5.1.4. Overview of the mounting options.......................................................................................................14
6.
structure ........................................................................................................................................................................................15
6.1. representation .....................................................................................................................................................................15
7.
functiOn ............................................................................................................................................................................................16
7.1. function diagram ................................................................................................................................................................16
7.2. function of the position control ..................................................................................................................................17
7.3. schematic representation of the position control ............................................................................................18
7.4. properties of the position controller software ....................................................................................................19
7.4.1. Functions I .................................................................................................................................................19
7.4.2. Functions II ................................................................................................................................................19
7.5. interfaces of the positioner ..........................................................................................................................................21
Electropneumatic positioner Type 8791
english
Type 8791
