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Chapter 3
Module Data, Status, and Channel Configuration for Analog Input Modules
26
Table 10 - Word/Bit Description
Word
Decimal Bit
Bits 00...11
Read Word 0
Bits 12...15
Bits 00...11
Read Word 1
Bits 12...15
Bits 00...11
Read Word 2
Bits 12...15
Bits 00...11
Read Word 3
Bits 12...15
Bits 00...03
Read Word 4
Bits 04...15
Analog Input Data File With Discrete Input Expansion Module
Table 11
shows the structure for an analog base module with one of the
following 8-input modules:
•
1790-8BV8BX, 1790-T8BV8BX
•
1790-T8A0X discrete expansion module.
Table 11 - 1790D-N4C0, 1790D-TN4C0, 1790D-TN4V0 Input Data File with 8-Bit Discrete
Expansion Module
Bit Position
Word
15
14
13
0
Not Used
1
Not Used
2
Not Used
3
Not Used
4
Not Used
5
Not Used
Table 12 - Word/Bit Description
Word
Decimal Bit
Bits 00...11
Read Word 0
Bits 12...15
Bits 00...11
Read Word 1
Bits 12...15
Bits 00...11
Read Word 2
Bits 12...15
Bits 00...11
Read Word 3
Bits 12...15
Rockwell Automation Publication 1790-UM001B-EN-P - April 2021
Description
Channel 0 input data
Not used: Set to 0
Channel 1 input data
Not used: Set to 0
Channel 2 input data
Not used: Set to 0
Channel 3 input data
Not used: Set to 0
Status bits for individual channels — Bit 00 corresponds to input channel 0, bit
01 corresponds to input channel 1 and so on.
When set (1) indicates:
No field power
Open wire — 4...20 mA current input only
Under range — 4...20 mA current input only
Recoverable module fault (whole channel to be set)
Unrecoverable module fault (whole channel to be set)
Not used: Set to 0
12
11
10
9
8
7
Analog Input Data Channel 0
Analog Input Data Channel 1
Analog Input Data Channel 2
Analog Input Data Channel 3
D7
Description
Channel 0 input data
Not used: Set to 0
Channel 1 input data
Not used: Set to 0
Channel 2 input data
Not used: Set to 0
Channel 3 input data
Not used: Set to 0
6
5
4
3
2
1
S3
S2
S1
D6
D5
D4
D3
D2
D1
0
S0
D0
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