Siemens SITRANS P DS III - PROFIBUS Operation Functions

SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
95
Operator control functions via PROFIBUS
7
7.1
Communications structure for PROFIBUS PA
7.1.1
Overview
This chapter describes the processing method of the device-specific function blocks using a
graphical block model which is resolved into its individual layers step by step. Knowledge of
the physical block is assumed: This block is therefore not explained in this chapter.
7.1.2
Block model for collection and processing of measured values
The device functions are subdivided into blocks of different task areas. They can be
parameterized during asynchronous data transmission.
p
Pressure
S
Sensor
T
Temperature
Figure 7-1 Block circuit diagram of collection and processing of measured values