Casio CDP-220R - Manual (Page 33)

Data Receiver Data Sender Operation
(External Device) (This Instrument)
HBR -----> Send Request
(Optional)
ACK -----> Acknowledge
<----- HBS Data Send
ACK -----> Acknowledge
<----- HBS Data Send
:
:
(Terminate operation)
<----- RJC Data Send
Canceled
BSY is returned to the external device when OBS, OBR, HBS, or HBR is sent while the Instrument
mode is not suitable to perform bulk dump, etc. After BSY is received, the external device should wait
until the instrument enters a mode in which the session is enabled.
Data Receiver Data Sender Operation
(External Device) (This Instrument)
OBR -----> Send Request
<----- BSY Send Rejected
Data Receiver Data Sender Operation
(External Device) (This Instrument)
<----- OBS Data Send
BSY -----> Receive Rejected
Data Receiver Data Sender Operation
(External Device) (This Instrument)
HBR -----> Send Request
<----- BSY Send Rejected
Data Receiver Data Sender Operation
(External Device) (This Instrument)
<----- HBS Data Send
BSY -----> Receive Rejected
33