Casio PX-5S Manual page 45

Note: Number of retries that exceeds the retries stipulated by Handshake Max Retry explained under "21.3 Data Management
Parameter".
19.3.12 Example: Session Termination by Error Generation
Data Receiver
SBS(HBR)
HBR
ACK
ERR(CRC Error)
ERR(Format Error)
ERR(Time Out Error)
ERR(CRC Error)
RJC
Note: Number of retries that exceeds the retries stipulated by Handshake Max Retry explained under "21.3 Data Management
Parameter". Also, the maximum number of retries is the same, even if multiple instances of the same error are generated or if
multiple different errors are generated.
19.3.13 Example: Intentional Session Termination by an External Device
Data Receiver
(External Device)
SBS(HBR)
HBR
ACK
ACK
RJC
Data Sender
----->
<----- ACK
----->
<----- HBS
----->
<-???- HBS
<-???- HBS
----->
<-???- HBS
----->
<-???- HBS
----->
:
<-???- HBS
----->
<-???- HBS
----->
Data Sender
(This Instrument)
----->
<----- ACK
----->
<----- HBS
----->
<----- HBS
----->
<----- HBS
----->
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Operation
Session Start Request
Acknowledge
Send Request
(Optional)
Send Packet
Acknowledge
Send Packet
Send Packet
Error
Resend Packet
2 consecutive errors
Resend Packet
3 consecutive errors
Resend Packet
N consecutive
errors(*Note)
Resend Packet
Abandon Session
Operation
Session Start Request
Acknowledge
Send Request
Send Packet
Acknowledge
Send Packet
Acknowledge
Send Packet
Terminate Session