CTI 2500-C100, Инструкция по установке и эксплуатации

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CTI 2500 Installation and Operation Guide V2.8 11
CHAPTER 1 OVERVIEW
1.1 Introduction
Providing the capabilities of a programmable logic controller and a loop controller, the CTI 2500
Series
®
controllers offer solutions for a wide range of process control applications. The CTI
2500 Series includes two families, CTI 2500 Series Classic and CTI 2500 Series Compact.
•
Classic: 2500 Series Classic controllers (2500-Cxxx) are physically compatible with the
Siemens SIMATIC 505 product line and may be installed in a CTI 2500 Series base or a
Siemens SIMATIC 505 base, along with CTI 2500 Series Classic I/O and SIMATIC 505
I/O.
CTI 2500 Series Classic controllers are also operationally compatible. They can run
most user programs that were originally developed for Siemens SIMATIC 505 controllers
(see APPENDIX D. – COMPATIBILITY for exceptions) and can communicate with
remote bases using SIMATIC 505 or CTI 2500 Series remote base controllers.
•
Compact: CTI 2500 Series Compact controllers (2500C-Cxxx) are physically smaller
than the Classic controllers but are otherwise operationally identical to the 2500 Series
Classic controllers.
1.2 Controller Features
1.3 User Program Support
User Program components include Relay Ladder Logic (RLL), Special Function programs,
Analog Loops, and Analog Alarms. The User Program is stored in battery backed RAM and is
preserved when power is removed from the controller, assuming the battery is good. See
CHAPTER 3 for more information about user programming.
Relay Ladder Logic
CTI 2500 Series controllers incorporate a powerful RLL programming language that is
compatible with the RLL used in the Siemens SIMATIC
®
505 PLC. The RLL program is
compiled in the controller before execution.
Special Function Programs and Subroutines
Special Function programs and subroutines introduce the capability to program in a procedural
language, similar to Basic or Structured Text. This capability can be used to implement control
processes that would be difficult or impossible to program in RLL.
All Special Function programs and subroutines are compiled on the controller. Where
applicable, they make use of the double-precision floating point unit provided by the CTI 2500
hardware.
Special Function programs and subroutines may be called from RLL for in-line execution or
queued for subsequent execution in the analog portion of the scan. Special Function programs
can also be called from PID loops or Analog alarms or executed on a cyclic basis.