The CP 1243-1 communications processor is used for connecting the SIMATIC S7-1200 to control centers via Ethernet in telecontrol applications and is also used in secure communications via IP-based networks (security functions).

Virtual private network (IPSec)

The connection of S7-1200 via a VPN network ensures that only authenticated network nodes can communicate with the controller. Secure encryption of the data and verification of the data integrity protect the data traffic from espionage and manipulation.

Stateful inspection firewall

By using a firewall, the S7-1200 can provide additional protection against unauthorized access and attempted manipulation.

The firewall filters data packets and checks the communication connections in accordance with the filter list. Both incoming and outgoing communication can be filtered based on IP and MAC addresses.

Cell protection for SIMATIC S7-1200 with CP 1243-1 (Security Integrated) e.g. safe engineering access to the S7-1200

Connection to a control center with TeleControl Server Basic

With the help of the CP 1243-1, S7-1200-based remote stations in telecontrol applications can be directly connected via an IP-based network to the TeleControl Server Basic. By using additional routers (e.g. SCALANCE M for communication via mobile wireless or DSL), it is possible to make the connection via other media.

Telecontrol application with the S7-1200 as RTU, connected via mobile wireless (CP 1242-7) and DSL (with CP 1243-1 and SCALANCE M812-1)

Connection to WinCC based or 3rd party control centers

With CP1243-1 it is possible in just a few steps to connect the remote station S7-1200 to a DNP3 or IEC 60870-5-104 based control center (e.g. WinCC or PCS7).

Telecontrol application with the S7-1200 as RTU, connected via DSL to a PCS7 control center with Telecontrol Add On

Completely configurable application using "data point configuration"

"Data point configuration" in STEP 7 eliminates all programming effort for transmission of data to the control center.

The data of the CPU relevant to the control center is selected via user-friendly "item browsing" in STEP 7. In a clearly-arranged menu, the data transfer parameters are then assigned to the data points selected in this way. The cyclic or event-controller transfer of measurements, setpoints or alarms can thus be implemented in only a few operations and without programming effort.

Data buffering

Data losses are prevented by the data buffering mechanisms integrated in the product.

In the event of a connection failure, up to 64,000 time-stamped values are buffered. When the connection returns, the buffered values are automatically transferred to the control center in the right order.

DNP3 protocol

Communication with the control center is based on the established standard of DNP3 specification 2 (2007/2009).

Thanks to support of the object and data transfer mechanisms defined in the specification, compatibility with PCS 7, WinCC (with corresponding telecontrol packages), and all other control center systems available on the market is ensured.

The security mechanisms already defined in the DNP3 standard for secure data transfer through trunk networks are fully supported.

IEC 60870 standard

Communication with the control center is based on the established communication standard in accordance with IEC 60870-5-104. This ensures that telecontrol and instrumentation and control devices and systems from Siemens or other vendors can communicate with each other without any fundamental adaptations. The variance and variabilities provided by this standard allow different vendor-specific profiles (e.g. the frame types and functions used). The profiles can be coordinated with each other with the help of an interoperability list. This standard has become widely used, especially in Europe and Asia. The IEC 60870-5-104 telecontrol protocol is also suitable as a field or station bus. Use as a station bus also enables direct communication between individual devices.

Email alerts

Email alerts can be configured for timely provision of station states to service or maintenance personnel. When previously defined events (such as threshold violation) occur, application-specific information is sent automatically by email.

Diagnostics

The CP1243-1 offers comprehensive diagnostic options for quick and informative analysis of the station status and VPN connections. Elementary diagnostic information is signaled directly via LEDs at the CP.

Extensive information, such as connection history, buffer status and transferred measured values, can be called up via STEP 7.

Remote maintenance

For remote access from the control center to the substation, the CP provides a remote maintenance port parallel to process operation. This ensures monitoring access for firmware updates or program changes.

Interfaces

The CP1243-1 has an Ethernet interface. The S7-1200 can be connected directly via an existing network, or using additional routers via other media (e.g. SCALANCE M for mobile wireless communication).

Power supply

Extra wiring for the CP power supply is not required. Power is supplied directly via the backplane bus of the S7-1200.