Examples Of Data Link Protocol; Normal Transmission And Receipt; Contention - Nikon NWL860 Series Manual

Chapter 3 Interface Specification

6. Examples of Data Link Protocol

6-1.

Normal Transmission and Receipt

Request
2
to send
3
* For details on T1–T3, see "3-3. (Block Transfer) Protocol Parameter" in this chapter.
6-2.

Contention

18
ENQ
T2
EOT
Message length
DATA
DATA
·
·
Checksum
Checksum
T2
ACK
T3
ENQ
EOT
T2
Message length
T1
DATA
Equipment Host
ENQ
EOT
Message
ACK
ENQ
EOT
Message
ACK
ENQ
·
·
Ready to receive
T2
T1
Acknowledge
Send a reply.
T2
Ready to receive
Acknowledge
Send a reply
(if required).
Resend contention.