Data Sender Data Receiver Operation
(External Device) (This Instrument)
SBS(HBS) -----> Session Start Request
<----- ACK Acknowledge
HBS -----> Send Packet
<----- ACK Acknowledge
HBS -----> Send Packet
<----- ACK Acknowledge
HBS -----> Send Packet
<----- RJC Terminate Session
18.3.15 Example: Session Pause
Session flow when the session is temporarily paused for some reason and then restarted is shown below.
A session can be paused by sending an EXI message from an external device or this Instrument to the
other device.
Data Receiver Data Sender Operation
(External Device) (This Instrument)
SBS(HBR) -----> Session Start
Request
<----- ACK Acknowledge
HBR -----> Send Request
<----- HBS Send Packet
ACK -----> Acknowledge
<----- HBS Send Packet
Interval *Note1
EXI -----> Extend Interval
(Pause Session)
Interval *Note1
EXI -----> Extend Interval
:
EXI -----> Extend Interval
Interval *Note1
ACK -----> Acknowledge
(Restart
Session)*Note2
<----- HBS Send Packet
ESS -----> End of Data
:
Other Sub Session
:
EBS -----> End of Session
Note1 : Interval less than the time stipulated by Handshake Max Interval explained under “20.2 System Exclusive Protocol
Parameter”. There is no limit on the number of extensions using EXI.
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