RoadRunners – Communication Protocol
TF -
Protocol of communication
37/46
January 2007
Example 2.2 – Setting a configuration of all symbologies.
Frame to be sent to the decoder:
‘A’ ‘B’ 1
$13
Header Type Size
Command
Reading this frame, the decoder understands:
The user wants to set a configuration (Type "B") for all the symbologies (Header "A"). The
configuration can only contain general options and the Size field must be equal to 1. Then, the
Command field contains the configuration itself:
$013
Bit
Option
1
0 Symbology
Enabled
1
1
Min. length Enabled (set to 6 as default)
0
2 Checksum
calculation
Disabled
0
3
Checksum transmission Disabled
1
4
Max. length Enabled (set to 32 as default)
0
5 -
0
6 -
0
7 -
6.3 Usual command
Example 3.1 – Modifying a configuration of all symbologies.
We now want disable Min length and Enable start/stop characters (for the symbologies having
those), regardless of the other options’ settings.
Frame to be sent to the decoder:
‘A’
‘D’
2
‘C’ , ‘I’
Header Type Size
Command
Reading this frame, the decoder understands:
The user wants to send a command (Type "D") to all the symbologies (Header "A"). Any
command can be sent but not all may be effective on all symbologies.
The command "C" will first be sent to all symbologies, and applied to all of them since they
all have this option available.
Then the command "I" will also be sent to all symbologies but only some of them will apply it
(Code39, Codabar).
