10 - 24 DS6707 Digital Imager Scanner Product Reference Guide

Code 39 Buffering (Scan & Store)

Parameter # 71h

This feature allows the digital imager scanner to accumulate data from multiple Code 39 symbols.
Selecting the Scan and Store option (Buffer Code 39) temporarily buffers all Code 39 symbols having a leading
space as a first character for later transmission. The leading space is not buffered.
Decode of a valid Code 39 symbol with no leading space causes transmission in sequence of all buffered data
in a first-in first-out format, plus transmission of the “triggering” symbol. See the following pages for further
details.
When the Do Not Buffer Code 39 option is selected, all decoded Code 39 symbols are transmitted
immediately without being stored in the buffer.
This feature affects Code 39 only. If selecting Buffer Code 39, we recommend configuring the digital imager
scanner to decode Code 39 symbology only.
While there is data in the transmission buffer, selecting Do Not Buffer Code 39 is not allowed. The buffer
holds 200 bytes of information.
To disable Code 39 buffering when there is data in the transmission buffer, first force the buffer transmission
(see Transmit Buffer on page 10-25) or clear the buffer.
Buffer Data
To buffer data, Code 39 buffering must be enabled and a Code 39 symbol must be read with a space
immediately following the start pattern.
•
Unless the data overflows the transmission buffer, the digital imager scanner issues a lo/hi beep to
indicate successful decode and buffering. (For overflow conditions, see Overfilling Transmission Buffer.)
•
The digital imager scanner adds the decoded data excluding the leading space to the transmission
buffer.
•
No transmission occurs.
Buffer Code 39 (Enable)
(01h)
*Do Not Buffer Code 39 (Disable)
(00h)