Chapter 10 Troubleshooting
CPT7 and CPT7700 Installation and Operation User Manual v9
139
4. Use the suggestions in
Mitigating High Receiver Temperature
on page 137 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).
10.4 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:
l
Corrupted or bad data within the receiver Non-Volatile Memory (NVM).
l
An unsupported Auth Code.
l
The expected main firmware image could not be found by the boot code. This is possibly due 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
Safe Mode is indicated by an error bit in the
RXSTATUS
log.
10.4.1 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.
10.4.2 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:
1. Request the
SAFEMODESTATUS
log and determine the current
Safe Mode State
of the system.
2. Reference Table: Safe Mode States in the
OEM7 Commands and Logs Reference Manual
and find the
suggested actions for the current Safe Mode State.
3. If the suggested actions do not resolve the issue, contact NovAtel Customer Support.
Содержание CPT7
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