7 - module status and input data, Module status and input data, Chapter – Rockwell Automation 1771-IFF/A,D17716.5.116 FAST ANALOG INPUT MODULE User Manual
Page 63: Chapter objectives reading data from your module
Chapter
7
Publication 1771Ć6.5.116 - May 1996
Module Status and Input Data
In this chapter, we describe:
•
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 7.1). The processor’s user program initiates the request to
transfer data from the input module to the processor.
Figure7.1
Word Assignments for Fast Analog Input Module (1771ĆIFF/A) Block Transfer Read
Dec. 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
HF EE CS RTS IS OR PU
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
21
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Offset Calibration Results
22
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Gain Calibration Results
23
binary, 1ms resolution
Time Stamp
24
binary, to 10
µ
s
Scan Time
Where:
PU = Power up bit
OR = Out of range bit
IS = Invalid scaling bit
RTS = Real time sampling bit
HF = Hardware Fault
EE = EEPROM status bits
CS = Calibration status bits
1
These bits are set (1) at approximately the input range limits selected (Table 12.B).
During normal operation, the processor transfers up to 24 words to
the module when you program a BTR instruction to the module’s
address.
Chapter Objectives
Reading Data From Your
Module