Service and maintenance
10.1 Error and diagnostics messages
SIMATIC MV500
186 Operating Instructions, 05/2019, C79000-G8976-C494-02
Description and corrective measures
Green flashing:
The read result is valid.
No error
The reading was successful and the read result is valid
Yellow, flashing:
The read result ended with a MATCH error.
The reading was successful, but the result comparison
showed a deviation from the default (MATCH error).
Red, flashing:
The read result is invalid (N_OK).
The reading was unsuccessful or the read result is not valid
(N_OK).
Possible causes:
• The expected codes were not in the image.
• The processing time was not sufficient.
• A test condition could not be fulfilled.
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