Rockwell Automation T8424 Trusted TMR 120Vac Digital Input Module - Manual (Page 22)

Trusted TM Module T8424
Issue 8 Sep 11 PD-T8424 22
4.2. Module Status LEDs
There are six module status LEDs on the module front panel; three Healthy, one Active, one Standby,
and one Educated. The Healthy indicators are controlled directly by each module slice. The Active,
Standby, and Educated indicators are controlled by the TMR processor via 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 State Description
Healthy Off No power applied to the module.
Amber Slice is in the start-up state (momentary after installation or
power-up).
Green Slice is healthy.
Red – flashing Fault present on the associated slice but the slice is still
operational or one 24v feed to the chassis has failed
Red (momentary) On installation – power applied to the associated slice.
Red The associated slice is in the off-line state. A critical fault has
been detected and the slice disabled..
Active Off Module is not in the Active state.
Green Module is in the Active (or Maintain) state.
Red – flashing Module is in the shutdown state if the Standby LED is off.
Red – flashing Module is in the off-line state if the Standby LED is also flashing.
Standby Off Module is not in the Standby state.
Green Module is in the Standby state.
Red – flashing Module is in the off-line state. The Active LED will also be
flashing red.
Educated Off Module is not educated.
Green Module is educated.
Green – flashing Module is recognised by the Processor but education is not
complete.
Amber - Flashing Active/standby changeover in progress
Table 14 Module Status Indicators