SDT 5000 User Manual
Document MBUD-0109v11
3.1.2 AT MODE
To select AT mode use the command:
>apmode at
OK
AT mode has several configuration parameters that must be set via the command line to allow the
data to be sent to the host from the RTU.
To configure the RTU port connection for AT mode:
•
On the test port the parameters, baud rate, data bits, parity, and stop bits must be set to
match the RTU (or terminal). The default values are: 9600 baud, 8 bits, no parity, 1 stop
bit.
>atcfg baud 9600
OK
>atcfg data 8
OK
>atcfg parity none
OK
>atcfg stop 1
OK
•
DTR must be asserted to communicate with the RTU port.
•
The SDT 5000 is now ready to communicate with the host. The RTU can establish a
connection to the host using the standard AT command sequence:
at
OK
atd316520020034
CONNECT 9600
•
After a connection has been established, the RTU may send data to the host. After several
seconds, the data will arrive at the host. The delay is due to the propagation delay through
the satellite.
To troubleshoot the RTU port for AT mode:
1.
Use a terminal connected to the RTU port on the SDT 5000. Set the communication
parameters to the values specified in the steps above. Enter “at<CR>”. The SDT 5000
should respond with the standard AT response of “OK”.
at
OK
2.
If the unit does not respond with “OK”. Verify the RTU Port application mode of the
SDT 5000 with the ‘apmode’ command.
3.
If the unit still does not respond check the RTU port connections.
Version 1.1, 03/24/06
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