Brother TD-2120N - Manual (Page 29)

Raster Command Reference
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4. Printing Command Details
(5) Status type
Status Type Value Description
Reply to status request 00h
Printing completed 01h
Error occurred 02h
Exit IF mode 03h (not used)
Turned off 04h
Notification 05h
Phase change 06h
(Not used) 08h to 20h
(Reserved) 21h to FFh
If an error occurred during printing, the printer returns the error status.
(6) Phase type and phase number
If the phase number is not used, both are fixed at 00h.
Phase State Phase Type
Receiving state 00h
Printing state 01h
Receiving state
Phase Value (Dec.) Higher Order Bytes Lower Order Bytes
Waiting to receive 0 00h 00h
Printing state
Phase Value (Dec.) Higher Order Bytes Lower Order Bytes
Printing 0 00h 00h
 When the printer is turned on, it is in the receiving state. When printing begins, it changes to the “printing”
phase (phase type: printing state; phase number: printing), and the printer sends that phase status to the
computer. When printing has finished, the printer sends the “receiving state” phase status (phase type:
receiving state; phase number: waiting to receive) to the computer. Unless an error occurs during printing,
the printer sends the “printing completed” status.
 With concurrent printing, printing starts even if a print command has not been sent from the computer in
order to print at high speed. At this time, care should be taken since the “printing” and “waiting to receive”
phase statuses will be sent. ( Refer to “ 5. Flow Charts ”.)