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3.3.4
Commissioning
Using the "Quick Start" menu, the electropneumatic positioner can be quickly adapted to the
valve and adjusted by means of an automatic startup function. The microcontroller optimizes
the control by determining the following during the initialization process (among others):
● Zero point
● Full-scale value
● Direction of action
● Positioning speed of shifting
● Dynamic positioning
3.3.5
Monitoring functions
The electropneumatic positioner has different monitoring functions. The monitoring functions
detect the changes to the actuator and valve, and compare these with the defined limits. If a
limit is exceeded, the display shows the corresponding diagnostic message. The message
can provide valuable information regarding the status of the actuator or valve. The
measuring data to be determined and monitored, some of whose limits can be adjusted,
include:
● Travel integral
● Number of direction changes
● Alarm counter
● Deadband
● Valve end limit position (e.g. for detection of valve seat wear or deposits)
● Operating hours (also according to temperature and travel ranges) as well as min./max.
● Valve positioning time
SITRANS VP300 with or without HART
Operating Instructions, 03/2011, A5E01258666-03
temperature
Description
3.3 Mode of operation
21
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