Service and maintenance
10.1 Error and diagnostics messages
SIMATIC MV500
186
Operating Instructions, 06/2018, C79000-G8976-C494-01
LED
labeling
Meaning
Description and corrective measures
READ
Green flashing:
The read result is valid.
No error
The reading was successful and the read result is valid
(OK).
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.
Diagnostics during the "READ" function
The following table shows possible errors displayed by the "READ" LED during execution of
the "READ" function.
Table 10- 6 Display of operating states
LED
labeling
Meaning
Description and corrective measures
READ
Red, flashing (frequency 0.5 s):
The exposure time setting was unsuccess-
ful.
The exposure time setting was unsuccessful. The error is
displayed for 5 s, the "READ" function is then terminated.
Possible causes: The lighting conditions are not sufficient
for an automatic adjustment.
•
Too little light available, for example, because no light
source is installed or the light source is not sufficiently
bright.
•
There is too much ambient light, so the exposure time
cannot be set low enough.
•
The illuminated object has a strongly reflective surface.
Solutions: Start the WBM to check the displayed image.
•
Make sure you have the right lighting.
•
Use built-in ring light with polarization filter to reduce
reflections.
Red, flashing (frequency 0.25 s):
The focus setting was unsuccessful.
The focus setting was unsuccessful. The error is displayed
for 5 s, the "READ" function is then terminated.
Solution: Make sure that there is an object with sufficient
contrast in the field of view of the reader, that the object is
sufficiently far away from the reader (at least 30 - 60 cm
depending on the lens) and that the subject is sufficiently
illuminated
