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VISCA Command/ACK Protocol
* When the camera address selector is set to an address other than 0, the value x in 88 30 0x FF will be variable.
Do not transmit the command (except Address Set,
IF_Clear, Command Cancel, CAM_Power) when any
menu is displayed on the screen. If displayed, clear the
menu first using CAM_Menu Command, and then
proceed.
Command Command Message Reply Message Comments
General Command 81 01 04 38 02 FF
(Example)
90 41 FF (ACK)+90 51 FF
(Completion)
90 42 FF 90 52 FF
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 Error)
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 commands
currently being executed.
81 01 04 08 02 FF
(Example)
90 61 41 FF
(Command Not Executable)
90 62 41 FF
Could not execute the command in the current mode.
Inquiry Command 81 09 04 38 FF
(Example)
90 50 02 FF (Completion) Does not return ACK.
81 09 05 38 FF
(Example)
90 60 02 FF
(Syntax Error)
Accepted an incompatible command.
Address Set 88 30 01 FF 88 30 02 FF The device address number plus 1 is returned.*
IF_Clear
(Broadcast)
88 01 00 01 FF 88 01 00 01 FF The same command is returned.
IF_Clear (For x) 8x 01 00 01 FF z0 50 FF (Completion) ACK is not returned for this command.
Command Cancel 8x 2y FF z0 6y 04 FF
(Command Canceled)
Returned when the command of the socket specified is
canceled. Completion for the command canceled is not
returned.
z0 6y 05 FF
(No Socket)
Returned when the command of the specified socket has
already been completed or when the socket number specified
is wrong.