Rockwell-automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Modul Uživatelský manuál stáhnout pdf (Strana 22)

Trusted

Module T8423

Issue 15 Apr 10 PD-T8423 22

The IEC1131 TOOLSET conversion tables may be used to convert the input value to engineering

units, in this case voltage. The full-scale range for this number format is decimal ±256, corresponding

to physical range –32768 to +32767. Other units may be chosen depending on the numeric resolution

and span of the desired result.

When the TMR Processor detects a 2oo3 channel fault or discrepancy, or if the input module is

simulated, the input voltage numeric value is reported as –2048.

3.2.4. Rack 4: SPARE

This rack is reserved for future used and is included to promote consistency with other High Integrity

I/O modules.

3.2.5. Rack 5: LINE_FLT

Channel Description

1 Field input channel 1 line fault

2 Field input channel 2 line fault

40 Field input channel 40 line fault

Table 11 Rack 5: LINE_FLT

The line fault input is reported as true (logic ‘1’) for a line fault condition (open circuit, indeterminate, or

short circuit condition). The logic state is the majority voted value.

When the TMR Processor detects a 2oo3 channel fault or discrepancy, or if the input module is

simulated, the line fault input is set to True.

3.2.6. Rack 6: DISCREP

Channel Description

1 Discrepancy status inputs 1 to 16 (input 1 is

LSB, bit 0)

2 Discrepancy status inputs 17 to 32 (input 17

is LSB, bit 0)

3 Discrepancy status inputs 33 to 40 (input 33

is LSB, bit 0)

Table 12 Rack 6: DISCREP bit descriptions

Each of the integers reports the discrepancy status of 16 input channels. The corresponding bit within

the integer is set to ‘1’ when a discrepancy condition is detected on that input channel’s input state

(rack 2). For example, if slice B of the input module reports the state of channel 4 as state 5, while

slices A and C report channel 4 as state 2, then Slice B has a channel discrepancy for channel 4. In

this case, bit 3 of channel 1 on the Discrepancy board would be set to ‘1’.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 32 33

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Rockwell-automation T8423 Trusted TMR 35 - 120 Vdc Digital Input Modul Uživatelský manuál Strana 22