Rockwell Automation T8110B/T8110 Trusted TMR Processor - Manual (Page 26)

Trusted
TM
TMR Processor T8110B/T8110
Issue 18 Feb 08 PD-T8110B/T8110 26
4.6. Module Status LEDS
There are eleven status LEDs on the Processor front panel; three Healthy, one Active, one Standby,
one Educated, one Run, one Inhibit, one System Healthy, and two User. The Healthy indicators are
controlled directly by each module slice. All LEDs are controlled by the FPU. The FPU receives data
from each of the module slices. The FPU performs a 2-oo-3 vote on each data bit from the slices and
sets the indicators accordingly.
The module status LED states and their meanings are described as follows:
LED INDICATION
Healthy Overall health of each processor slice:
Steady green = healthy
Steady red
= slice failed.
Active Steady green when the Processor is in the Active mode.
Standby Steady green when the Processor is in the Standby mode.
Flashing green when the Processor has change from the Active to
the Standby mode.
Educated Steady green when the Processor is Educated.
Flashing green when being Educated.
Off when the Processor is not Educated, or the application program
has stopped.
Run Flashing green when the Processor is operating normally with full
integrity.
Steady green in Standby.
Off when the application program in the Active Processor has
stopped.
Inhibit Flashing green when any input or output is locked. This LED also
flashes green if a changeover from Active to Standby is attempted
when the current Standby Processor is fitted with a different system
configuration.
System Healthy System health:
Steady green = healthy
Flashing red
= system boot-up, system fault, self-test fail, IMB
error. Trusted TM I/O module error, Active/Standby
module failing to respond, module slice error,
channel fault, or a module is being simulated.
Regent I/O module error, module failing to
respond.
Off = illegal state.
User 1 and User 2 General purpose red LEDs for use under software control.
Note: If the Healthy LED is green flashing and power is switched off, then on again, the associated
slice may fail to operate. When the Healthy is flashing red, processing is automatically
switched to the Standby Processor. The faulty Processor must be replaced.