5.5 DA linking of two PCS 7 projects using OpenPCS 7
Plant configuration of the OPC DA link
The PCS 7 OS servers can also be used as OPC clients. The "OPC" channel is the OPC client
application of the PCS 7 OS. Information on the configuration of the OPC channel is available
in the WinCC Information System in the section "WinCC Information System/Communication/
OPC Channel". In this configuration, the OpenPCS 7 station can make data from several OS
servers available for Project A via OPC.
Plant bus
Terminal bus
Fieldbus
PCS 7 Project BPCS 7 Project A
PCS 7 OS server
OPC channel as
OPC client
PCS 7 OS server
PCS 7 OS client
PCS 7 OS server
OPC coupling
OpenPCS 7 station
PCS 7 OS client
Scalance S 612
S7-400
ET 200
S7-400
ET 200
Application 1:
There are two PCS 7projects, Project A and Project B, in a plant network. For technical reasons,
Project A needs to visualize data of Project B. The OPC channel of the PCS‑7 OS can be
used for this purpose.
Application 2:
If PCS 7Project A and PCS 7Project B use different PCS 7versions, but support the same OPC
version: The OPC channel of the PCS 7 OS can be used for this purpose.
System configurations
5.5 DA linking of two PCS 7 projects using OpenPCS 7
OpenPCS 7
Function Manual, 05/2012, A5E02780178-02 39
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