Why Save As With Reorganization Turns NetPro Stations Orange in PCS 7

Performing 'Save As With Reorganization (Slow)' in SIMATIC PCS 7 causes automation stations (AS) and operator stations (OS) to turn orange in NetPro because the database reorganization process compacts project tables, purges deleted blocks, and updates internal database checksums, invalidating previously compiled NetPro binary caches (*.xdb). An orange background signifies that the station's communication configuration is flagged as uncompiled. There is zero risk of communication loss if you follow the prescribed engineering sequence: open NetPro, execute 'Network -> Save and Compile -> Compile and check everything' to clear the orange status, compile the CFC chart folder, and compile the OS before downloading.

The Mechanics of 'Save As With Reorganization (Slow)'

In SIMATIC PCS 7 engineering, the multiproject database accumulates fragmented space, orphaned pointers, and temporary compilation artifacts over years of continuous development. When database inconsistencies occur (such as cross-reference errors or delta download locks), Siemens technical support recommends executing File -> Save As... with With Reorganization (slow).

Unlike a standard 'Save As' which performs a simple file copy, reorganization reads every database record sequentially, rebuilds the underlying STEP 7 database indexes from scratch, and writes the compacted project to a new directory. This eliminates database bloat and repairs minor structural inconsistencies.

What the Orange Background Signifies in NetPro

When the reorganized multiproject is opened in NetPro, engineers are often alarmed to see that every AS controller and OS workstation icon is highlighted with an orange background:

Visual State Indicator: In NetPro, station colors communicate compilation status:
- White / Gray: Station network configuration is compiled and synchronized with the database.
- Orange: The station configuration or its S7 connections have been modified, or the compiled cache has been invalidated.
Checksum Invalidation: Because reorganization rebuilds internal database pointers, the timestamp and checksum of the offline hardware and connection definitions no longer match the obsolete compiled cache files (*.xdb). NetPro flags every station as requiring compilation.

Assessing Operational Risk to Running Controller Communications

A vital concern for plant engineers is whether downloading the reorganized project risks severing communications between running controllers and WinCC OS Servers. The answer is NO, provided the engineering compile sequence is executed properly:

No Logical Changes: Reorganization did not alter IP addresses, subnet masks, rack/slot assignments, or S7 Named Connection symbolic names. The physical communication endpoints remain 100% identical.
The Danger of Downloading Uncompiled Networks: Attempting to download connection tables while stations are orange will fail or download mismatched checksums. Compiling NetPro first restores perfect alignment.

Comparison of Project Cleanup Operations in PCS 7

The table below contrasts different project maintenance operations in SIMATIC PCS 7.

Maintenance OperationAction PerformedImpact on NetPro StationsWhen RecommendedStandard Save AsDirect file copy to new folderStations remain white/normalRoutine project duplication or archivingSave As With Reorganization (Slow)Rebuilds database schemas, indexes, and pointersAll stations turn orange (Invalidates cache)Resolving database corruptions or before major upgradesNetPro Save and CompileGenerates new communication binary tables (*.xdb)Clears orange color; restores normal stateMandatory after reorganization or network editsPLC Memory Reset (MRES)Wipes controller volatile RAMClears online controller stateComplete hardware commissioning only

Step-by-Step Procedure to Restore NetPro Status and Download

Follow this exact three-step engineering workflow after performing a slow reorganization:

Save and Compile NetPro:
- In SIMATIC Manager, open NetPro from the multiproject root.
- Select menu Network -> Save and Compile.
- Choose the option Compile and check everything.
- The compiler regenerates all routing tables, S7 connection endpoints, and PC station binary databases.
- Observe the NetPro canvas: the orange background clears from all healthy stations.
Compile and Download AS Program:
- In Component View, select the Charts folder of the AS.
- Compile CFC charts (Changes Only).
- Execute a CFC delta download: confirm that delta download is permitted and completes smoothly.
Compile and Download OS Project:
- Right-click the OS project in SIMATIC Manager and select Compile (Changes Only).
- Download the OS project to the target operator stations.

Verification

Verify system restoration through the following checks:
1. In NetPro, verify that all AS and OS stations display standard white/gray backgrounds with no residual orange highlights.
2. Check the NetPro compile log: ensure that compilation completed with 0 errors and 0 warnings.
3. In WinCC Explorer on the OS, check Named Connections connection status: verify that the link to the AS shows 'Connected'.
4. In runtime, confirm that process graphics display live data without invalid tag markers.

Limitations and Operational Precautions

Never execute 'Save As With Reorganization (Slow)' across a slow corporate VPN or unstable Wi-Fi network connection. Reorganization performs tens of thousands of rapid read/write disk transactions; an interrupted network connection during reorganization can fatally corrupt the project. Always execute reorganization locally on the Engineering Station's fast local solid-state drive.

Engineer FAQ

Will performing 'Save As With Reorganization' force a CPU STOP download?

No. Reorganization affects only the offline engineering database. If no technological logic was modified, compiling charts and compiling NetPro allows standard CFC Delta Downloads without stopping the CPU.

Why did a warning appear during OS compilation after reorganization?

If NetPro was not compiled first, the OS compiler issues warnings stating that connection tables are out of date. Compiling NetPro before OS compilation resolves these warnings completely.

How often should a PCS 7 multiproject be reorganized?

Siemens recommends reorganizing the multiproject before major software updates, after decommissioning large plant sections, or when experiencing unexplained database slowdowns.