Image processing
4.4 Options for image acquisition and image processing
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
93
Evaluation attempts
In "Program sequence" mode, processing is attempted with up to five saved codes for each
trigger. With the default setting, a separate image is acquired and evaluated with the settings
saved for the particular code for every code in the program sequence. Following the first
successful evaluation, processing of the trigger is stopped and the result is output.
"Best read result" and "All read results" settings
In program sequence mode, as with the image acquisition option "Scan", you can use the
"Best read result" and "All read results" settings.
● If you select "Best read result", evaluations are attempted with all activated codes. All
successful evaluations are compare based on a selectable quality criterion. The
qualitatively best result is output.
● If you select "All read results", an evaluation is also attempted with all activated codes. All
successful evaluations are compared output.
Same image settings for all codes to be evaluated
If you want the same image settings to be used for all codes to be evaluated, you can also
activate the "Use 1st image" option. In this case, only one image acquisition is made for
each trigger. The settings of the code in the program sequence which has the lowest number
are used. The image acquired is then used for processing all codes in the program
sequence.
4.4.5 Match options for Track&Trace tasks
4.4.5.1 Trigger-synchronized matching (XMATCH command)
Note
Availability of XMATCH
The XMATCH function is not available for SIMATIC MV420 SR-B.
The XMATCH function is extremely versatile and optimized specifically for Track&Trace
applications.
XMATCH is available via the interfaces TCP, RS-232 and ASM. The section "Process
interfaci
ng via an automation system (PLC, PC)" (Page 233) explains the XMATCH
comm
and.
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