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Pin 11/20 becomes "Ready" when the printer finishes transferring all the data
from the input buffer. If a <DC3> is sent, the printer transmits a <DC1> (XON)
and the host resumes transmission. When you switch the printer to Offline, pin
11/20 becomes "Busy" and a <DC3> is transmitted. When you switch the
printer to Online and the input buffer is empty, pin 11/20 becomes "Ready" and
a <DC1> is transmitted. The following table describes the states of printer
XON/XOFF operation:
Note: If the printer is already in an XOFF condition, switching to Offline or Online has
no effect.
# of Bytes Received
Do not care
768
768 + each 15 thereafter
Buffer empty
Ready/Busy Protocol
Ready/Busy protocol uses hardware flow control on pin 11 or pin 20 to indicate
the printer mechanical status and the printer input buffer input buffer status. To
control data flow, pin 20 is the industry standard, however pin 11 is included in
Intermec products for backward compatibility. The printer reports "Busy" on
pin 11 and pin 20 when you switch to Offline, and "Ready" when you switch
Online assuming the buffer is not full. Pressing the [PAUSE] button on the 4100
printer toggles the printer Online (LED off) and Offline (LED on).
Enable this option by setting the communication protocol to Ready/Busy.
Hardware flow control does not work with multi-drop or modem connections.
User-Defined Protocol
The 4100 printer allows you to change protocol characters. However, unlike the
Intermec 86XX series printer, the 4100 does not allow you to define your own
protocol. Instead, you may substitute new characters to be used as protocol
characters, but the rules for the protocol chosen do not change. There is one
table of user-definable protocol characters that, when changed, is used by all
protocols. Refer to the following table for the user-definable characters and the
protocols they affect.
Note: Any status response character that is replaced by the NUL character will not be
sent back to the host.
1 8
p t
Online/Offline
Offline
Offline
Online
Online
Installing the Printer
Pin 11/20
Transmit
Busy
<DC3>
Busy
Busy
<DC3>
Ready
<DC1> (if DC3 was
sent)
2
2-13
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