Opening and Testing PCS 7 OS Projects Offline on a Standalone Field Laptop

When an archived multi-station or server-client PCS 7 OS project is retrieved onto a standalone engineering laptop, WinCC Runtime opens as a blank gray screen with no graphics or objects. In a multi-station architecture, runtime graphics and tags are hosted by dedicated OS Servers, while client projects rely on server data packages and terminal bus connections that do not exist on a disconnected laptop. To view and test runtime graphics offline, open the OS Server project directly in WinCC Explorer, change the computer name to the laptop's local Windows hostname, configure the startup screen in Computer Properties, and launch WinCC Runtime.

Architecture of Multi-Station OS Projects vs Standalone Operation

In production SIMATIC PCS 7 systems, the Operator Station environment is distributed across dedicated nodes:
* OS Server (6ES7652-0XX08-1XB0): Hosts the primary process tags, communication channels to S7-400 controllers, alarm logging databases, and technological archive segments.
* OS Client (6ES7652-0CX08-1XB0): Runs a lightweight client project that loads server data packages (*.pck) over the terminal bus and displays process graphics stored either centrally on the server or replicated locally.
* Engineering Station (6ES7651-5AA58-0YA5): Houses the complete Step 7 multiproject, CFC charts, and OS station configurations.

When an engineer retrieves an archived multiproject (.zip or .s7p) onto a field laptop to verify graphics, the laptop lacks the physical terminal bus, domain controllers, and redundant server connections. If the engineer attempts to launch WinCC runtime from an OS Client project, the runtime client cannot establish RPC/DCOM connections to the non-existent server, resulting in a blank startup screen, missing faceplates, and communication aborts.

Why Retrieved Projects Display Blank Runtime Screens on Laptops

Several interdependent factors cause blank runtime screens when opening retrieved projects offline:

Fault FactorMechanism in Standalone EnvironmentObserved SymptomOS Client StartupClient cannot locate server prefix or load .pck server package.Blank gray screen (@screen.pdl fails to load picture windows).Computer Name MismatchProject registered under plant server name (e.g., SRV_A), not laptop name.WinCC opens in remote/restricted mode; runtime startup blocked.Missing Start ScreenStartup screen property blank in Computer Properties.Graphics runtime activates but displays no initial PDL graphic.Missing Simatic RightsWindows user on laptop is not a member of SIMATIC HMI group.SQL Server database attachment fails; DCOM access denied.Tag Channel DisconnectedS7 Protocol Suite points to physical CP 1623 MAC/IP address.Dynamic process values display yellow exclamation marks / invalid status.

Table 1: Root causes of offline WinCC runtime failures on standalone laptops.

Step-by-Step Procedure to Test OS Projects Offline on a Laptop

Follow this sequence to configure an OS Server project for offline runtime visualization on a standalone laptop:

Verify Windows Security Rights:
* Open Windows Computer Management (compmgmt.msc) on the laptop.
* Navigate to Local Users and Groups > Groups.
* Ensure your current Windows user account is a member of SIMATIC HMI, SIMATIC NET, and Administrators.
* Run SIMATIC Security Controller to repeat security adjustments.
Open the OS Server Project (Not Client):
* In SIMATIC Manager, navigate through the component view to the OS Server object (not an OS Client).
* Right-click the OS Server and select Open Object to launch WinCC Explorer.
Synchronize Computer Name:
* In WinCC Explorer, click Computer in the tree.
* Right-click the computer entry in the right pane and select Properties.
* Click the Use Local Computer Name button.
Configure Graphics Startup and Start Screen:
* In Computer Properties, switch to the Startup tab.
* Ensure Graphics Runtime is checked under Additional Tasks.
* Switch to the Graphics Runtime tab.
* Under Start Screen, click Browse and select @screen.pdl (standard PCS 7 base screen) or a specific technological overview picture (e.g., Overview.pdl).
* Under Window Attributes, enable Title, Menu Bar, and Maximize.
* Click OK.
Activate WinCC Runtime:
* Click the Activate button in WinCC Explorer.
* Verify that WinCC runtime launches and renders process graphics and block icons.

Converting Server-Client Configurations for Standalone Simulation

If you only have an OS Client project and need to test pictures locally:
* Open the OS Client project in WinCC Explorer.
* Navigate to Server Data, right-click, and select Delete or remove broken server package links.
* In Computer Properties, change the project type from Client Project to Single-User Project temporarily.
* Re-point graphic links from server prefix format (ServerName::@screen.pdl) to local picture files.
* For dynamic tag testing, use the WinCC Tag Simulator (Start > Siemens Automation > WinCC > Tools > WinCC Tag Simulator) to simulate analog setpoints and binary feedback signals without a physical PLC.

Verification

To confirm successful offline operation:

Verify that WinCC Explorer status bar shows Database Connected and displays the laptop hostname.
Click Activate: confirm the progress dialog steps through CCProjectMgr, Alarm Logging, Tag Logging, and Graphics Runtime.
Verify that the configured start screen renders with plant background graphics, navigation hierarchies, and block icons.
Open the WinCC Diagnosis window or check WinCC_Sys_01.log in C:\Program Files (x86)\Siemens\WinCC\Diagnostics\ to ensure no fatal SQL connection drops exist.

Limitations and Operational Precautions

Operating an OS Server project in standalone mode with modified computer names is strictly for offline testing and visualization; never download this modified project back to a production OS server without restoring original server paths in SIMATIC Manager.
S7-400 communication will be offline unless S7-PLCSIM is active with the S7 Protocol Suite configured to MPI/Named Connections.
Standalone laptops require valid WinCC RC (Engineering) or RT (Runtime) licensing; running in demo mode will cause periodic runtime license popup reminders.

Engineer FAQ

Can I run both S7-PLCSIM and WinCC on the same laptop for offline testing?

Yes. Launch S7-PLCSIM, download the S7-400 hardware and CFC program, open WinCC Explorer, and ensure the S7 Protocol Suite / Named Connections channel is mapped to PLCSIM in the Set PG/PC Interface utility.

Why are faceplates failing to open when clicking block icons offline?

Standard APL faceplates require the Basic Process Control structure pictures (@pg_*.pdl) and valid tag connections. If server data is missing or tags are disconnected, faceplate scripts will log error messages in the diagnosis buffer.