Simple Comparison For Track&Trace (Match Mode/Command) - Siemens SIMATIC MV500 Operating Instructions Manual

Image processing
3.4 Options for image acquisition and image processing
"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.
Differences between "Best read result" and "All read results" settings:
• If you select "Best read result", a processing attempt is always made with all activated
programs. All successful evaluations are compared based on a selectable quality criterion.
The qualitatively best result is output.
• If you select "All read results", a processing attempt is also made with all activated
programs. All successful evaluations are output.
Same image settings for all programs to be evaluated
If you want the same image settings to be used for all programs 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 program in the program sequence that has the lowest number are
used. The image acquired is then used for processing for all programs in the program
sequence.
3.4.5 Simple comparison for Track&Trace (MATCH mode/command)
Note
MATCH command not suitable for changing during production
The MATCH command is not suitable for switching during ongoing production.
The match string can already be pre-defined for non-complex match tasks when saving the
program. For a simple MATCH command, this can be done by a connected controller or a PC.
MATCH is available via the interface for PROFINET (Ident), TCP, RS232 and communication
module. The MATCH command and its structure are described in detail in the section "Process
interfacing via an automation system (PLC, PC) (Page 149)".
Static match default when saving a program
For applications in which the match default is already known during commissioning, the
match can be defined and activated when the program is saved. You can enable match mode
for 1D/2D codes in the "Match" drop-down list from the "Program > Decoder > MATCH" menu
in the WBM.
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Operating Instructions, 03/2021, C79000-G8976-C494-05
SIMATIC MV500