CHAPTER 3 INTERFACE
B-EP
Series
3-32
3.2.6
CONNECTION SEQUENCE EXAMPLE (TPCL, RECEIPT OR ESC/POS MODE)
The transmission control is basically the same as in the LABEL mode. Below is an example of
the setting method for the flag of each command packet.
Printer
A link request is detected.
A link is established.
Within 40 msec.
Normal reception (CRC OK)
Host
PAD
NAK
CRC
CRC
Command & Data
80H
Y
Length
ID
ID
STX
Start of command process
End of command process
ACK for the command process
end is transmitted.
ACK
CRC
CRC
Command & Data
81H
Y
Length
ID
ID
STX
ACK
CRC
CRC
Command & Data
02H
Y
Length
ID
ID
STX
ACK
EOT
ACK
A link request is transmitted
every 50 msec. if the printer
sends no NAK.
Command packet
(Within 1 sec.)
Command packet
(Within 1 sec.)
Command packet
(Within 1 sec.)
Within 1 sec.
Within 200 msec.
Normal reception (CRC OK)
Within 200 msec.
Normal reception (CRC OK)
Within 200 msec.
