Download a PCS 7 V9.1 OS Project Across the Terminal Bus

For a PCS 7 V9.1 OS download to a server on a separate terminal bus, use the project's network share and configure the target PC station through the intended terminal-bus interface; a mapped drive letter did not work in the reported case. Siemens' PC-station configuration procedure selects a local network connection and target computer. The engineer also resolved name selection with host-file entries and adapter metrics, but those network changes must match the site topology and IT policy.

Use an Accessible Shared Path

The source reports that the mapped network-drive approach failed and that a shared network folder resolved the project transfer. Use the approved UNC share for the target OS project and confirm the engineering and target accounts have the required access. Avoid relying on a drive letter that may be mapped only in an interactive user session.

Select the Terminal-Bus Network

Siemens' PC Configuration manual requires the Engineering Station and target PC station to be linked by at least one network and provides a local network connection selector during PC-station configuration. Select the interface that reaches the target over the terminal bus, then update the accessible target-computer list and choose the intended OS server.

Resolve the Target Station Name

The source says it added each computer's terminal-bus IP and hostname to the Windows hosts file and adjusted network adapter metrics. This can make name resolution and route selection consistent in a multihomed system, but is not a universal PCS 7 recipe. Verify names and addresses with IT and keep terminal-bus and plant-bus paths aligned with the approved network plan.

Configure and Download the PC Station

Open the PCS 7 project in SIMATIC Manager and select the target PC station.
Use the documented PC-station configuration/download workflow and select the terminal-bus network connection.
Refresh the target list and select the OS server by its configured station identity.
Confirm the OS project's shared transfer path and permissions.
Configure and download the station using the project's approved sequence; review any error messages and station logs.

Verification

Confirm that the OS server is reachable and visible through the terminal-bus adapter, the intended shared folder is accessible, and the PC-station configuration/download completes. Then verify the OS project can be opened and runtime communication is healthy.

Limitations and Operational Precautions

The source does not include the original error image, share permissions, adapter configuration, DNS design, or exact Windows version. Do not change interface metrics or host mappings without network-owner approval; errors can redirect management, terminal, or plant traffic.

Engineer FAQ

Use a shared path and explicitly select the terminal-bus network connection in the PC-station workflow. Verify station-name resolution and network routes; the source's hosts-file and metric changes were local to its topology.

Technical References

Siemens, PCS 7 Software Update V9.1, §7.10 “How to configure and download the PC stations”: https://support.industry.siemens.com/cs/attachments/109794380/ps7swm_b_en-US.pdf
Siemens, PCS 7 – PC Configuration (V9.1), network and PC-station requirements: https://support.industry.siemens.com/cs/attachments/109794377/ps7pck_b_en-US.pdf