Siemens AS 488/TM manual Connecting Simatic I/Os, Interface module for connection to PROFIBUS-DP

This catalog is out of date, see note on page 3

Process I/Os

Connecting SIMATIC I/Os

■Overview

In addition to the migration of existing TELEPERM M I/Os, all ver- sions of the AS 488/TM automation system can also be extended by distributed I/Os on the PROFIBUS-DP. In addition to the

ET 200M system with a comprehensive range of I/O modules es- pecially tailored for process engineering, the SIMATIC ET 200B, ET 200S, ET 200iS (available soon), ET 200X and ET 200U (no longer actively marketed) systems are also suitable.

A comprehensive range of compact modules in casings and for operation without fans is therefore available in the form of mod- ular, distributed units for automation.

The ET 200M I/O system designed for the complex demands of process engineering is suitable for both cabinet and wall mount- ing. The system has a comprehensive range of input/output modules:

•Standard signal modules with module-specific diagnostics

•Standard function modules with autonomous preprocessing, e.g. for dosing and counting

•Ex signal modules for connection of intrinsically-safe sensors and actuators in zone 1 or 2 of hazardous plants.

Two PROFIBUS-DP interfaces are available for connecting the SIMATIC distributed I/Os to the AS 488/TM automation systems. Up to 122 stations, and thus max. 976 I/O modules, can be con- nected per PROFIBUS-DP line.

Interface module for connection to PROFIBUS-DP

The IF 964-DP interface module, which can be plugged into the EXM 478 extension module, is required to connect the PROFI- BUS-DP fieldbus to the automation systems and the AS 488/TM.

Communication via the PROFIBUS-DP fieldbus

The PROFIBUS-DP fieldbus is standardized according to EN 50 170, Part 3. It permits communication between the

AS 488/TM automation systems and ET 200 distributed I/O sys- tems, CPUs/CPs with DP interface, DP-oriented operation and monitoring devices, and PROFIBUS field devices conforming to the standard.

Up to 122 stations can be connected to an automation system via each of the 2 physically isolated lines of the PROFIBUS-DP fieldbus. The AS 488/TM system functions as the master. Data transmission is possible on two-wire cables or fiber-optic cables.

The second PROFIBUS-DP line is already available as standard. It is connected via a further IF 964 interface module on the EXM 478 module. A DP2-INI initialization file is loaded by the commissioning terminal onto the memory card with the system software in order to activate the AS interface for the second PROFIBUS-DP line.

Bus stations on the DP bus

The AS 488/TM automation system is the DP master and thus the active station in each case. Passive stations (DP slaves) can be:

•ET 200M, ET 200S, ET 200iS (to the extent of a standard slave; available soon), ET 200X, ET 200B and ET 200U distributed I/O systems

•SIMATIC S7 CPU 31x-2 DP automation systems with DP slave interface

•SIMATIC S7-300 communications modules with DP slave inter- face

•DP/DP coupler for connecting the PROFIBUS-DP of a system from other vendor

•SIMATIC S5-115U, S5-135U and S5-155U programmable con- trollers (with IM 308-C as DP slave)

•SIMATIC S5-95U/DP slave automation system

•Windows-based HMI systems such as OP170S, MP290, MP370

•Field devices (also from other vendors), e.g. drives, valves and process controllers

•SIMATIC S7-315-2 DP (slave) automation system

Configuring

The tools available for configuring, parameterization, commis- sioning and diagnostics of the PROFIBUS-DP are easy to use. The master interfaces of the automation systems can be config- ured using the COM PROFIBUS parameterization software. PROGRAF AS+/NT is preferably used to configure the driver blocks in the CPU. The commissioning terminal can also be used for this during the commissioning phase.

Process image

The central processing unit of the automation systems commu- nicates with the I/O modules via a process image (current pro- cess data). Module assignments and addresses are defined by the configuration. To achieve this, the associated driver block is parameterized with the module number via the process image in the same manner as for the AS 235 system. SYST.WART is used to assign the module number to the station address.

Network configuration

The possible network configurations of the PROFIBUS-DP corre- spond to those of the PROFIBUS-TM system bus (see Section "Bus communication").

8/4 Siemens PLT 112 · 2002