Brother International QL-1110NWB Raster Command Reference - Page 26

Raster Command Reference 4. Printing Command Details NULL Invalidate ASCII: NULL Hexadecimal: 00 Description  Skipped  If data transmission is to be stopped midway, send the "initialize" command after sending the "invalidate" command for the appropriate number of bytes to return to the receiving state, where the print buffer is cleared. ESC i S Status information request ASCII: ESC i S Hexadecimal: 1B 69 53 Description  When a status information request is sent to the printer, a fixed size of 32 bytes is returned as a response from the printer. For details on these 32 bytes, refer to the following page. Note Before sending print data to the printer, this command should be sent once. Since error information is automatically sent by the printer during printing, do not send this command while printing. For details on transmission of the status, refer to "5. Flow Charts". - 22 - 4. Printing Command Details