CHAPTER 3 INTERFACE
B-EP Series
3-19
• When several packets are sent (for storing a form or graphics, or printing data).
Printer
A link request is detected.
A link is established.
Within 40 msec.
Host
PAD
NAK
ACK for the command process end is
transmitted.
Command packet
Start of command process
End of data
CK
EOT
CK
Command packet
CK
Command packet
CK
A link request is transmitted
every 50 msec. if the printer
sends no NAK.
Within 1 sec.
Within 1 sec.
Within 1 sec.
Within 1 sec.
Normal reception (CRC OK)
Within 200 msec.
Normal reception (CRC OK)
Within 200 msec.
Normal reception (CRC OK)
Within 200 msec.
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