Casio PX-700 - Manual (Page 38)

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When the BSY is received, the receiver must wait until the PX-310 enters a session-enabled mode, or use a
Prepare for Data Management parameter (see "18.2 Data Management Command List") to change to a
communication-enabled mode.
See "Part VI Parameter Set List" for information about how parameter sets can actually be transferred.
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)
Data Receiver Data Sender Operation
BDS → Data Send
← BSY Busy
(Send Canceled)
Data Receiver Data Sender Operation
HDR → Send Request
← BSY Busy
(Send Canceled)
Data Receiver Data Sender Operation
HDS → Data Send
← BSY Busy
(Send Canceled)