Rockwell-automation T8431 Trusted TMR 24Vdc Analogue Input Module - 40 Manual de usuario descargar pdf (Pagina 26)

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Module T8431

Issue 16 Sep 11 PD-T8431 26

4.3. I/O Status LEDs

There are 40 input channel status LEDs on the module front panel, one for each field input. These

indicators are controlled by the FPU. The FPU receives data from each of the module slices. The

PU performs a 2-oo-3 vote on each data bit from the slices and sets the indicators accordingly.

The input status LED mode is dependent upon the voltage level of the field I/O signal. Each field input

voltage is measured and compared to six threshold levels (four configurable and two fixed) which

produce seven threshold bands. Each threshold band can be defined to have a particular indicator

mode: off, green, red, flashing green, or flashing red.

The configurable voltage thresholds and LED modes allow users to customise the input measurement

and status indications to suit individual application requirements. Without customisation, the default

indicator modes are suitable for analogue inputs as described below:

INDICATOR STATE DESCRIPTION

Off ’Normal’ (states 1,2,3)

Green - steady ‘High alarm’ (states 4,5)

Green – flashing Overrange (state 6)

Red – flashing Underrange (state 0) or Channel Fault (8 to 15)

Table 18 Default I/O Status Indicators

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.

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 32 33

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Rockwell-automation T8431 Trusted TMR 24Vdc Analogue Input Module - 40 Manual de usuario Pagina 26