Rockwell Automation T8472 Trusted TMR 120V ac Isolated Output Module - Manual (Page 17)

Trusted
TM
Module T8472
Issue 13 Sep 11 PD-T8472 17
The 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
The 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
1
/
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).