Microprocessor-Based/Ddc Fundamentals - Honeywell AUTOMATIC CONTROL Engineering Manual

Introduction
Definitions
Background
Advantages
Controller Configuration
Types of Controllers
Controller Software

MICROPROCESSOR-BASED/DDC FUNDAMENTALS

Microprocessor-Based/
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Computer Based Control ..................................................................... 134
Direct Digital Control ........................................................................... 134
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Lower Cost per Function ..................................................................... 134
Application Flexibility ........................................................................... 135
Coordinated Multifunction Capability ................................................... 135
Precise and Accurate Control .............................................................. 135
Reliability ............................................................................................. 135
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Zone-Level Controller .......................................................................... 136
System-Level Controller ...................................................................... 136
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Operating Software ............................................................................. 137
Application Software ............................................................................ 137
Direct Digital Control Software ........................................................ 137
Energy Management Software ....................................................... 138
Optimum Start ............................................................................. 138
Optimum Stop ............................................................................. 138
Night Cycle ................................................................................. 138
Night Purge ................................................................................. 139
Enthalpy ...................................................................................... 139
Load Reset ................................................................................. 139
Zero Energy Band....................................................................... 141
Distributed Power Demand ......................................................... 142
Building Management Software ...................................................... 142
131
DDC Fundamentals
ENGINEERING MANUAL OF AUTOMATIC CONTROL
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