Novatel OEM7 SPAN, Инструкция по установке и эксплуатации

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Chapter 3 SPAN Operation
OEM7 SPAN Installation and Operation User Manual v14 118
LOG INSUPDATESTATUSA ONNEW
4. Check the RAWDMI log to ensure the DMI is producing data.
5. Check the INSUPDATESTATUS log to ensure the DMI is being used in the SPAN solution.
If there is no DMI data being produced or the DMI status is not USED, refer to DMI Troubleshooting on the next
page.
For information about the commands and logs used in this procedure , refer to the OEM7 Commands and Logs
Reference Manual .
Send Current Velocity
To send the current velocity to the OEM7 receiver, the intermediate processor must convert the DMI wheel ticks
into a velocity. The velocity is then sent to the OEM7 receiver using the
RAWDMI command. This command
must be sent once per update period (for example, once per second) and contain the current velocity for that
update period. Sending of the
RAWDMI command should be timed to the 1PPS signal from the receiver.
To configure the SPAN system to accept wheel ticks from an intermediate processor:
1. Send the following command to enable a DMI on the UIC wheel sensor inputs.
DMICONFIG DMI1 ENABLE EXT_VELOCITY
2. Configure the intermediate processor to send a RAWDMI command to the OEM7 receiver once per update
period. This command provides the current velocity for this update period.
Note, the RAWDMI value is a 32-bit signed integer representing the current velocity and should be scaled to
the maximum precision per least significant bit (LSB). For example, if a velocity of 10 m/s is observed, and
the precision of the measurement is to 0.01 m/s, then the measurement should be scaled by 100 (1/0.01)
and the result would be an integer of 1000. The command for this example is:
RAWDMI 1000 0 0 0 1
In the same example, if a velocity of 10.01 m/s is observed, the resulting integer would be 1001.
RAWDMI 1001 0 0 0 1
3. Send the following commands to log the DMI data.
LOG DMICONFIGA ONCHANGED
LOG RAWDMIA ONNEW
LOG INSUPDATESTATUSA ONNEW
4. Check the RAWDMI log to ensure the DMI is producing data.
5. Check the INSUPDATESTATUS log to ensure the DMI is being used in the SPAN solution.
If there is no DMI data being produced or the DMI status is not USED, refer to DMI Troubleshooting on the next
page.
For information about the commands and logs used in this procedure , refer to the OEM7 Commands and Logs
Reference Manual .
3.7.8 DMI Command Compatibility
With the introduction of the new streamlined command and log set for DMI use, legacy commands and logs have
been deprecated.