32
WWW.EVERETIMAGING.COM
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
received the commands from return message’s lag time. If controller shows it is overtime, it will be
marked as error transmission.
If controller shows it is overtime, resend the
commands to check peripheral’s status. The resent
command sequence number is same as last command, the following chart will list the received
message and status after resending the commands.
