Woodward MicroNet TMR 5009, Installation/Hardware Manual

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Manual 85580V2 5009 Installation/Hardware
Woodward 73
8. Reset the kernel CPU by toggling its reset switch (press the top half of the
switch in, then press the bottom half of the switch in). At this point the kernel
CPU will perform off-line diagnostic tests for approximately 60 seconds then
re-synchronize with the other control CPUs.
CPU Module
System diagnostic routines continuously monitor each CPU for proper operation.
If a fault condition is detected, the fault is annunciated and the CPU is locked out
of all voting. If necessary, use the CPU module’s front panel LEDs to assist in
diagnosing a related problem. If all CPU LEDs are turned off (not illuminated), it
is probable that input power is not present and verification should be made. If
only one CPU module has all of its LEDs off, it is probable that the kernel power
supply is not functioning. The CPU module has the following indicators and
switch:
RUN LED
—This green LED turns on when the CPU is operating and no faults
are present.
I/O LOCK LED
—This red LED turns on when a major CPU or I/O module
hardware fault has been detected. When a major fault is detected, the fault is
annunciated, all discrete outputs are locked in a de-energized state and all
analog output signals locked to zero current. The reason for a hardware fault can
be viewed through the engineering workstation. After the problem has been
corrected, perform a CPU reset to unlatch the I/O lock logic.
LOW VCC LED
—This red LED turns on when the Kernel power supply’s +5 Vdc
output is out of its specified limits. If this LED is on and remains on after a CPU
reset, replace the Kernel power supply.
WATCHDOG LED
—This red LED turns on if the CPU stops executing the
application program. After the problem has been corrected, perform a CPU reset
to unlatch the watchdog LED logic.
RUN/RESET Switch
—This switch resets the CPU and I/O modules (Kernel)
when in the RESET position (obtained by pressing the switch’s top half). When in
the RUN position (obtained by pressing the switch’s bottom half) the CPU
performs a boot-up sequence, then the Kernel functions normally. To reset the
Kernel momentarily toggle this switch to the Reset position, and return it to the
Run position.
To Replace a CPU module:
1. Read all warnings on pages v and vi of this Volume before replacing any
module.
2. If the control is running and on-line, use the system engineering workstation
to verify that the other CPUs are running without faults.
3. Switch the CPU’s Reset switch to its reset position (push top of switch in).
4. Disconnect any communication cable.
5. Unscrew the CPU module’s captive-screw fasteners and release the module
from the motherboard connectors by pressing the top handles up and the
bottom handles down.