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Special Function Programs

The controller compiles all SF programs and subroutines. 

They are compiled in the following situations:

• When a user program is downloaded to the PLC, if the SF Program or subroutine is enabled,

• When the SF program or subroutine is enabled, if the SF program has been modified,

• During a Power Up start (following the application of power).

Programs that contain errors will not be enabled. During a program download, Workshop will

display a message indicating the error. Once you acknowledge the message,

the download will continue, leaving the program disabled. You must correct the programming

error before the program or subroutine can be enabled. User Programs originally written

for the Simatic® 505 PLC may contain undetected errors, if the programs were not originally compiled.

This can occur because the SF interpreter never attempts to execute the instruction

due to the branching logic. A common problem is that additional ENDIF statements are included

or the correct number of ENDIF statements is not present.

Unlike the Simatic® 555. there are no restrictions regarding the instructions that

can be used in a compiled program.

COMPATIBILITY OVERVIEW

The CTI 2500 Series® Processor is designed to be compatible with customer applications 

that use the Simatic® 545 and 555 controllers. While the CTI 2500 matches or exceeds

the capabilities of these processors in most aspects, there are a few areas in which the

CTI 2500 operates differently.

Relay Ladder Logic

The RLL used in the controller provides equivalent instructions for all Simatic® 555

instructions except the XSUB instruction. External subroutines are not supported.

If you download a program containing the XSUB instruction, it will be ignored.

In many cases XSUB is used for communications with Siemens® Profibus HMI panels.

For these installations we have a CTI program free on our website which replaces the XSUB.

For XSUB uses other than Siemens® HMI panels, CTI and our partners can develop XSUB

replacement software using SF programming. Please contact us.

SPECIFICATIONS

Ports:

Ethernet, 100Mbit, RJ45

RS232C: DB9 male

Profibus: 12Mbit, DB9 female

Remote I/O: DB9 male

SD Flash card: up to 32G bytes (with Firmware

V6.18 and higher)

Expansion port: future use

User Memory:

2500-C100: 128K

2500-C200: 256K

2500-C300: 512K

2500-C400: 3072K

Loops / Alarms:

2500-C100: 16 / 32

2500-C200: 64/ 128

2500-C300: 512 / 512

2500-C400: 512 / 512

Status Display:  3-Digit LED display for system

status, error reporting and IP address

Backplane Power:  7 Watts (maximum)

Operating Temperature:  0o to 60oC

Storage Temperature:  -40o to 85oC

Relative Humidity:  5% to 95%

Agency Approvals:  CE, UL UL-C,

Class 1 Div 2

Shipping Weight:  1.5 lb. (0.68 Kg)

IMPORTANT NOTE: This product includes a lithium battery for backing up the user program,

retentive variables, and system diagnostics.  For safety in transportation,

the battery is installed but disabled.  Prior to putting this product into service, you MUST

move dipswitch SW1 to the CLOSED position to enable the battery.

DESCRIPTION

The 2500 Series® Controllers bring exciting new features and a new level of process

performance to Simatic® 505® Control Systems.

The C100 and C200 models easily handle medium to large discrete control applications,

as well as basic process applications. The C300 and C400 models are equipped to handle large

process applications with many PID loops and alarms and special mathematical functions.

The 2500 Series® Controllers are designed to seamlessly replace all Simatic® 545 and 555

controllers while providing much higher performance at lower cost. The controllers are

supported by a complete range of digital, analog, and specialized I/O modules, power

supplies, and I/O bases, all available from CTI.

FEATURES

• Replaces all Simatic® 545 and 555 models

• Built-in Ethernet and USB ports for programming

• Built-in SD Flash card for firmware update from flash

• Built-in Profibus and RS485 Remote I/O on C200. C300. and C400 models

• Up to 3Mbytes memory, 8192 I/O points, 512 PID loops & 512 alarms, depending on model

• Programmable using Workshop

• Integrity® Real Time Operating System for high-reliability and security

Features

• Connects to CTI and legacy Siemens® /TI CPUs over Ethernet

• Several models with differing I/O capabilities allow you to customize the solution to your needs

• Serial RS232/485 and 900MHz radio options for additional communications flexibility

(900MHz wireless subject to import limitation, depending on country)

• Extensive intelligent features for processing attached I/O signals:

 Totalization, filtering, forcing, inversion, runtime, and counting on digital inputs

 Frequency out (with PWM) and synchronization on digital outputs

 Filtering, averaging, scaling and totalization on analog inputs

 Data logging and trending

• All module configuration done using a simple web browser interface

• Wide –40°C to +70°C operating temperature range

The 2500S family of Slice I/O modules expands the capability of 2500 Series® Systems

to include small drops of I/O connected over Ethernet.

Slice I/O modules communicate to 2500 Series® Processors using CAMP protocol

and read/write directly to the PLC memory or I/O image table. This allows transparent

integration into the 2500 Series® system without the requirement for any complicated

configuration step.  Ethernet connection to the CPU can be accomplished using the

on-board port on 2500-Cxxx Processors, using a 2572 / 2572-A Ethernet module,

or using the 2500P-ECC1 Ethernet Communications Coprocessor. 

Note that when using 2572 or 2572-A modules, Slice I/O can be connected even to

legacy Siemens® and Texas Instruments PLCs.

Several models of Slice I/O are available with different mixes of I/O and with additional

communications options including RS232/485 and 900MHz radio.

Slice I/O modules feature Universal Analog Inputs which allow connection of 0-5V, 

0-20mA, thermocouple, and RTD sensors.

All Slice I/O modules can also be configured to communicate over Ethernet using Modbus-TCP.

The 2500 Series® Slice I/O System is designed for use in a broad range of applications,

including those that require discrete and analog control. It is compatible the the 2500

Series® System, and offers modularity down to a single module, without the need for an

I/O base and RBC.  Slice I/O 23-xxxx modules operate from 24VDC power,

while 26/27-xxxx models operate on 12VDC power (design for solar cell applications).

All Slice I/O modules communicate with a remote 2500 Series® CPU using Ethernet to

read/write directly to the PLC memory or I/O image table.

This allows transparent integration into the 2500 Series® system without the requirement

for any complicated configuration step.  Ethernet connection to the CPU can be accomplished

using the on-board port on 2500-Cxxx Processors, or using a 2572 / 2572-A Ethernet module.

Note that when using 2572 or 2572-A modules, Slice I/O can be connected even to legacy

Siemens® and Texas Instruments PLCs.

Several models of Slice I/O are available with different mixes of I/O and with additional

communications options including RS232/485 and 900MHz radio.