Phase 2 with a sequence of dle nak and ids – Denso BHT-6000 User Manual

Page 127

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Phase 2 with a sequence of DLE NAK and IDs

If the sending station receives a sequence of DLE NAK and IDs from the receiving
station in response to a transmission block containing text data m, it sends that
transmission block again immediately as shown below.

If the sending station receives a sequence of DLE ACK and IDs before receiving the
sequence of DLE NAK and IDs 10 times in succession, it continues the subsequent
message transmission.

Sending
station

Receiving
station

Data text m

Data text m

Data text m

Data text m+1

If the sending station receives a sequence of DLE NAK and IDs 10 times in succes-
sion or it fails to send a same transmission block, it shifts to phase 3 to terminate
the message transmission abnormally. Even if the phase 3 terminates normally,
the transmission results in an abnormal end.

Sending
station

Receiving
station

Data text m(10)

Data text m(2)

Data text m(1)

DLE NAK and IDs

DLE NAK and IDs

DLE ACK and IDs

DLE NAK and IDs

DLE NAK and IDs

DLE NAK and IDs

Occurrence

of an error

To phase 3.

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