Reserved – NavCom Sapphire Rev.J User Manual
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Sapphire Technical Reference Manual Rev. J
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If the missing heartbeat count is (-2), the receiver experienced a previous ungraceful shutdown,
and the following message is output:
[PANICA]0,0.0,0, PREVIOUSLY UNGRACEFUL SHUTDOWN IS DETECTED: code (11)
If the missing heartbeat count is (-1), a previous ungraceful shutdown cannot be determined,
and the following message is output:
[PANICA]0,0.0,0, UNDETERMINED PREVIOUSLY UNGRACEFUL SHUTDOWN: code (-1)
For example, when a GNSS board with firmware that does not have the capability of detecting
an ungraceful shutdown is first upgraded to firmware with this capability, the GNSS board
cannot retrieve a missing heartbeat count, so it will send an invalid heartbeat missing count (-1)
to the PowerIO board.
If the PowerIO board does not receive a missing heartbeat count from the GNNS board within 1
minute of powering on, a previous ungraceful shutdown cannot be determined, and the following
message is output:
[PANICA]0,0.0,0, UNDETERMINED PREVIOUSLY UNGRACEFUL SHUTDOWN: code (-3)
For example, if the GNSS board firmware does not have the capability of detecting an
ungraceful shutdown, it won’t send this missing heartbeat count to the PowerIO board.
For all other situations in which a previous ungraceful shutdown cannot be determined, the
following message is output:
[PANICA]0,0.0,0, UNDETERMINED PREVIOUSLY UNGRACEFUL SHUTDOWN: code (-2)
This ungraceful shutdown detection mechanism also detects occurrences of GNSS reset. When
more than one missing heartbeat count is received from the GNSS board, the GNSS was reset,
and the following message is output:
[PANICA]0,0.0,0, GNSS RESET IS DETECTED
Examples: [SHUTDOWN] HALT
Request immediate halt
OK [SHUTDOWN]
Response from the receiver
[SHUTDOWN] REBOOT, 10
Request a reboot in 10 seconds
OK [SHUTDOWN]
Response from the receiver
[SHUTDOWN]
Request shutdown status
[SHUTDOWN] REBOOT, 7
Response = current shutdown status
1.182
Reserved