VIDEOJET DataFlex 6530 - B.1.2 Working with Communications Sessions

B-2 Videojet DataFlex 6530 Service Manual - Rev AA
carriage return character stops parsing the current data even if the data has partially matched a
command or request. If the Carriage Return-Line Feed sequence (0x0D 0x0A) is accepted as a
terminator, then the line feed character is ignored.
Henceforth in this document, the carriage return character is written as <CR>.
Most commands return either the default success response or the default failure response
depending on whether or not the command was successfully executed.
The default success response is:
ACK<CR>
The default failure response is:
ERR<CR>
The examples given below use the character > to indicate data sent to the printer, and < to
indicate data being received from the printer.
For example:
>>CAF<CR>
<<ERR<CR>
means “the string 'CAF<CR>' was sent to the printer, which responded with the string
'ERR<CR>'”.
As the carriage return character resets the parser, it is recommended to send the carriage return
character before each communications session in order to clear any unwanted data which may
be in the parser's buffer.
This example sends the parser reset character before sending two commands to the printer:
>><CR>
>>JDU|data|<CR>
<<ACK<CR>
>>PRN<CR>
<<ACK<CR>
Table B-1 lists the commands and requests accepted by the Text Communications Protocol.
Command Code Command Name
SEL Job Select (data inserted into consecutive fields)
SLA Job Select (data inserted into named fields)
JDU Job Data Update (data inserted into consecutive fields)
JDA Job Data Update (data inserted into named fields)
PRN Print
SST Set Printer State
GST Get Printer State
CAF Clear All Faults
Table B-1: Text Communications Protocol Commands