6.1. Sequential Normal Flow for USB connection; Computer (host) ; Finishing process for printing - Page 26

6.1. Sequential Normal Flow for USB connection 

Status information request

Status (response status to status information request)

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. 

Receive data. 

Begin printing 
without waiting for a 
print command.

Printing

Printing display 

Sending display

Printing of the 1st 
page is actually not 
finished, but the 
“Printing completed” 
status and “Waiting to 
receive” phase are 
sent. 

Finishing process for printing 

page 1

Send data for page 2

Send control code.

Send print data.

Status 

  (Phase change : 

“Printing state”)

Send a print command (print command with feeding (1A) for 
the last page or print command (0C) for other pages).

Receive “Phase change:Printing state”. 

Receive“Printing completed”. 

Send print data.

Send print data.

Status (“Printing completed”)

Status (Phase change: “Waiting to receive”)

Send control code/print data.

Receive “Phase change: 
Waiting to receive”. 

Perform READ. 

Perform READ.

Send print data.

Send print data.

Status 

  (Phase change : 

“Printing state”)

Send print data.

Print 2nd page.

Print 1st page.

Computer (host) 

Initialize

In order to clear any jobs 
with errors remaining in the 
printer. In case QL-1050, 
please send 350bytes. But 
this is not necessary in 
normal case. 

Printer 

Send 200 bytes of Invalid command 

The printer is initialized.

Brother QL-500/550/560/570/580N/650TD/700/1050/1060N Command Reference 

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