Computer (host) ; Printer ; Reprinting 1st page - Page 40

Raster Command Reference 

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5. Flow Charts 

5.2 Error flow for USB connection (when feeding at the end of the page) 

Computer (host) 

Status information request 

Status (response to status information request) 

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 printing  

Displaying sending 

Sending control codes 

Sending raster data 

Initialize 

The printer is 
initialized. 

Status 

(Phase change:  

“Printing”) 

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

 “Printing completed” 
received. 

Sending raster data 

Status (Phase change: “Waiting to receive”) 

Sending control code/raster data 

Status 

(

“Error occurred”) 

Sending raster data 

Sending raster data 

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

 “Error Occured” received. 
 

Initialize 

If there are no 
problems with the 
printer status (media, 
etc.), the data is 
transmitted. If there is 
a problem, an error 
appears. 

Printing of the 1st 
page is actually not 
finished, but the 
“Printing completed” 

status and “Waiting 

to receive” phase are 
sent. 

An error appears. 
When restarted, data is 
resent starting with the 
1st page since 

“Printing” 

for the 2nd page is not 
received. 
 

If an error occurs, all 
data read from the 
computer is cleared. 

Reprinting 1st page 

READ 

READ

READ 

Printer 

 Phase change 

“Printing” received. 

Status (“Printing completed”) 

Finishing process 
for printing page 1 

Sending data for page 2 

Error occurred 

Resending process 
for data of 1st page 

Displaying printing  

Displaying printing