Siemens SIMATIC MV500 - 3.4 Options for image acquisition and image processing

Image processing
3.4 Options for image acquisition and image processing
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
83
Quality characteristic
Value output
Rotation tolerance (LRT)
The output value describes the adherence to the limit value set for
rotation deviation.
• A value of 100 means that the rotation of the found object in-
stance corresponds exactly to the stored rotation.
• A value of 0 means that the angle deviation was well off target
(but not exceeded).
Note
This value is calculated only if "Max. angle deviation" is activated in
the "MATCH" tab of the relevant locator step. Otherwise, the value
100 is output.
Position tolerance (LPT)
The output value describes the adherence to the limit value set for
position deviation.
• A value of 100 means that the position of the found object in-
stance corresponds exactly to the stored position.
• A value of 0 means that the position deviation in the x or y direc-
tion was well off target (but not exceeded).
Note
This value is calculated only if "Max. position deviation" is activated in
the "MATCH" group of the relevant locator step. Otherwise, the value
100 is output.
Table 3- 19 Assignment of the numeric evaluation of locator to the quality levels
Grade
4
3
2
1
0
Conformity (LFI)
≥ 84
≥ 63
≥ 42
≥ 21
< 21
Match (LMA)
≥ 84
≥ 63
≥ 42
≥ 21
< 21
Clear percentage (LCL)
≥ 84
≥ 63
≥ 42
≥ 21
< 21
Rotation tolerance (LRT)
≥ 84
≥ 63
≥ 42
≥ 21
< 21
Position tolerance (LPT)
≥ 84
≥ 63
≥ 42
≥ 21
< 21
3.4 Options for image acquisition and image processing
Image acquisition options
The image acquisition options of the optical reader were developed for a wide range of
applications.
There are three different ways of controlling image acquisition and processing:
• Individual trigger
• Auto-trigger
• Scan