Troubleshooting; Simatic Memory Card Cannot Be Read; Check Data Integrity On The Simatic Memory Card - Siemens SIMATIC S7-1500 Manual

Diagnostics

7.3 Troubleshooting

7.3 Troubleshooting
7.3.1

SIMATIC Memory Card cannot be read

Cause
When the TM NPU writes data to the SIMATIC Memory Card, the files must be opened with
write access.
The application must ensure that files are closed after the write operation. If the SIMATIC
Memory Card is removed from the module during the write operation or if the power supply
is interrupted, the files cannot be closed correctly. This results in a defective file system on
the SIMATIC Memory Card.
Further procedure
A SIMATIC Memory Card with a defective file system must not be used further.
Microsoft Windows Explorer may show files, but these files cannot be deleted. New files
cannot be created on the SIMATIC Memory Card. Data on the SIMATIC Memory Card are
inconsistent.
For further use, the SIMATIC Memory Card must be formatted and reconfigured on the
computer using TIA Portal.
"Online formatting" with the TIA Portal is not possible!
7.3.2

Check data integrity on the SIMATIC Memory Card

Cause
One possible cause of Save errors is interruption of the power supply to the TM NPU.
If this happens, check the data on the SIMATIC Memory Card for integrity.
Identification of files with errors
Newly created files and files that are opened with write access are identified by the file
extension .dirty.
If a file cannot be closed correctly, this .dirty file extension is retained.
If an identically named file with file extension .dirty already exists, additional files are
created, and the extension is incremented by 1.
Example: file.dirty.1 --> file.dirty.2.
The file extension .dirty is retained in the following cases:
• The SIMATIC Memory Card is removed while a file is open with write access.
• The power supply is interrupted while a file is open with write access.
• The SIMATIC Memory Card is already full.
If a file can be closed, it is renamed with the correct file extension.
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Technology Module TM NPU
Equipment Manual, 07/2023, A5E46384784-AC