Casio CTK-691 - Adjusting Accompaniment Volume

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Data send is canceled when no acknowledgement (ACK) is received.
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.
Data Receiver Data Sender Operation
HDR → Send Request (Optional)
← HDS Data Send
HDA → Acknowledge
← HDS Data Send
HDE → Error
← HDS Data Resend
:
:
HDE → Error
← EOD Data End
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)