Rockwell-automation T8448 Trusted TMR Zone Interface Module - 40 Chann Manual de usuario descargar pdf (Pagina 24)

Trusted

Module T8448

Issue 14 Apr 10 PD-T8448 24

The least significant 3-bits indicate the operational state of the channel. When configured as an output,

the states have the following meaning.

alue

escription

7 Channel Fault

6 Field fault (e.g. field leakage to 0V or 24V)

5 Short circuit in field wiring or load

4 Output energised (ON)

3 Open circuit in field wiring or load

2 Output de-energised (OFF)

1 No field supply voltage

0 Unused

Table 7 Rack 2: STATE Output bit descriptions

When configured as an input channel, the states are allocated to voltage ranges. The usual definition

for a digital input is as follows.

Value Description

7 Channel Fault

6 Over Range

5 Short circuit

4 Contact Closed

3 Contact Indeterminate

2 Contact Open

1 Open Circuit

0 Under Range

Table 8 Rack 2: STATE Input bit descriptions

Note that channels configured as inputs do not have a direct Boolean indication of the input status. The

Toolset application must be programmed to recognise states 2 and 4 above as open and closed

contact input respectively. All other states are treated as fault conditions; the input status determination

in these states is application specific.

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Rockwell-automation T8448 Trusted TMR Zone Interface Module - 40 Chann Manual de usuario Pagina 24