CTI 2500-C100, Инструкция по установке и эксплуатации

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CTI 2500 Installation and Operation Guide V2.8 31
CHAPTER 3 USER PROGRAMMING
3.1 Overview
The CTI 2500 controller provides several methods for programming a control application.
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Relay Ladder Programming
•
Special Function Programming
•
Analog Loops
•
Analog Alarms
An overview of these capabilities is provided below. Comprehensive information can be found
in the CTI 2500 Programming Reference Manual.
3.2 Relay Ladder Programming
Relay Ladder Logic (RLL) is a graphical language similar to a relay diagram. It has traditionally
been used for discrete control applications. The RLL language includes the following groups of
instructions.
Electro-Mechanical Replacements
These instructions include contacts, coils, timers, counters, and drums (stepper switches).
Bit Manipulation
These instructions provide the capability of reading, setting, and clearing bits as well as
performing logical AND / OR operations.
BCD Conversions
The BCD instructions allow you to convert numbers between binary and binary coded decimal
formats.
Word Move Instructions
Using word move instructions, you can copy bits of a word values from a source destination to a
destination, which may be another memory type or another address within the same memory
type. You can also copy selected bits between a word data type and a discrete Boolean data
type.
Math
The math instructions allow you to perform traditional mathematical calculations, including
addition, subtraction, multiplication, division and square root. You can also perform compare
operations.
Table Instructions
The table instructions provide a means to manipulate array data. You can move data in and out
of a table, perform table searches, and perform bit level comparisons between two tables.
Clock Instructions
The clock instructions allow you to compare the time and date as well as set the time and date
in ladder.