5 - module status and input data, Chapter objectives, Reading data from your module – Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module User Manual
Page 38: Module status and input data, Chapter objectives reading data from your module
Chapter
5
5-1
Module Status and Input Data
In this chapter you will read about:
reading data from your module
block transfer read data 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 the Isolated Analog Input Module
(1771-IL series B) Block Transfer Read
Decimal Bits
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Octal Bits
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Word 1
Not used
A
HF
IA
IF
RTS
IS
OR
PU
Status word
2
Not used
8
7
6
5
4
3
2
1
Underrange bits - Channels 1-8
3
Not used
8
7
6
5
4
3
2
1
Overrange bits - Channels 1-8
4
Not used
8
7
6
5
4
3
2
1
Polarity bits - Channels 1-8
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
9
Channel 5 Input
Channel 5 Input
10
Channel 6 Input
Channel 6 Input
11
Channel 7 Input
Channel 7 Input
12
Channel 8 Input
Channel 8 Input
13
Not used
8
7
6
5
4
3
2
1
Low Alarm Bits
14
Not used
8
7
6
5
4
3
2
1
High Alarm Bits
15
8
7
6
5
4
3
2
1
CF
EF
Not used
S
G
O
Calibration Status Bits
Chapter Objectives
Reading Data From Your
Module