Process interfacing via an automation system (PLC, PC)
10.7 Scanner portal application
SIMATIC MV420 / SIMATIC MV440
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Operating Instructions, 04/2013, A5E02371045-06
10.7
Scanner portal application
Introduction
The section "Scanner Portal application" explains how you can implement a scanner portal
application with several readers.
In a scanner portal application, there is a large field of view that is covered by several
individual readers. Here, the areas of the field of view of the readers overlap. To prevent the
same code being output more than once, the individual readers (slaves) send their read
result to a master reader. The master reader synchronizes the individual results and
prevents the output of multiple read results. The master reader itself is also a slave that
searches for 1D/2D codes in the field of view.
Restrictions of the scanner portal application
The scanner portal application is subject to the following restrictions:
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All readers must operate in the untriggered image acquisition mode "Autotrigger".
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If several different 1D/2D codes with identical contents are read one after the other, the
content is output only once.
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The master reader can only output the synchronized result via the TCP interface.
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The formatting options of the result string of the master camera are restricted.
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A maximum of five readers (4 slaves, and 1 master) are supported.
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If a slave reader is in an error state, the master reader does not change to an error state.
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The master reader does not monitor the number of connected slave readers.
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Maximum results of 2048 characters including a formatting instruction required for
synchronization can be synchronized.
Summary of Contents for SIMATIC MV420
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