NewTek NDI HX PTZ3, Operating Instructions Manual

Page: 46 / 66

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VISCA device setting command
Save VISCA equipment setting command packet.
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Control command
The following data is saved in control command payload
Name Value Description
RESET 0x01 Resets the sequence number to 0. The value that
was set as the sequence number is ignored
ERROR 0x0Fyy yy=01:Abnormality in the sequence number
yy=02:Abnormality in the message(message type)
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Controlled reply
The following data is saved in return command payload of control command.
Message Value Description
ACK 0x01 Reply for RESET
3.4.3
DELIVERY CONFIRMATION
VISCA over IP uses UDP as transmission communication protocol. UDP communication message
transmission is not stable, it is necessary to confirm delivery and resend in application.
Generally when controller sends a command to peripheral equipment, the controller will wait for the return
message, then send the next command. It can detect and confirm if the peripheral equipment received 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 pe ripheral’s status . Resent command
sequence number is the same as last command, the following chart lists the received message and status after
resending the commands