Siemens AS 488/TM manual Migration of existing systems, General marginal conditions

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Migration of existing systems

Introduction

Migration of existing systems

■Overview

Two different design versions of the AS 488/TM migration packages are available for migrating existing TELEPERM M AS 220 S, AS 230, AS 230 K, AS 235 and AS 235 K automation systems: AS 488 S and AS 488 K.

Migration of the AS 220 H and AS 235 H automation systems is only possible specific to projects, with relinquishing of redun- dancy

The AS 488 S migration package for migrating AS 220 S/H, AS 230/ AS 230 K or AS 235/ AS 235 K/ AS 235 H with

AS 488/TM in cabinet packaging system and the AS 488 K mi- gration package for migrating AS 230 K/ AS 235 K with

AS 488/TM in compact design guarantee, on the one hand, maintenance compatibility of existing plants with systems which have already been deleted or will soon no longer be available, and, on the other hand, offer numerous facilities for modernizing and expanding these plants with a simultaneous increase in AS performance.

The application software has compatible functions, and can be used further providing it is generated and used in line with the standards described in the manuals. This also applies to all downloadable special drivers of standard I/O modules which have been explicitly released for AS 488/TM.

AS 488 S or AS 488 K automation systems for new plants or for the expansion of existing plants can be defined using an Order No. with associated configurator, and are then supplied completely equipped and pretested.

On the other hand, when migrating existing systems with

AS 488 S or AS 488 K migration packages, it is necessary to ex- amine the specifications of the output systems, the local condi- tions, and further historical-based conditions more exactly.

Special ordering and handling procedures therefore apply to the AS 488 S and AS 488 K migration packages.

The AS 488 S/AS 488 K migration packages have a fixed, de- fined scope of delivery and performance with alternatives with respect to the CPU performance (75 MHz or 120 MHz) and the type of migration rack (with or without slots for TELEPERM M I/O modules for AS 488 S or with a DC 24 V or AC 230 V supply for AS 488 K). This means that only TELEPERM M I/Os can be used. Previous experience has shown that migration solutions are usually extremely specific, and deviate from the standard scope of the AS 488 S and AS 488 K migration packages. Com- ponents or system extensions, e.g. with distributed I/Os on the PROFIBUS-DP, which are not included in the standard scope can either be ordered as individual options (see section on

AS 488 S cabinet system or AS 488 K compact system) or can be the content of individual additional agreements with additive services. Additional agreements always require an individual quotation. In order to simplify the production of quotations, and to improve the cost transparency, special performance packag- es have been defined for frequently requested additional services.

■Configuration

General marginal conditions

During migration of AS 220 S, AS 230 and AS 235 automation systems to AS 488/TM, the subrack with the central modules in the TELEPERM M cabinet is replaced by an AS 488 S with com- patible functions based on the MIG I or MIG II migration rack. The AS 230 K and AS 235 K compact automation systems can also be directly migrated using the AS 488 K of identical pack- aging design. During this, the complete basic system including the power supply and the slots for connection to the CS 275 are replaced by an AS 488 K with compatible functions based on the MIG K migration rack.

Existing AS extension units (max. 7) or ES 100 K extension sys- tems (max. 8) with I/O modules of the TELEPERM M process control system, including any subordinate SIMATIC S5 I/Os, can be connected to an AS 488/TM. With mixed configurations con- sisting of extension units and systems, max. 8 (2 x 4) extension units/ES 100 K extension systems are permissible per

AS 488/TM.

The following assignments are possible per I/O bus:

•3 extension units and one ES 100 K extension system

•At least 1 extension unit and up to three ES 100 K extension systems

•Up to 3 extension units in the basic cabinet, or up to

4 extension units in the extension cabinet of an AS 230 or

AS 235 system. The ribbon cable must be replaced when us- ing 3 or 4 extension units for AS 230.

Field multiplexers and FM driver blocks (together with links) can- not be used.

When using the MIG I migration rack, the I/O modules inserted in the basic unit of an AS 220 S, AS 230 K or AS 235 K automa- tion system must be converted into extension units/systems, or they are omitted. Up to 5 I/O modules can be transferred to a MIG II or MIG K migration rack if the process signal cables are reconnected.

The AS 220 H and AS 235 H automation systems can only be in- corporated into the migration with relinquishing of redundancy. The conversion is carried out specific to the project by replacing the AS 220 H basic unit (without EE1 extension unit) or the

AS 235 H basic unit by an AS 488 S with additional adaptation to the redundant solution. In the case of the AS 235 H, technical clarification is necessary because of the different I/O conditions; these are not covered by a standard conversion.

The AS 488/TM has no local terminal for direct operation and monitoring or for configuring. Operation and monitoring func- tions comparable with the local terminal of the AS 235 are pro- vided by the PROGRAF AS+/NT configuring tool when connecting via the CS 275 system bus. A further alternative is the use of bus-coupled OS systems such as PCS7/TM-OS.

The conversion of the application software from a source AS into a target AS is carried out 1:1. The standard service does not in- clude testing for any special drivers which may be present, sub- sequently loaded structures which are incompatible (system blocks in the RAM), or overload configurations.

The application structure must be provided on diskette to enable software conversion.

7/2 Siemens PLT 112 · 2002