Telycam TLC-300-IP-12-4K, Руководство пользователя, Страница: 35 / 36

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Payload
According to Payload type, the following data will be saved.

VISCA command
Save VISCA command packet

VISCA inquiry
Save VISCA message packet

VISCA reply
Save VISCA return packet

VISCA device setting command
Save VISCA equipment setting command packet.

Control command
The following data is saved in control command payload

Controlled reply
The following data is saved in return command
payload of control command.
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.