Protocol - Intermec EasyCoder F2 User Manual

Chapter 6 Setting Up the Printer
Setup Parameters, cont.
Serial Communication, cont.
36

Protocol

• XON/XOFF (default)
In the XON/XOFF protocol, data fl ow control is achieved
by using XON (DC1) and XOFF (DC3) characters. Message
blocks are not required to be bracketed by the Start of Text
(STX) and End of Text (ETX) characters. However, at power
up or after a reset all characters except ENQ or VT will
be ignored until an STX is detected. The message length
in this protocol is unrestricted. That is, the printer processes
information as it is being downloaded and stops when there
is no more information.
XON/XOFF protocol conforms to generally accepted indus-
try standards. No end-of-message response is sent to the host
other than XOFF. An XON will be sent on power up.
Since DC1 and DC3 are used for data fl ow control, the
printer status characters are different than those of the Stan-
dard Protocol. If the host ignores the printer's XOFF, the
printer will resend an XOFF after receiving every 15 characters
from the host.
Condition
Buffer already full
Printhead raised
Ribbon fault
No label stock
Buffer now full
Printhead hot
Label at strip pin
Label skipping
Printing
Character
GS
US
US
EM
DC4
SI
FS
DC2
DC2
Intermec EasyCoder F2 – User's Guide