Rockwell Automation T8402 Trusted Dual 24V dc Digital Input Module - 60 Channel - Manual (Page 24)

Trusted
TM
Module T8402
Issue 13 April 10 PD-T8402 24
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 16 Module Status LEDs