Siemens AS 488/TM manual Area of application, Functions Highlights

This catalog is out of date, see note on page 3

Introduction

AS 488/TM

■Area of application

The main applications of the AS 488/TM are:

•Replacement of existing AS 220, AS 230/230 K and AS 235/235 K automation systems

With an AS 220 / AS 230 / AS 235, the subrack with the central processing units in the TELEPERM M cabinet is replaced by an AS 488 S with compatible functions. Existing extension units with installed TELEPERM M I/Os can be used further. With an AS 230 K / AS 235 K, migration is carried out by replacing the complete basic system in the TELEPERM M housing, rack or cabinet by an AS 488 K compact system with compatible func- tions. TELEPERM M I/O modules previously inserted in the AS 230 K / AS 235 K basic system can be used further follow- ing conversion and rewiring in the migration rack of the

AS 488 K.

When replacing existing automation systems, the AS 488 S and AS 488 K migration systems are preferably connected to the existing CS 275 system bus. Alternatively possible is con- nection to the PROFIBUS-TM system bus.

•Expansion of existing TELEPERM M systems on the CS 275 system bus

Expansions on the CS 275 system bus are mainly the result of modernization by migration with AS 488/TM. Existing systems with TELEPERM M I/Os can also be expanded by SIMATIC dis- tributed I/Os on the PROFIBUS-DP. In addition to the ET 200M with a comprehensive range of standard I/O modules for pro- cess engineering applications, it is also possible to use the complete range released for AS 488/TM.

•Expansion of existing TELEPERM M systems by PROFIBUS-TM system components with use of the CS-L2 bridge

Existing and new system components can be connected to- gether using a CS-L2 bridge. The bridge couples the two CS 275 and PROFIBUS-TM buses, and converts the different parts of the TM protocol. The AS 235 and AS 488/TM systems on the CS 275 bus can then also be controlled by OS 525 op- erator systems or PCS7/TM-OS on the PROFIBUS-TM. Analog and binary values can be exchanged between automation sys- tems on the two buses.

Distributed SIMATIC I/Os on the PROFIBUS-DP are primarily used for acquisition and output of process signals on the PROFIBUS-TM components used for the system expansion. In addition to the ET 200M with a comprehensive range of stan- dard I/O modules for process engineering applications, it is also possible to use the complete range released for

AS 488/TM.

•New systems with the AS 488/T M automation system In the case of new systems, it is recommendable to use the PROFIBUS-TM based on the standardized PROFIBUS as the system bus. The AS 488/TM automation systems are operated centrally using bus-coupledPCS7/TM-OS operator systems, and configured via bus using the PROGRAF AS+/NT program package. The SIMATIC distributed I/Os from the ET 200 range are preferred as the process I/Os. Interfacing to the automation systems is carried out via the PROFIBUS-DP fieldbus.

The favorite standard within the ET 200 range is the ET 200M I/O system with a comprehensive range of I/O modules of SIMATIC S7-300 design, including special modules for pro- cess engineering. In addition, the complete range of distribut- ed I/Os released for AS 488/TM can of course also be used.

■Functions Highlights

•Functions compatible with the proven AS 235 automation sys- tems: existing application software and installed process I/Os can be used further

•Future-oriented system basis:

continuous evolution to new technologies with the modern hardware platform of the SIMATIC M7 systems

•Two performance ranges:

selectable CPU performance corresponding to 150% or 270 to 300% of the performance of an AS 235

•Four design systems:

-AS 488 in modular standard packaging system according to SIMATIC guidelines

-AS 488 S cabinet system for installation in TELEPERM M cab- inets

-AS 488, installed in SIMATIC PCS 7 cabinets

-AS 488 K compact system for installation in TELEPERM M wall housing or cabinets

•Can be used for modernization and expansion of existing sys- tems and also for new systems

•Flexible adaptation of automation system to the respective task:

-Comprehensive range of distributed I/Os

-ET 200M I/Os especially suitable for process engineering

-Compact modules in adapter casings, operation without fans

-Adaptable packaging system

-Migration of existing TELEPERM M systems

•Modern communication standards:

-PROFIBUS-TM system bus for connection of components close to the process or remote from the process, also with op- tical design (redundant media)

-PROFIBUS-DP fieldbus for interfacing of distributed process I/Os and of systems from other vendors with a smaller data in- terface

•PROFIBUS-AG/AG coupling bus for interfacing of SIMATIC S5, SIMATIC S7, SIMATIC PCS 7 and systems from other vendors with data coupling (independent of system bus)

•Bridge for connection of CS 275 and PROFIBUS-TM system buses

1/6 Siemens PLT 112 · 2002