Rockwell Automation T8431 Trusted TMR 24Vdc Analogue Input Module - 40 Channel - Manual (Page 25)

Trusted
TM
Module T8431
Issue 16 Sep 11 PD-T8431 25
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 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 fatal 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 fatal 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 fatal state. The Active LED
will also be flashing red.
Educated Off
Green
Green – flashing Module is not educated.
Module is educated.
Module is recognised by the Processor but
education is not complete.
Amber - Flashing Active/standby changeover in progress
Table 17 Module Status Indicators