Datalogic PowerScan M8500, Product Reference Manual

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Introduction
22 PowerScan® M8500
Concatenation
It is possible to concatenate up to 4 different codes, set their length and enable the Intercode
Delay between them (the intercode delay is set in the specific interface parameters, see
"Configuration Using Code Symbols" starting on page 53
). When enabling the delay one or
more global headers and terminators are added to the decoded data. The concatenation
procedure may occur in different ways depending on the number of codes to be decoded per
image:
One Code Per Scan
• If the code resulting from the single decoding of an image belongs to one of the code
families to be concatenated, it is saved to the PowerScan® M8500 memory waiting
for other codes to complete the concatenation.
• If the code belongs to the same family of a code previously saved, it overwrites the old
one.
• If the code resulting from the decoding does not belong to one of the code families to
be concatenated, it causes the concatenation failure and clears the temporary memory.
If the "Concatenation Failure Transmission" command is set to "Tx codes causing fail-
ure" (see
page 100
), this code will be sent in the output message.
All Codes Per Scan
• All codes resulting from the decoding of an image and belonging to one of the families
to be concatenated are saved to the PowerScan® M8500 memory waiting for other
codes to complete the concatenation.
• If one or more codes resulting from the decoding belong to the same family of codes
previously saved, they overwrite the old ones.
• When the image contains no code to be concatenated, the concatenation fails and the
reader temporary memory is cleared. If the "Concatenation Failure Transmission"
command is set to "Tx codes causing failure" (see
page 100 ), the codes causing the
concatenation failure will be sent in the output message.