Saber 4K
+
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detect and confirm if the peripheral equipment receive the commands from return
message’s lag time. If controller shows it is overtime, it is regarded as error
transmission.
If controller shows it is overtime, resend the commands to check peripheral’s
status, resent command sequence number is same as last command, the following
chart list the received message and status after resending the commands.
Lost
message
Recelved
message for
retransmission
Status after
retransmission
Correspondence after
retransmission
Command
ACK message
Command is performed
by retransmission.
Continue processing.
Completion
message
For the
command
ERROR(Abnormality
in the sequence
number.)
Command has been
performed.
If only the ACK
message is lost, the
completion message
returns.
If the result by the completion
message is needed, retransmit by
updating the sequence number.
Completion
message for the
command
ERROR(Abnormality
in the sequence
number.)
Command has been
performed.
If the result by the completion
message is needed, retransmit by
updating the sequence number.
Inquiry
Reply message
Inquiry is performed by
retransmission.
Continue processing.
Reply message
for the inquiry
ERROR(Abnormality
in the sequence
number.)
Inquiry has been
performed.
If the result by the reply message
is needed, retransmit by updating
the sequence number.
Error message
Error message
Command is not
performed. If the error
cause eliminates,
normal reply is
return(ACK, reply
message)
Eliminate the error cause. If
normal reply returns, continue
processing.
Inquiry of the
VISCA device
setting
command
Reply message of the
VISCA device setting
command
Inquiry has been
performed by
retransmission.
Continue processing.
Reply message
of the
VISCA device
setting
command
ERROR(Abnormality
in the sequence
number.)
Inquiry has been
performed.
If the result by the reply message
is needed, retransmit by updating
the sequence number.
