Siemens SIMATIC NET S7-300 Manual page 18

1 Communication via Ethernet CPs in S7 Stations
S PG/OP communication
PG/OP communication is used to download programs and configuration data,
to run tests and diagnostic functions, and to control and monitor a plant from
OPs.
S S7 communication
S7 communication forms a simple and efficient interface between SIMATIC S7
stations and PGs/PCs using communication function blocks.
S S5-compatible communication with SEND/RECEIVE interface
Depending on the CP type, the SEND/RECEIVE interface allows
program-controlled 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.
Depending on the CP type, the following communications services are available
on the SEND/RECEIVE interface:
- ISO Transport
optimized for top performance at the self-contained manufacturing level
- TCP/IP for internetwork communication with
ISO-on-TCP connections (RFC 1006), TCP connections and
UDP datagram service (including broadcast / multicast).
- Sending E-mail
The controller is capable of sending messages triggered by process events
(refer to the IT-CP manual for details /5/).
S S5-compatible communication with FETCH/WRITE services (server)
The FETCH/WRITE services (server) allow direct access to the system
memory areas on the SIMATIC S7 CPU from SIMATIC S5, SIMATIC PC
stations, or from devices of other ranges.
Depending on the CP type, the following communications services are available
for FETCH/WRITE access:
- ISO Transport
optimized for top performance at the self-contained manufacturing level
- TCP/IP for internetwork communication with
ISO-on-TCP connections (RFC 1006), TCP connections.
S PROFINET IO
PROFINET is a standard of the PROFIBUS Users organization defining a
heterogeneous communications and engineering model.
- PROFINET IO controller
The S7 CPs that support the PROFINET IO controller mode allow direct
access to IO devices over Industrial Ethernet.
- PROFINET IO device
A -18
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07