Chapter 3 SPAN Operation
OEM7 SPAN Installation and Operation User Manual v14
119
Firmware 7.06.xx and earlier
Type
Firmware 7.07.00 and later
Type
WHEELVELOCITY
1
Command
RAWDMI
Log/Command
TIMEDWHEELDATA
Log
RAWDMI
Log/Command
WHEELSIZE
Log
DMISTATUS
Log
INSWHEELUPDATE
Command
None
SETWHEELPARAMETERS
Command
DMICONFIG
Command
ENCLOSUREWHEELSENSOR
Command
DMICONFIG
Command
Table 28: DMI Command and Log Capatibility
For firmware versions 7.06.xx and earlier, refer to
s.novatel.com/OEM7/Content/Appendix/PreviousVersionsDocument.htm
for information about the legacy com-
mands and logs.
3.7.9 DMI Troubleshooting
Confirming that a DMI is setup and communicating properly within the entire system is important. Once all the
hardware is setup, and the necessary commands have been issued, use the following checklist to ensure that
the DMI information is being created and used:
l
RAWDMI
logs are being published by the receiver.
l
RAWDMI
logs have valid data (when in motion the value in the RAWDMI log will increase).
l
DMISTATUS in the
INSUPDATESTATUS
log reports a status greater than or equal to ACTIVE.
If there are no valid
RAWDMI
logs being published from the receiver then debugging the hardware connections
and setup commands may be required. Check the following:
l
All communication lines are connected to the DMI.
l
The DMI is being powered.
l
The receiver is being powered.
l
The DMI has been enabled through a
DMICONFIG
command.
l
The receiver has the latest NovAtel Firmware, available from the NovAtel website (
).
l
The receiver has a valid SPAN model for use with DMI.
Further electrical troubleshooting may be required to verify signal integrity. In many cases, note the following.
l
Cable shields should be tied to the connector shells and the metallized backshells/housings should be in con-
tact with the connector shells as well.
l
A +/- and B +/- differential pairs should be on twisted pairs in the cables.
3.8 Azimuth Sources on a SPAN System
The SPAN system use three different methods to calculate the azimuth.
1
The WHEELVELOCITY command will still be accepted in 7.07.00 with a limited capability. WHEELVELOCITY’s cumulative
tick field will be mapped to a RAWDMI command for backwards compatibility.
