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The session can be canceled for any reason by sending an HDJ. The HDJ can be sent by the sending device or
the receiving device. The bulk dump session is terminated immediately upon receipt of an HDJ.
In the case of the WK-3700, for example, when a communication request is received from an external source
while floppy disk control is being performed, BSY is returned to an external device that sends BDS, BDR, HDS,
HDR.
When the BSY is received, the receiver must wait until this Model enters a session-enabled mode, or use a
Prepare for Data Management parameter (see "20.2 Data Management Command List") to change to a
communication-enabled mode.
Data Receiver Data Sender Operation
HDR → Send Request (Optional)
← HDS Data Send
HDA → Acknowledge
← HDS Data Send
HDJ → Rejection
(Send Canceled)
Data Receiver Data Sender Operation
HDR → Send Request (Optional)
← HDS Data Send
HDA → Acknowledge
← HDS Data Send
:
:
HDJ → Data Receive Rejected
(Send Canceled)
Data Receiver Data Sender Operation
HDR → Send Request (Optional)
HDA → Acknowledge
← HDS Data Send
HDA → Acknowledge
← HDS Data Send
:
:
← HDJ Data Send Rejected
(Send Canceled)
Data Receiver Data Sender Operation
BDR → Send Request
← BSY Busy
(Send Canceled)