Rockwell-automation T8472 Trusted TMR 120V ac Isolated Output Module Uživatelský manuál stáhnout pdf (Strana 17)

Trusted

Module T8472

Issue 13 Sep 11 PD-T8472 17

he IEC1131 toolset conversion tables may be used to convert the value to engineering units, in this

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

range –32000 to +32000.

3.2.4. Rack 4: CI – Channel Field Current

he CI board returns the field loop current at the output.

Channel Description

1 Field output channel 1 current

2 Field output channel 2 current

16 Field output channel 16 current

Table 9 Rack 4: CI descriptions

The current is the sum value taken from the triplicated module. The current level is reported as an

integer, with the units being

1000

A. This may be used directly, scaled arithmetically or scaled using the

IEC1131 toolset conversion tables.

To scale the value arithmetically simply divide the returned ‘integer’ by 1000 to return the current as

either a REAL or INTEGER as required.

The IEC1131 toolset conversion tables may be used to convert the value to engineering units, in this

case current. The full-scale range for this number format is decimal ±32, corresponding to physical

range –32000 to +32000.

3.2.5. Rack 5: LINE_FLT

Channel Description

1 Field output channel 1 line fault

2 Field output channel 2 line fault

16 Field output channel 16 line fault

Table 10 Rack 5: LINE_FLT 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.

3.2.6. Rack 6: DISCREP

Channel Description

1 Discrepancy status outputs 1 to 16 (output

1 is LSB)

Table 11 Rack 6: DISCREP bit descriptions

Each of the bytes reports the discrepancy status of 8 output channels. The corresponding bit within

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

(rack 2).

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 27 28

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Rockwell-automation T8472 Trusted TMR 120V ac Isolated Output Module Uživatelský manuál Strana 17