Network Automation Protocol - EEG HD490 Manual

HD490 AFD Software
A Appendix A
A.1 Network Automation Protocol
HD490 software modules can be remotely controlled over a network by
connecting to TCP port 2300 on the encoder. The messages sent to this
port from any automation server must follow the format given in this
appendix.
TCP messages sent to the port to control the AFD module should have
the following payload format:
• 4 byte integer length (including entire payload)
• 4 byte integer command code of 0x00000001 for AFD module con-
trol
• 4 byte integer status code (set to 0x00000000)
• A variable length data string in the format name = value
To control AFD codes, the data string should read "AFD=value", where
value is the desired code as a 4 character string, for example:
AFD=1001
This AFD code will then be inserted on every frame until further notice is
received from the automation system, in the form of another AFD code,
or a command to return to local control.
To cancel the previous automation message and return the AFD code to
local control (preset or upstream sources), send a control packet with a
"stop" value instead of a valid data string, for example:
AFD=stop
You can also force a return to local control manually by disabling Net-
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