Instructions:

Software requirements:

• S7-200 PC Access OPC Server V1.0.0.56
• WinCC flexible 2004 Advanced
• WinCC flexible 2004 Runtime

Hardware requirements:

• S7-200 communications cable
• S7-22x CPU
• PC

A further requirement is that a properly functioning STEP 7 Micro/WIN project is available and loaded into S7-200 CPU.

Configuring the OPC server with S7-200 PC Access

• Start S7-200 PC Access via Start > SIMATIC > S7-200 PC Access V1.0.0.56 > S7-200 PC Access.
• Create a new project.

Fig. 01

• Mark controller, e.g. "MicroWIN (CP5611(PPI))", and open the dialog Status > PG/PC Interface....
• As access point of the application you must set "Micro/WIN" with the existing communications connection to the S7-200, e.g. "-->CP5611(PPI)".

Note:
If the access point is not "Micro/WIN", first close the dialog and set the access point via Control Panel > Set PG/PC Interface.

• Close the dialog via OK.

Fig. 02

• Via File > Import Symbols you import the symbol of the selected STEP 7 Micro/WIN project.
• Then save the configuration you have created.
• In S7-200 PC Access you can now access the symbol of the STEP 7 Micro/WIN project.

Fig. 03

• If you mark the project folder "Project1", for example, you can check the address of the PLC via Edit > Properties.

Fig. 04

Checking the connection with Test OPC Client of S7-200 PC Access

• Mark the symbols in the right-hand project pane of S7-200 PC Access.
• Using drag and drop add the marked variables as items to Test Client (bottom project pane).

Fig. 05

• Enable Test Client via Status > Start Test Client.
• If "Good" is displayed for Quality, the variable has been read successfully out of the S7-200 controller.

Fig. 06

WinCC flexible Runtime as OPC client

• Start WinCC flexible 2004 Advanced.
• Create a WinCC flexible project for a PC via PC > WinCC flexible RT.
• In the project tree double-click on Communication > Connections to create a new connection.
• As communications driver for the connection select OPC.
• Select "S7200.OPCServer" for OPC server.

Note:
If the S7-200 OPC server has not been started on the local PC, you must specify the computer name or the IP address of the remote PC on which the S7-200 OPC server is located. When accessing the OPC server via network, please refer to the DCOM settings in the WinCC flexible Online Help under "Communication > OPC > Commissioning the OPC > DCOM".

Fig. 07

• Add a variable under Communication > Variables.
• Via Symbol you select the relevant item of the S7-200 OPC server.

Fig. 08

• You can display this variable via an input/output field in the Start picture.
• Save the configuration.
• Start WinCC flexible Runtime via the icon in the toolbar.

Fig. 09 

Fig. 10