User`s guide

Release E UMC800 Control Builder User’s Guide 85
1/01
Control Strategy Configuration
Overview
Introduction
The UMC800 uses function block diagram configuration architecture to develop control strategies for both
analog and digital control.
A function block can represent a physical input or output, a group of physical inputs or outputs, an internal
calculation, or an internal function such as a PID algorithm.
A single controller configuration can have up to 250 user defined function blocks. Except for the types
listed below, a function block algorithm type can be used any number of times up to the limit of 250
blocks:
• PID, On/Off, CARB, and TPSC loops and associated support blocks 8 or 16 maximum
• Setpoint Programming and associated support blocks 4 maximum
• Setpoint Scheduler and associated support blocks 1 maximum
• Selector Switch 4 maximum
• Time Proportioning output blocks 16 maximum
• Modbus Slave 16 maximum
REFERENCE
Reference material for all Function Blocks can be found in the UMC800 Control Builder
Function Block Reference Guide Document #51-52-25-64.
REFERENCE
Examples of Loop and Logic Control can be found in Appendix A – Logic Application
Examples and Appendix B – Loop Application Examples.
What’s in this section?
The following topics are covered in this section.
Topic See Page
Overview 85
Before You Start 87
Stages of Configuration 88
How to Select Function Blocks, Variables, and Constants 89
Connecting/Disconnecting Function Blocks (Softwiring) 91
How to Enter Signal Tags 93
How to Enter a Text String 94