User Manual
Chapter 5
GFK-2849A
Oct 2019
Diagnostics
104
Restart Triggered by Reset Signal from the RX3i CPU
The RX3i CPU resets/restarts the ECM850 if:
•
The application logic executes SVC_REQ #24, specifying the rack and slot of an
ECM850.
•
The RX3i CPU loses communications with the ECM850.
•
The ECM850 requests the RX3i CPU to reset / restart it (for example, as a result of a
restart or default Command Line Interface command execution).
Restart Triggered by Restart Pushbutton
Pressing and releasing the ECM8
50’s Restart pushbutton resets the hardware, turns OFF all
LEDs briefly and initiates the module’s power
-up sequence. The Restart pushbutton may
also be used to restart the module if the STATUS LED is blinking an error code upon hardware
or runtime failure or if the module locks up.
Restart Triggered by Restart and Default Command
Issuing a restart or default command from the Command Line Interface causes the ECM850
to restart. Modify-level privileges are required to issue these commands.
Restart Triggered by Hardware Watchdog Timer
The ECM850 maintains a hardware watchdog timer that will restart the module in the event
that it is unable to carry out its normal processing. The RX3i CPU is not able to access the
ECM850’s shared memory while the ECM850 is res
tarting.
After the restart, the module’s Local Log table is restored from NVRAM. The ECM850 logs a
Watchdog Timer Expired fault in the RX3i CPU’s IO Fault Table,
and a Restart Event in its local
log table.