Rockwell Automation 1790-XXXX CompactBlock LDX I/O DeviceNet RTD and Thermocouple - Manual (Page 15)

15
Publication 1790-IN011B-EN-P - April 2003
Once you have properly wired the drop line to the connector,
attach the connector to the block. If applicable, use the
locking screws on the connector to fasten it to the block.
I/O Memory Mapping
1790D-4R0, -T4R0 Input Data File
Word/Bit Descriptions for 1790D-4R0, -T4R0 RTD Module
Word Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 RTD Input Data Channel 0
1 RTD Input Data Channel 1
2 RTD Input Data Channel 2
3 RTD 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 RTD is detected.
Bits 12-15 Not used: Set to 0