CTI 2500P-ACP1 Application Coprocessor module

The 2500P-ACP1 Application Coprocessor module is a general-purpose auxiliary controller that enhances the

capabilities of all Siemens Series 505® and CTI 2500 Series® PLC systems. This Advanced Function

Module (AFM) includes high-speed processing and multi-protocol communications support to

provide existing systems with a significant increase in performance and functionality.

The 2500P-ACP1 generally runs as a PLC coprocessor performing complex logic/math functions,

data logging, and communications with external devices. Although the 2500P-ACP1 can operate

as a stand-alone controller, the application generally requires data transfer between a host PLC

and the module.

The ACP1 module includes two options for real-time data transfer:

 Direct PLC I/O bus: Allows the ACP1 coprocessor to emulate a standard I/O module so

that discrete and/or word image register data is transferred each PLC scan.

 Data Cache: Proprietary link offering enhanced data throughput to CTI 2500 Series®

controllers via an external Ethernet connection. Provides access to all PLC memory

types and up to 1024 PLC memory locations.

CTI Workbench is used for configuration of module parameters and development of the user

application program for the 2500P-ACP1. CTI Workbench is a full-featured utility with integrated

configuration tool, programming editor, debugger, data monitor, and simulator. The application

program may be developed in any of five IEC-61131 programming languages. A complete library

of functions is provided to perform the following tasks:

 Complex mathematical computations

 Boolean logic

 Data conversion

 String handling

 Timer/Counter operations

 PID control

 Alarm monitoring

 Complete data logging system (including time-stamped data storage and automatic FTP

file transfer to remote FTP Server)

The 2500P-ACP1 supports Ethernet communications through two 10/100Mb Ethernet ports and

RS-232/RS-422 connections through the serial port.

Embedded client and server protocols can be used for data transfer with other controllers and

devices. All message processing for client operation (request triggering, packet send/receive,

message validation, data insertion/extraction, and error handling/retries) is done in the module

with no PLC logic required.  The 2500P-ACP1 module supports the following communications protocols:

 CAMP Client

 Open Modbus Client

 Open Modbus Server

 Network Data Exchange (Binding) Publish/Subscribe

 Modbus RTU Master (serial)

 Modbus RTU Slave (serial)

 General ASCII Send/Receive (serial)

The module provides extensive diagnostic facilities, accessible via a standard web browser, to

monitor module status and aid in the detection and correction of errors.  The web server provides

access to product information, Ethernet operational statistics, and diagnostic history.