Brother TD-2120N - Manual (Page 42)

Raster Command Reference
- 38 -
5. Flow Charts
5.4 Concurrent printing cooling flow for USB connection
Computer (host) Printer
If there are no
problems with the
printer status
(media, etc.), the
data is transmitted.
If there is a
problem, an error
appears.
The status of the printer
(media, etc.) is checked
and a response is sent.
Data received.
Beginning printing
without waiting for a
print command
Printing
Displaying sending
The printer is initialized.
Status
(Notification:
“Cooling (started)”)
Returned “NAK” from
cooling
Repeating reading of
maximum and
transmission timeout
times. If the
transmission timeout is
exceeded, reading,
and displaying the
cooling status if a high-
temperature error is
returned.
Failed
Status (Notification: “Cooling (finished)”)
Resuming printing
Continuing reading.
0 packets are returned
while cooling.
However,
notifications are made
while cooling only if a
fan motor error occurs.
0 packet
When cooling is finished,
Notification:
“Cooling
(finished) ” is returned.
READ
READ
Any jobs with errors
remaining in the printer
are cleared.
Status information request
Status (response to status information request)
Sending control codes
Sending raster data
Initialize
Status
(Phase change:
“Printing”)
Sending raster data
Sending raster data
Sending raster data
0 packet
0 packet
0 packet
Sending raster data
Sending raster data
Sending raster data
Cooling occured
Invalidate