Hardware Protocol; User-Defined Protocol - Intermec EasyCoder 4420 User Manual

EasyCoder 4420/4440 Bar Code Label Printer User's Manual

Hardware Protocol

The printer uses Ready/Busy and DTR (data terminal ready) of the RS-232C interface
to indicate the printer's status. You can configure Ready/Busy and DTR independent of
each other and independent of the software protocol you select for the serial port. You
can set each pin to one of these three settings: default, high, and Ready/Busy.
When you set the pin to high, the printer will be ready to accept data anytime.
When you set the pin to Ready/Busy, the pin is high when the printer status is ready.
The pin is held low when the printer is in one of these conditions:
•
•
•
•
•
If you set the printer to XON/XOFF protocol, the XON and XOFF characters will not
be transmitted back to the host.
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.
C-6
Offline
Buffer full
No label stock
Ribbon fault
Label at strip pin