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Serial Programming Specifications
Serial Command Structure
“Start Character”<Command 1>…<Command n>“End Character”
The command structure consists of:
-
Start character
-
Command/s
-
End character
Start Character
Every serial programming starts with an SOH character (ASCII value 01). The SOH
character is needed only once for each set of commands, for example if you need to
send two consecutive commands, it would require one SOH character followed by the
two commands and the End character.
Commands
Each command data is bounded in <> characters. For example, the factory default
command is
<FACDEF=1>
End Character
At the end of each set of command\s, the end character EOT (ASCII value 04) is
required.
Scanner Responds
After each successful command\s, the scanner will respond with an ACK character. If the
command is incomplete or out of rang, then the scanner responds with a NAK character.
Example:
This is a command for setting the Factory defaults :
“SOH”<FACDEF=1>”EOT”
In Visual Basic:
Dim Command As String
Command = Chr$(1) & "<FACDEF=1>" & Chr$(4)
And the scanner response is:
ACK
Changes will be effective after scanner ACK response.
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