Rockwell Automation T8448 Trusted TMR Zone Interface Module - 40 Channel - Manual (Page 34)

Trusted
TM
Module T8448
Issue 14 Apr 10 PD-T8448 34
4.3. I/O Status Indicators
There are 40 channel status indicators on the module front panel, one for each field input/output.
These 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 input/output status indicator mode is dependent upon the numerical state of the channel. Each
state can be defined to have a particular indicator mode: off, green, red, flashing green, or flashing red.
Note that although it may be possible to specify yellow (green and red together) in the System
Configurator, this is not recommended.
The configurable indicator modes allow users to customise the status indications to suit individual
application requirements. Without customisation, the default indicator modes are as described below:
INDICATOR STATE DESCRIPTION
Off Output is Off or Input is Open
Green Channel is On or Input is Closed
Green – flashing No Output Load or Input/Output Open Circuit
Red Output short circuit (output over current protection triggered and channel is
latched off) or input short circuit
Red – flashing Channel fault, or no field supply voltage
Table 20 I/O Status LEDs
Note: The LEDs indicating channel status may be configured to suit user requirements by
implementing the procedure for configuring the System.INI file detailed in PD-8082B.