West Control Solutions KS98-1 - Manual (Page 89)

III Function blocks:
The KS98-1 function library contains all functions which are normally used for plant operation. These include:
w Functions for calculation of mathematic formulas from simple addition to exponent function
w Logic functions and functions for realization of control sequences
w Numerous selection and storage functions are helpful for signal processing.
w Alarm and limit value functions are indispensable for plant safety.
w Interface functions facilitate communication with adjacent and supervisory systems.
w Functions for implementation of complex and flexible control and program sequences as well as profile control
tasks meet the most exacting requirements.
The wiring principle of composed functions such as programmer, controller cascades and stepping control are explained in
the relevant basic function descriptions in this manual.
Examples for the basic engineering as mentioned in this manual, and further application examples for various require -
ments are included on a CD as a collection of examples with detailed description, or available on request.
General KS 98-1 function block features
The features of multi-function unit KS 98-1 are determined by purposeful connection of standard function blocks with
adjustable parameters.
In the KS98-1 engineering, a function block represents a black box with analog inputs (from left), analog outputs (to
right), digital control inputs (from top) and control or status outputs (to bottom), as shown in the integrator diagram.
The following abbreviations are used for general inputs which mean process values and outputs which mean function
results:
w analog inputs: X1, X2, ...
w analog outputs: Y1, Y2, ...
w digital inputs: d1, d2, …
w digital outputs: z1, z2, ...
g
The abbreviations for inputs and outputs with special signification are
derived from their function.
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