Rockwell-automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Modul Uživatelský manuál stáhnout pdf (Strana 27)

Trusted

Module T8423

Issue 15 Apr 10 PD-T8423 27

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 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 17 Module Status Indicators

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

FPU 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.

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Rockwell-automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Modul Uživatelský manuál Strana 27