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
P
D
NAK
CRCCRCCommand & Data80HY
Length ID ID STX
Start of command process
End of command process
ACK for the command process
end is transmitted.
CK
CRCCRCCommand & Data81HYLength ID ID STX
CK
CRCCRCCommand & Data02HYLength ID ID STX
CK
EOT
CK
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.
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