VEGA VEGAPULS 66 (≥ 2.0.0 - ≥ 4.0.0) Foundation Fieldbus User Manual

Page 67

11 Supplement

VEGAPULS 66 • Foundation Fieldbus

36522-EN-121011

ent time constants with the primary and secondary process measurement.

Fig. 52: Schematic presentation function block PID Control

Function block Output Splitter

The function block "Output Splitter" generates two control outputs out of one input. Each output is

a linear image of a part of the input. A retrograde calculation function is realised by using the linear

imaging function inversely. A cascading of several Output Splitters is supported by an integrated

decision table for the combinability of inputs and outputs.

Fig. 53: Schematic presentation function block Output Splitter

Function block Signal Characterizer

The function block "Signal Characterizer" has two channels the outputs of which are not in linear

relation with the respective input. The non-linear relation is defined by a look-up table with individu-

ally selectable x/y-pairs. The respective input signal is imaged on the corresponding output, hence

this function block can be used in a control loop or signal path. Optionally the function axis can be

exchanged in channel 2 so that the block can be also used in a reverse control loop.