5 - module status and input data, Module status and input data, Chapter objectives reading data from your module – Rockwell Automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Module User Manual
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Chapter
5
5-1
Module Status and Input Data
In this chapter you will read about:
reading data from your module
block transfer read block format
Block transfer read programming moves status and data from the input
module to the processor’s data table in one I/O scan (Figure 5.1). The
processor’s user program initiates the request to transfer data from the
input module to the processor.
Figure 5.1
Word Assignments for Analog Input Module (1771ĆIFE)
Block Transfer Read
Decimal Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02
01
00
Description
Octal Bits
17 16 15 14 13 12 11 10 07 06 05 04 03 02
01
00
Description
Word 1
Not Used
Diagnostic Bits
Diagnostics
2
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Data underrange for channels 1-16
1
3
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Data overrange for channels 1-16
1
4
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Data polarity for channels 1-16
5
Channel 1 Input
Channel 1 Input
6
Channel 2 Input
Channel 2 Input
7
Channel 3 Input
Channel 3 Input
8
Channel 4 Input
Channel 4 Input
⇓
⇓
⇓
⇓
20
Channel 16 Input
Channel 16 Input
1
These bits are set (1) at approximately the input range limits selected (Table 5.B).
Chapter Objectives
Reading Data From Your
Module