8
VISCA Command/ACK Protocol
Command Command Message Reply Message Comments
General
co
mmands
81 01 04 38 02 FF
(Example)
90 4z FF (ACK), 90 5z FF
(Completion)
(z: Socket No.)
Returns ACK when a command has been accepted,
or Completion when a command has been
executed.
81 01 04 38 FF
(Example)
90 60 02 FF (Syntax
Err
or)
Accepted a command which is not supported or a
command lacking parameters.
81 01 04 38 02 FF
(Example)
90 60 03 FF
(Command Buffer Full)
Could not accept the command as there are two
com
mands currently being executed.
81 01 04 08 02 FF
(Example)
90 6z 41 FF
(Command Not
Ex
ecutable)
(z: Socket No.)
Could not execute the command in the current
mod
e.
Inquiry Command 81 09 04 38 FF
(Example)
90 50 02 FF
(Completion)
Does not return ACK for the Inquiry Command.
81 09 05 38 FF
(Example)
90 60 02 FF (Syntax
Err
or)
Accepted an incompatible command.
IF_Clear 81 01 00 01 FF 90 50 FF (Completion) ACK is not returned for this command.
Command Cancel 81 2z FF (z: Socket
No.)
90 6z 04 FF (Command
Canceled)
Returned when the command of the specified
socket is canceled. Completion for the command
canceled is not returned.
90 6z 05 FF (No Socket) Returned when the command of the specified
so
cket has already been completed or when the
specified socket number is wrong.
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