Siemens S7-300 - FETCH;WRITE Services (Server)

Communication via Ethernet CPs in S7 stations
1.7 FETCH/WRITE services (server)
Configuring and commissioning S7 CPs for Industrial Ethernet
30 Configuration Manual, 09/2013, C79000-G8976-C182-13
Nodes
The SEND/RECEIVE interface allows programcontrolled communication on Industrial
Ethernet between the SIMATIC S7 PLC and the following:
● SIMATIC S7 with an Ethernet CP
● SIMATIC S5 with an Ethernet CP
● PC/PG with an Ethernet CP
● Stations with Ethernet attachment
Figure 1-4 SIMATIC S7 PLC with possible communications partners on the SEND/RECEIVE
interface
1.7
FETCH/WRITE services (server)
Application
The FETCH/WRITE functionality on the SEND/RECEIVE interface provides further services
on configured transport connections.
The FETCH/WRITE interface is used primarily to connect SIMATIC S7 to SIMATIC S5 and
to other nonS7 stations (for example PCs).
●
FETCH
The partner on the connection (SIMATIC S5 or nonS7 station) can read system data on
the SIMATIC S7 PLC.
●
WRITE
The partner on the connection (SIMATIC S5 or nonS7 station) can write system data to
the SIMATIC S7 PLC.