VDO360 Saber20, Руководство пользователя

Страница: 40 / 42

39
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 resent in application.
Generally, when controller sends a command to peripheral equipment, controller will wait for the return message then send
the next command, we can 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.
Sequence chart as following
Note: Do not set IP address, subnet mask, gateway parameter in VISCA over IP command, otherwise, it will cause network breaks
off. Due to change these parameter, network will be in off status.
Sequence chart when command lost
Sequence chart when returned message lost