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Entry type: FAQ Entry ID: 58112130, Entry date: 07/27/2018

What are the functional differences between the different log storage locations in the SIMATIC Comfort Panels and Runtime Advanced?

  • Entry
  • Associated product(s)
List and description of the different log formats.

There are different storage locations available depending on whether you are using a Comfort Panel or a Runtime Advanced.

The following storage locations are available for Comfort Panel:

  • RDB file
  • CSV file (ASCII)
  • TXT file (Unicode)

The following storage locations are available for Runtime Advanced:

  • RDB file
  • CSV file (ASCII)
  • TXT file (Unicode)
  • Database

Fig. 01

Below are descriptions of the different log storage locations:

No. Storage location / Description Features
1 RDB file:
The data is stored in a proprietary database with rapid access. Logs in this format can be read and displayed by WinCC Runtime Advanced and the Comfort Panels. To be able to use the data without WinCC Runtime Advanced and the Comfort Panels, you can use the system function "CopyLog" to convert the RDB file into the CSV format.
RDB is the recommended storage system.
If you need optimum read performance in Runtime, then you should use the "RDB file" storage location.

The SIMATIC HMI Comfort Panels provide power-failure protection for logs in the RDB file storage location. The power-failure protection guarantees data consistency in combination with a special SIMATIC HMI Memory Card 2 GB, article number 6AV2181-8XP00-0AX0.

2 CSV file (ASCII):
The data is stored in a CSV file in the ASCII Standard format.
If you want to read or evaluate the logged data without WinCC Runtime Advanced, then you should use the "CSV file (ASCII)" storage location.

Quotation marks or multiple characters are not permitted as separators in the "File - CSV (ASCII)" storage location. The setting for separators is to be found under "Start > Settings > Control Panel > Regional and Language Options".

3 TXT file (Unicode):
The data is saved in the Unicode format. This file format supports all the characters used in WinCC Runtime Advanced and the Comfort Panels. For editing you need software that can store Unicode, like Notepad, for example.
Use the "TXT file (Unicode)" for logging Asian texts/characters.
4 Database:
Data is stored in a database for which ODBC access has been arranged by the administrator of the PC.
The Database storage location can only be configured when you configure a Runtime Advanced.

If an entry is triggered before the logging cycle and the Comfort Panel is switched off before the logging cycle is completed, that entry will be missing in the log.

Further Information

  • See the application example "Archiving of Process Values and Messages with WinCC (TIA Portal)" in
    Entry ID: 109746939.
    The application example provides a selection help for the various archiving concepts. This gives you the opportunity of creating a concept/solution before actually configuring archives or logs.
  • How to archive tags and messages in an SQL database with WinCC (TIA Portal) Advanced is described in the FAQ response in
    Entry ID: 61886098.

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Additional Keywords
Storage location, Power-failure protection


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