Safe Mode; Reset Loop Detection; Recovery Steps - Novatel SMART7 Installation And Operation Manual

Chapter 8 Troubleshooting
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Pay attention to the reading and the boundary limit status.
Refer to Table: HWMONITOR Status Table in the HWMONITOR log section for a description
of the Boundary Limit Status.
4. Use the suggestions in Mitigating High Receiver Temperature on the previous page to reduce
the receiver temperature.
5. Continue monitoring the HWMONITOR log to see if receiver temperature is dropping.
6. Check the RXSTATUS log to see if the temperature status changes to Okay (Bit 1 in the
Receiver Status word changes to 0).

8.4 Safe Mode

Safe Mode is an error condition triggered on the OEM7 receiver if it encounters certain critical
problems during start-up. The receiver does not track GNSS satellites in this state, but the user
interface is still available to allow for diagnosis of the problem.
The receiver will enter Safe Mode under certain rare cases including the following:
Corrupted or bad data within the receiver Non-Volatile Memory (NVM).
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An unsupported Auth Code.
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The expected main firmware image could not be found by the boot code. This is possibly due
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to an error during the main firmware loading process (i.e. WinLoad, SoftLoad, etc.).
Safe Mode exists to allow users to take steps to recover the receiver after such an error occurs.
Potential recovery steps are described in Recovery Steps below.
Safe Mode is indicated by an error bit in the RXSTATUS log.

8.4.1 Reset Loop Detection

In order to determine when the Safe Mode error should be triggered, OEM7 receivers have the
ability to detect when an unexpected reset has occurred during the boot process. If a Reset Loop
is detected, the Reset Loop Detected bit is set in the RXSTATUS log.
This bit is only a warning and the receiver may still be able to operate correctly. The receiver
will allow several unexpected resets to occur before triggering the Safe Mode Error, at which
point the receiver will not track GNSS satellites.

8.4.2 Recovery Steps

If the Safe Mode error bit or the Reset Loop Detected warning bit are set in the RXSTATUS
log, take the following steps to diagnose and recover the system:
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