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ONKYO RS232 Control System
2.Communication Flow Description
The TX-DS787/DTR-7.1 uses Question, Command and Notification messages to have communicate with a given HOST. This protocol is designed for point to point communication between a HOST and the TX-DS787/DTR-7.1.
Question Message
Send a "Question Message" to the TX-DS787/DTR-7.1 from the HOST to get the current system status. The TX-DS787/DTR-7.1 will respond with a status message.
TX-DS787 DTR-7.1
Question Message "!1SLIQSTN[CR]" Status Message "!1SLI03[EOF]"
HOST/Controller
Command Message
Send a "Command Message" to the TX-DS787/DTR-7.1 from the HOST to change the system status. The TX-DS787/DTR-7.1 will respond with a status message within 50msec. If TX-DS787/DTR-7.1 does not respond within 50msec, the communication has failed.
TX-DS787 DTR-7.1
Command Message "!1SLI03[CR]" HOST/Controller Status Message "!1SLI03[EOF]"
Notification
If user change the system status, the TX-DS787/DTR-7.1 will notify the HOST by sending the new current status.
