Appendix C— Communications Reference
EasyCoder 4420 and 4440 Bar Code Label Printer User’s Manual
97
When you set the pin to default, it uses flow control if the serial port is set
for XON/XOFF protocol. If you are using Intermec Standard protocol,
the printer uses Ready/Busy.
User-Defined Protocol
The 4420 and 4440 printers provide the capability to change protocol
characters. However, you cannot define your own protocol. You can
substitute characters to use as protocol characters, but the rules for the
chosen protocol do not change. The printer does not use any protocol
characters that you replace with the NUL character. One table of protocol
characters exists. You may redefine these characters to create a table that all
of the protocols can use. One possibility for you to redefine protocol
characters may be the replacement of control characters with printable
characters.
Note:
Please use caution when replacing control characters with printable
characters. One control character can be replaced with only one printable
character.
The next table lists the protocol characters that you can redefine and the
protocols they affect.
Protocols Affected by Redefining Characters
Character
STD
POL Mode D
Multi-Drop
XON/XOFF
SELECT IN
X
X
POLL IN
X
X
RES IN
X
X
REQ IN
X
X
SOM IN
X
X
X
X
EOM IN
X
X
X
X
AFF IN
X
X
NEG IN
X
X
DLE IN
X
X
X
X
XON IN
X
XOFF IN
X
SELECT OUT
X
POLL OUT
X
RES OUT
X
X
REQ OUT
X
X
SOM OUT
X
X
EOM OUT
X
X
AFF OUT
X
X
NEG OUT
X
X
X
DLE OUT
X
X
X
X