Configuring Hardware and Communication Connections STEP 7.pdf

Configuring Connections
12.2 Configuring Communication with an Ethernet CP
Type of Communication
The Ethernet CP supports the following types of communication, depending on the
CP type:
• S7 communication
S7 communication forms a simple and efficient interface between SIMATIC S7
stations and PGs/PCs using communication function blocks.
The CP functions as an "S7 communication relay", that passes on the block
communication on Industrial Ethernet.
• S5 compatible communication
• SEND-RECEIVE interface
Depending on the CP type, the SEND-RECEIVE interface allows programcontrolled
communication on a configured connection from a SIMATIC S7 PLC
to another SIMATIC S7 PLC, to a SIMATIC S5 PLC, to PCs/PGs, and to any
other station.
• FETCH/WRITE services (Server)
FETCH/WRITE services (Server) allow direct access to system memory areas
of a SIMATIC S7 CPU from a SIMATIC S5 system or from third-party devices.
• HTML Process Control
With the IT-CP, you use the included functions and HTML pages to enquire
about important system data by means of a web browser (see the guide to the
IT-CP).
• File management and file access via FTP
The IT-CP provides additional functions for FTP services.
Communication Services on the SEND/RECEIVE Interface
Depending on the CP type, the following communication services are available:
• ISO Transport
optimized for top performance at the self-contained manufacturing level
• TCP/IP for internet communication with
- ISO-on-TCP connections (RFC 1006) and
- UDP datagram service.
• Sending E-Mail
The controller can send messages depending on process events (see the guide
to the IT-CP).
Configuring Hardware and Communication Connections with STEP 7
12-2 A5E00706939-01