Connection of distributed I/Os

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AS 488 in SIMATIC design

■Overview

All versions of the AS 488/TM automation system can be operat- ed with distributed process I/Os on the PROFIBUS-DP. The PROFIBUS-DP fieldbus is standardized according to EN 50 170, Part 3. It permits communication between the automation sys- tems and distributed I/O devices from the ET 200 range, simple DP-oriented operation and monitoring devices, as well as PROFIBUS field devices conforming to the standard.

In addition to the ET 200 M I/O devices specially tailored for pro- cess engineering with a wide selection of signal and function modules from the SIMATIC S7-300 range, it is also possible to use SIMATIC ET 200B, ET 200S, ET 200iS (available soon),

ET 200X or ET 200U (no longer actively marketed) systems as process I/Os on PROFIBUS-DP. When using the DP interfaces integrated in the CPU modules of the SIMATIC S7-300, it is also possible to implement a simple slave connection to the AS 488/TM. Gateway modules on the PROFIBUS-DP (DP/PA link, DP/AS-i link, DP/DP coupler) additionally permit access to the PROFIBUS-PA and AS-I fieldbuses and to the I/O buses of SIMATIC PCS 7, S7-300, S7-400 or systems from other vendors.

Up to 122 stations can be connected via each of the two physi- cally isolated lines of the PROFIBUS-DP to an AS 488/TM auto- mation system. The AS 488/TM functions in this case as the mas- ter. Data transmission is possible via a two-wire cable or fiber- optic cable.

Each of the two PROFIBUS-DP lines is connected to the

AS 488/TM via an IF 964-DP interface module inserted in the EXM 478 extension module.

The second PROFIBUS-DP line is optional. To activate the AS in- terface for the second PROFIBUS-DP line, DP2-INI initialization must be loaded onto the memory card with the system software using the commissioning terminal. The DP2-INI initialization must be ordered separately on a 3.5-inch diskette.

■Ordering Data

	Order No.
EXM 478 expansion module	6ES7 478-2AC00-0AC0

to accommodate 3 interface mod- ules

Required 1 x for each of the max. 2 DP lines with electrical version of PROFIBUS-DP:

IF 964-DP interface module	6ES7 964-2AA01-0AB0
Required 1 x for each of the max.
2 DP lines with fiber-optic cable
version of PROFIBUS-DP:
IF 964-DP interface module	6ES7 964-2AA01-0AB0
OLM/G12 optical link module	6GK1 502-3CB10
Connecting cable 830-1 for	6XV1 830-1CH30
PROFIBUS, 3 m
Additionally required for 2nd
DP line (can be repeatedly used):
DP2-INI initialization	C79451-A3496-D900

3.5-inch diskette with initialization files and documentation in Ger- man and English

5/6	Siemens PLT 112 · 2002

AS 488/TM specifications

The Siemens AS 488/TM is a cutting-edge solution in the realm of industrial automation and control. Designed specifically for high-performance applications, this device serves as a programmable logic controller (PLC) offering enhanced capabilities for process automation. The AS 488/TM stands out in the marketplace for its robust architecture, sophisticated features, and compatibility with various industrial protocols.

One of the pivotal features of the Siemens AS 488/TM is its integrated communication capabilities. It supports multiple communication protocols, such as Profibus, Profinet, and Ethernet/IP, facilitating seamless integration within diverse industrial environments. This flexibility ensures that the AS 488/TM can communicate with various devices, sensors, and actuators, providing a comprehensive solution for modern manufacturing needs.

In terms of processing power, the AS 488/TM is equipped with a high-performance CPU that can handle complex algorithms and data processing with ease. This enables the controller to manage intricate automation tasks, from simple control functions to complex multi-axis motion control. The device also comes with expandable I/O options, allowing users to tailor the system to meet specific application requirements. With a wide range of digital and analog inputs and outputs, the AS 488/TM ensures accurate monitoring and control of various processes.

Another notable characteristic of the AS 488/TM is its user-friendly programming interface. Siemens has developed the TIA Portal (Totally Integrated Automation Portal), a software platform that simplifies the programming and configuration of the PLC. This intuitive interface allows users to program the device using various programming languages, including Ladder Logic, Function Block Diagram, and Structured Text. The TIA Portal enhances productivity by providing simulation tools for testing and debugging applications before deployment.

The AS 488/TM also emphasizes safety and reliability. It complies with international safety standards and incorporates features that ensure safe operation in critical applications. Redundant power supplies and fail-safe mechanisms are integrated to minimize downtime and protect both personnel and equipment.

Moreover, the Siemens AS 488/TM is designed with future scalability in mind. As industries evolve and technology advances, the AS 488/TM can adapt to new requirements, ensuring a long service life and ongoing relevance in a rapidly changing landscape. Overall, the Siemens AS 488/TM is an impressive PLC that combines innovative features, robust technology, and flexible integration capabilities, making it an ideal choice for modern industrial automation systems.

AS 488 in SIMATIC design