How to Update a WinCC Picture on PCS 7 OS Servers Without a Full Download

For a PCS 7/Open OS V9.1 SP1 project, edit the graphics on the OS Engineering Station and use the supported “Load Online Changes” workflow when the change is eligible for a changes-only download. Siemens documents that changes are initiated from the Primary Server OS in SIMATIC Manager, with a redundant Standby included and client updates handled in the background. Copying a PDL directly into a live server folder bypasses that engineering-and-download workflow; the available documentation does not guarantee that a direct file copy will update Runtime or all clients.

Applicability and architecture

The exact PCS 7 release and whether the two servers form a redundant pair are not stated in the report. The detailed workflow below is documented in Siemens' PCS 7/Open OS Setup Guide, Equipment Manual 08/2022, A5E51387645-AB, for PCS 7/Open OS V9.1 SP1. Apply it only if that configuration matches the installation; use the corresponding release documentation for other PCS 7 versions or architectures.

The question is whether a graphics change can be made effective without a full OS project download. PCS 7 distinguishes an engineering-side change followed by a “Load Online Changes” (delta download) from manually copying a file to a runtime server. A delta download is still a download; it is not a no-download method.

Recommended method: edit at the OS Engineering Station

Use this method when maintaining the PCS 7/Open OS project and the picture edit is supported by changes-only download for the installed version.

Back up the OS project using the site's approved procedure and confirm the target project and server roles before making changes.
On the OS Engineering Station, open the OS Server project in WinCC Explorer and modify the existing picture or create the required graphic there. Siemens' Open OS guide specifically directs graphics changes to the OS Engineering Station to preserve changes-only download behavior.
Save the project and use the installed release's documented compile/download workflow. For a supported online change, in SIMATIC Manager Component View right-click the Primary Server OS PC Station and select PLC > Download.
Select Changes in the download dialog. Start the transfer and acknowledge completion. The guide states that, for a redundant pair, the configured Standby is downloaded first and the Master follows; both partners must be online for the “Changes” choice to be available.
Keep the client projects in the intended server package configuration. The guide says the client update is performed in the background and is not shown as a separate client download in this workflow.

Do not assume every OS modification qualifies for delta download. Follow compile warnings and the release-specific restrictions. Siemens documents some changes that require a full compile and full download.

Why direct PDL copying is not equivalent

A PDL file is part of a WinCC project, but a file copy to one server is not the documented PCS 7/Open OS engineering workflow for distributing OS changes. The Siemens guide says graphics changes should be made on the OS Engineering Station to preserve Changes Only downloading; changes made on another station cannot be distributed to other stations through SIMATIC Manager in the same way and would have to be downloaded manually. It also warns that changes made outside the Engineering Station affect later download requirements.

Therefore, the forum reply's reported technique—copying a picture to Server 1 and then navigating between pictures—should be treated as a case-specific observation, not as a documented guarantee of Runtime refresh, server redundancy synchronization, or client behavior. The sources reviewed do not define a safe universal procedure for manually replacing one active PDL file on a server.

When a full download may be required

Use the full compile/download route when the installed version's compiler or project configuration requires it, or when the change is outside the supported delta-change set. In the Open OS V9.1 SP1 guide, deleting an object from Plant View and later adding the same object back is specifically not to be handled by Load Online Changes; the guide requires a Full Download. It also identifies cases requiring a full DBA compile followed by Full Download.

Those examples concern project/DBA changes, not every picture edit. Do not generalize them into a rule that all graphics changes need a full download or that all graphics changes are delta-loadable. Use the exact project's compile dialog and applicable version documentation.

Verification

After transfer, check the download completion status and open the changed picture through the normal operator navigation on the relevant Runtime stations. Confirm the displayed revision is the intended one on the Primary/Master, Standby where applicable, and each client expected to receive it. Test relevant picture navigation and any picture-linked controls in an approved test or maintenance window before relying on the display operationally.

The report's observation that a picture appeared updated after navigating away and back is not enough to establish consistency across all stations. Record which transfer method was used and verify the actual runtime views.

Limitations and Operational Precautions

The source does not identify PCS 7/WinCC versions, whether the pair is redundant, picture type, project-sharing arrangement, or whether Runtime was active during the copy. The Siemens procedure cited here is specifically the PCS 7/Open OS V9.1 SP1 guide. Standard PCS 7 installations and other releases may have different prerequisites and supported change sets.

A change-only transfer updates runtime project data while the system is operating, so coordinate it under the site's change-control and operating procedures. Confirm backups, project consistency, approved timing, and rollback before changing a live OS. Never use direct copying to override redundancy or client distribution behavior without a version-specific Siemens procedure.

Engineer FAQ

Can I copy the PDL directly to Server 1 instead of downloading? The cited Siemens PCS 7/Open OS workflow does not establish direct replacement of a live PDL as a reliable way to update the runtime picture or propagate it to clients. Edit at the OS Engineering Station and use the applicable supported download path.

Does “Load Online Changes” mean no download is needed? No. It is the changes-only/delta download option; the changed data is still transferred from the engineering project to the operator stations.

Will PCS 7 update the redundant Standby and clients? In the cited PCS 7/Open OS V9.1 SP1 workflow, a download initiated from the Primary includes the configured Standby, and client transfer occurs in the background. Confirm both partners are online for the redundant changes-only option and verify behavior for the installed version.

Do picture edits always qualify for delta download? The source and cited guide do not establish a universal rule for every picture/project change. Follow the installed release's compiler indications and change-only limitations; perform a full compile/download when required.

Technical References

Siemens, PCS 7/Open OS Setup Guide, Equipment Manual 08/2022, A5E51387645-AB, Sections 8.4 “Modifying the Project in WinCC” and 8.5 “Downloading Changes,” especially 8.5.2.1 “Loading Online Changes,” pp. 68–70. The guide specifies making graphics changes on the OS Engineering Station and describes the Primary/Standby/client delta-download sequence: https://cache.industry.siemens.com/dl/files/849/109808849/att_1115209/v1/PCS7_Open_OS_Setup_Guide_en.pdf
Siemens, WinCC V7.5 SP1: WinCC – Working with WinCC, System Manual 11/2019, A5E47940912-AA, section “Load Online Changes,” including prerequisites and supported elements. This is general WinCC documentation; apply its details only where the installed PCS 7/WinCC combination supports them: https://cache.industry.siemens.com/dl/files/058/109773058/att_1002745/v1/WinCC_Working_with_WinCC_en-US_en-US.pdf

How to Update a WinCC Picture on PCS 7 OS Servers Without a Full Download