AS-Interface Master

Masters for SIMATIC S7

CP 243-2

■Overview

 

■Application

The CP 243-2 is the AS-Interface master for the new generation of SIMATIC S7-200. The communications processor (6GK1 243- 2AX01-0AX0) supports the expanded AS-Interface specification

V2.1 and has the following functions:

•Connection of up to 62 AS-Interface slaves and integrated an- alog value transmission (according to expanded AS-Interface Specification V2.1)

•Supports all AS-Interface master functions according to ex- panded AS-Interface Specification V2.1

•Display of operating status and operational readiness of the connected slaves through LEDs in the frontplate

•Display of errors (incl. AS-Interface voltage errors, configura- tion errors) through LEDs in the frontplate

•Compact housing in the design of the innovative SIMATIC S7-200 generation

The CP 243-2 is the AS-Interface master connection exclusively for the CPUs 22x of the innovated SIMATIC S7-200 generation. By connecting to AS-Interface, the available digital inputs and outputs for S7-200 are significantly increased (max. 248 DI / 186 DO on AS-Interface per CP).

In addition, the integrated analog value processing also makes analog values (per CP max. 31 analog slaves, each with up to

4 channels) available to the S7-200 at the AS-Interface. Up to two CP 243-2s can be operated simultaneously on the S7-200.

■Design

The CP 243-2 is connected to the S7-200 like an expansion module. It features:

• Two terminals for direct connection of the AS-Interface cable

• LEDs in the front panel for displaying the operating status and the operational readiness of all connected and activated slaves

• Two pushbuttons for displaying the status information of the slaves, for switching the operating status and entering the existing ACTUAL configuration as the SETPOINT configuration

■Function

The CP 243-2 supports all functions stipulated in the expanded

AS-Interface Specification V2.1. Double address assignment

6

(A-B) makes it possible to operate up to 62 digital or 31 analog

slaves at the AS-Interface.

Access to analog values is just as easy as access to digital val- ues, thanks to the integrated analog value processing.

The CP 243-2 occupies one digital input byte (status byte), one digital output byte (control byte) and 8 analog input and 8 analog output words in the process image of the S7-200. This means that the CP 243-2 occupies two slots. The operating mode of the CP 243-2 can be set with the status and control byte through the application program.

Depending on the operating mode, the CP 243-2 either stores the I/O data of the AS-Interface slaves or diagnostic values in the analog address space of the S7-200 or enables master calls (e.g. readdressing of slaves).

■Benefits

•More flexible and extended application options of the SIMATIC S7-200 due to the considerable increase in the available digital and analog inputs/outputs

•Shorter startup times due to easy configuration at the press of a button

•In the event of a fault, shorter standstill and service times due to LED indication of:

•Status of the CPs

-connected slaves and their operational readiness

-monitoring of the AS-Interface voltage level

All connected AS-Interface slaves are configured at the press of a button. No further configuration of the CP is necessary.

Siemens IK PI · 2004

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Siemens EN 50295 manual Overview Application
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EN 50295 specifications

Siemens EN 50295 is emerging as a pivotal standard in the domain of electrical safety and design, particularly relevant for the electrical industry and equipment manufacturing sectors. Primarily, this European Norm is geared towards ensuring the safety of electrical systems used in dry environments, which is essential for various industrial applications.

One of the main features of the EN 50295 standard is its comprehensive safety requirements which are aimed at mitigating the risks associated with electrical systems. This includes aspects like insulation resistance, protective earthing, and the management of electrical faults. By setting a benchmark for safety, Siemens EN 50295 assists manufacturers in maintaining compliance with national and international regulations, thus protecting both users and equipment.

The standard emphasizes the importance of safety measures in the design process. It outlines criteria for components, assembly methods, and system installation, ensuring that electrical equipment operates stably and gets rid of risks related to electrical failures. This involves rigorous testing of materials and components, which enhances their reliability and longevity while providing efficient overall operation.

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Another characteristic of the EN 50295 standard is its adaptability. The framework it provides can be customized depending on specific industry needs, making it versatile across various sectors such as manufacturing, construction, and transportation. This adaptability ensures that businesses can maintain high safety standards while still allowing room for innovation and modern practices.

In summary, Siemens EN 50295 presents a well-rounded approach to enhancing safety, reliability, and sustainability in electrical systems. Its features and characteristics are set to guide industries in making informed decisions regarding electrical configuration, ultimately fostering a safer and more efficient working environment. The incorporation of emerging technologies ensures that the standard remains relevant in a fast-evolving technological landscape, proving to be an invaluable asset for manufacturers and service providers alike.
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