Applied Concepts Inc ACMI007 User Manual
Applied Concepts 011-0131-00 rev 2
Page 46
Several message formats are available and can be selected. Refer to Appendix A and
Appendix B for the content and organization of the fields for the different formats. They
vary from simple ASCII character strings to longer formats reporting multiple speeds and
status information. There are streaming formats and polling formats.
The RS-232 models can stream data in any format except EE which is reserved as a
polling-only format. Whenever the radar transmitter is on, the Speed Sensor streams
out speed messages in the selected message format at a fixed number of messages
each second.
The RS-232 models can also communicate using the Format EE handshaking (or
polling) method. Instead of automatically streaming data out, it sends a single Format
EE speed message packet only when the controller asks for one. The Stationary Speed
Sensor reports the strong target speed value, and the Speedometer and Traffic Speed
Sensors report the vehicle speed value.
To enable Format EE polling, make sure the radar transmitter is on and that the
Message Format is configured for EE. Then select “Start EE Polling” from the Options
pull-down menu on the main screen as shown below. The Dashboard application will
then begin sending EE Format Requests and displaying the values returned from the
Speed Sensor. To stop the polling from the application, select “Stop Polling” from the
same menu.
Appendix B for the content and organization of the fields for the different formats. They
vary from simple ASCII character strings to longer formats reporting multiple speeds and
status information. There are streaming formats and polling formats.
The RS-232 models can stream data in any format except EE which is reserved as a
polling-only format. Whenever the radar transmitter is on, the Speed Sensor streams
out speed messages in the selected message format at a fixed number of messages
each second.
The RS-232 models can also communicate using the Format EE handshaking (or
polling) method. Instead of automatically streaming data out, it sends a single Format
EE speed message packet only when the controller asks for one. The Stationary Speed
Sensor reports the strong target speed value, and the Speedometer and Traffic Speed
Sensors report the vehicle speed value.
To enable Format EE polling, make sure the radar transmitter is on and that the
Message Format is configured for EE. Then select “Start EE Polling” from the Options
pull-down menu on the main screen as shown below. The Dashboard application will
then begin sending EE Format Requests and displaying the values returned from the
Speed Sensor. To stop the polling from the application, select “Stop Polling” from the
same menu.
The RS-485 models can only use handshaking methods since they are always a slave
on the link. They never send data unless the controller asks for it. They can
communicate using Format EE polling as described above, but only if the unit’s address
is 2, the factory default. Refer to Section Error! Reference source not found. for more
detail describing how to check or set the Speed Sensor address.
The Stationary RS-485 model can also use the more flexible EA polling. With this
method, the controller sends an EA request as described in Appendix B, and the Speed