Redundancy and comprehensive safety features ensure high availability and security. Key applications for the CP 1243-8 IRC include distributed plants in the fields of drinking water supply and distribution, sewage networks, and stormwater retention basins. Furthermore, the communication processors can be used for environmental monitoring and as local transmission and distribution networks for district heating and electricity grids.
Connected RTUs communicate via public or private networks. An industrial router (such as those in the Siemens Scalance M product range) can be connected to the device's Ethernet port to establish an internet or mobile connection. Additional connections for analog or private wireless networks can be established using separate modules. The CP 1243-8 supports both cyclic and event-driven transmission of all types of data required for process control and also offers alarm functions. The device can transmit measurement values ​​from remote stations to control centers or higher-level stations and send automated emails and text messages to maintenance personnel. To prevent data loss in the event of a connection failure, the communication processor continuously saves timestamped measurement values. As soon as the connection is restored, the temporarily stored values ​​are automatically transmitted to the control center in the correct chronological order.
To improve availability, the CP 1243-8 IRC offers the option of establishing an additional connection via the second WAN interface (for path redundancy). This is achieved by connecting a teleservices (TS) module—such as an RS-232 serial interface or a dial-up modem (analog, ISDN, and GSM)—to the second WAN interface. Users can operate with either interface, or both simultaneously.
Comprehensive diagnostic options (whether local via error messages on the LED display, in the Simatic Step 7 engineering tool, or via a web server) provide quick and informative analysis of the station's status. This allows users to quickly and easily configure connections to new modules with data point configuration in Step 7. In the Step 7 Professional engineering software of the TIA portal, the user simply selects the data to be transferred from the Simatic S7-1200 CPU and specifies the desired communication parameters.
Furthermore, the new communication processor is equipped with comprehensive security features such as a firewall (status inspection) and VPN protocol.

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