Rockwell Automation 1790-XXXX CompactBlock LDX I/O DeviceNet RTD and Thermocouple - Manual (Page 16)

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Publication 1790-IN011B-EN-P - April 2003
1790D-4T0, -T4T0 Input Data File
Word/Bit Descriptions for 1790D-4T0, -T4T0 Thermocouple Module
Word Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 Thermocouple Input Data Channel 0
1 Thermocouple Input Data Channel 1
2 Thermocouple Input Data Channel 2
3 Thermocouple Input Data Channel 3
4 Not Used S11 S10 S9 S8 Not Used S3 S2 S1 S0
Word Decimal Bit Description
Read Word 0 Bits 00-15 Channel 0 input data
Read Word 1 Bits 00-15 Channel 1 input data
Read Word 2 Bits 00-15 Channel 2 input data
Read Word 3 Bits 00-15 Channel 3 input data
Read Word 4
Bits 00-03 Underrange for individual channels - Bit 00 corresponds to
input channel 0, bit 01 corresponds to input channel 1 and
so on.
When set (1) the input signal is below the input channel’s
minimum range.
Bits 04-07 Not used: Set to 0
Bits 08-11 Overrange for individual channels - Bit 08 corresponds to
input channel 0, bit 09 corresponds to input channel 1 and
so on.
When set (1) the input signal is above the input channel’s
maximum range, or open thermocouple is detected.
Bits 12-15 Not used: Set to 0