Toshiba B-EP Series - Page 45

CHAPTER 3 INTERFACE
B-EP Series
3-14
• ID set command (erroneous transmission)
*1: Explanation of a command packet (when the length is designated in 1 byte.)
To send [ESC] ID; [03H] [51H] [LF] [NUL].
[02H]
[00H][00H] [08H] [1BH]ID;[03H][51H][0AH][00H] [F7H][8AH]
CRC
Command
Length
Printer ID
STX
Printer
A link request is detected.
A link is established.
Within 40 msec.
Host
PAD
NAK
Normal reception (CRC OK)
ACK for the command process end is
transmitted.
Command packet (*1)
Start of data process
End of data storage
A
CK
EOT
A
CK
A link request is transmitted
every 50 msec. if the printer
sends no NAK.
Within 1 sec.
Within 1 sec.
Within 200 msec.
Within 40 msec.
NAK
Resend command packet (*1)
Within 1 sec.
Erroneous data reception of CRC (CRC
NG) In case of a CRC error caused by
receiving erroneous data due to noise of
ambient light, etc.