User guide

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Module T8449
Issue 13 Apr 10 PD-T8449 29
3.2.7. Rack 7: LINEFLT
The Line Fault board reports line fault conditions for control output and feedback input circuits.
Channel
Field
Device
Description
1 Control output line fault
2
1
Feedback input line fault
3 Control output line fault
4
2
Feedback input line fault
39 Control output line fault
40
20
Feedback input line fault
Table 13 Rack 7: LINEFLT descriptions
The line fault input state is reported as true (logic ‘1’) for a line fault condition (open circuit, short circuit,
and no field supply voltage). The logic state is the majority voted value.
3.2.8. Rack 8: DISCREP
Channel Description
1 Discrepancy status channels 1 to 16
(output 1 is LSB)
2 Discrepancy status channels 17 to 32
(output 17 is LSB)
3 Discrepancy status channels 33 to 40
(output 33 is LSB)
Table 14 Rack 8: DISCREP bit descriptions
Each of the words reports the discrepancy status of 16 output channels. The corresponding bit within
the word is set to ‘1’ when a discrepancy condition is detected on either the control output state or
feedback input state for a particular field device (rack 2).