Server-client Architecture

Multiproject

Dividing the multiproject into functional units is recommended in principle in PCS 7 (e.g. one project per unit). This setup provides the maximum flexibility during the configuration and commissioning phase. This applies in particular to automation systems (AS). This way the configuring engineer responsible for one or more automation systems (AS) can, for example, uncouple the appropriate project from the multiproject and configure this project separately.

The multiproject ("Comp_MP" in the following example) should consist of the following parts:

• Project "01_PLANT_A" for a unit consisting of fault-tolerant AS

• Project "02_PLANT_B" for a unit consisting of standard AS

• Project "25_ES" for one or more engineering stations

• Project "20_OS" for the redundant OS server pair and an OS client

• Project "21_CL", for OS clients of the same type as typical operator stations

• Master data library "Comp_Lib"

The division of the multiproject into various projects is determined by technological and local circumstances, as well as by specific project factors, such as the number of project engineers or the delineation of responsibilities.

When PROFINET is used, it must be ensured when dividing the multiproject into individual projects that all stations that share a PROFINET network are in the same project. The functions of HW Config, e.g. topology configuration (automatic commissioning), can then be used.

A redundant OS server pair must always be created in the same project. Referenced operator stations must be created in the same project as the reference.

Once the projects are created the corresponding structure is displayed in the component view of the SIMATIC Manager.

OS Server

The following steps show you how to insert and configure OS servers in the project:

1. Insert a new PC station into the subproject "20_0S" by selecting the project and selecting the "Insert New Object > Preconfigured Station ..." via the shortcut menu. The PCS 7 Wizard executes.

2. Click "Next" without selecting a CPU.

3. Select the "PCS 7 OS" option box and the "Multiple station system redundant" option.

4. Terminate the PCS 7 wizard. The following structure is created in the component view for project "20_OS":

5. Rename the three new PC stations. The names "SERVER1A", "SERVER1B" and "CLIENT01" are used in the example project "Comp_MP".

6. Change the name of the OS object of station "SERVER1A" to "OS1".

7. Open the properties dialog of the "OS1" and click on the "Target OS and Standby OS" tab.

Make the following settings:

• Enter the path for the target OS computer. A shared folder with write access must be available on the target OS.

• Enter a meaningful name for the symbolic computer name. The symbolic computer name determines the server prefix and therefore the server data. It is decisive for the OS server-client communication. Avoid any special countryspecific characters with this. This setting can only be entered with the initial configuration.

• Select "OS1_Stby" from the selection menu in the "Standby OS" area.

• Select the "Transfer to external archive server" check box if necessary.

8. Open the properties dialog for the assigned standby OS and enter the path for the corresponding target OS computer here as well.

9. Open the SERVER1A configuration dialog and configure the CP1623 as a network adapter for the system bus in a free row. Use unique MAC addresses for this and assign a subnet with the name "Plantbus".

10.Select time of day mode in the "Options" tab of the CP1623 properties dialog.

11.Configure SERVER1B in the same way as SERVER1A.

12.Transfer the PC station configurations from the SIMATIC Manager to both the OS servers via the "PLC > Configure …" command.

13.Load the configuration via the "PLC > Download…" command in the program. The following figure illustrates the configuration of the system bus, whereby all tasks are performed from the central ES.

OS Clients

By creating the stations in the project "20_OS" an OS client station has already been created which was renamed to "CLIENT01" in the previous section.

This OS client can be configured and started accordingly in the later configuration stages. Furthermore the connection to OS servers already activated can also be tested.

The OS clients for the plant operator are created later once the configuration is complete in the separate project "21_CL".

The following steps demonstrate how to create the station "CLIENT02":

1. Copy the completed station "CLIENT01" from project "20_OS" to project "21_CL" and rename it to "CLIENT02".

2. Rename the OS client project in the SIMATIC Manager as "CL02".

3. Enter the path for the target OS in the object properties.

A shared folder with write access must be available on the target OS. OS reference clients are always used when all settings on several OS clients are identical. Each configured OS client can be used as a basis for further clients. Creation and maintenance efforts along with the project scope for operator stations are reduced considerably as a result.

In the example project, the stations "CLIENT03" and "CLIENT04" should be identical to station "CLIENT02".

The following steps demonstrate how to configure the stations "CLIENT03" und "CLIENT04":

1. For the number of identical clients configure a PC station for each with "WinCC Appl. Client Ref".

2. Configure the OS basis and the path to the target OS computer in the object properties of the OS project created within "WinCC Appl. Client Ref". A shared folder with write access must be available on the target OS.

3. Select the appropriate project from the existing OS client projects in the "OS Basis" field.

The station "CLIENT03" is identical to station "CLIENT02" in project "Comp_MP". In this case the OS project "CL02" can be used as a basis for station "CLIENT03". The path to the target OS computer is set on the station "CLIENT03".

If the settings for a referenced OS client change in relation to the base client, a new base client must be created.

Ethanol Project