Chapter 2
Quick Start
2–9
8.
Procedure: Write Remaining Ladder Logic
Reference
As shown in Figure 2.7, the Channel Data Word contains the information that represents the
temperature value or resistance value of the input channel. Write the remainder of the ladder logic
program that specifies how your RTD/resistance input data will be processed for your application. In
this procedure, the addressing reflects the location of the module as slot 1.
(Complete information about how to do ladder programming using the APS software can be found in
the APS User Manual, Publication 9399-APSUM.)
Chapter 5
(Channel
Configuration,
Data, and Status)
Chapter 6
(Ladder
Programming
Examples)
Chapter 8
(Application
Examples)
your programming
software’s user
manual
Figure 2.7
Input Image Detail
Channel 1 Data Word
Channel 2 Data Word
Channel 3 Data Word
Output Image
SLC 500 Controller
Data Files
Bit 15
Bit 0
Word 1
Word 2
Word 3
.
.
.
Address
I:1.0
Input Image
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Channel 0 Data Word
Word 0
Word 7
(8 words)
Channel 1 Status Word
Channel 2 Status Word
Channel 3 Status Word
Channel 0 Status Word
(Variable RTD/resistance Input Data)
Address
I:1.0
I:1.1
I:1.2
I:1.3
I:1.7
.
.
.
Summary of Contents for SLC 500 1746-NR4
Page 1: ...User Manual SLC 500t RTD Resistance Input Module Cat No 1746 NR4 Allen Bradley AB Spares ...
Page 15: ...Preface P 8 Notes AB Spares ...
Page 37: ...Chapter 2 Quick Start 2 12 Notes AB Spares ...
Page 63: ...Chapter 4 Preliminary Operating Considerations 4 12 Notes AB Spares ...
Page 87: ...Chapter 5 Channel Configuration Data and Status 5 24 Notes AB Spares ...
Page 107: ...Chapter 7 Module Diagnostics and Troubleshooting 7 8 Notes AB Spares ...
Page 117: ...Chapter 8 Application Examples 8 10 Notes AB Spares ...
Page 123: ...Appendix A Specifications A 6 Notes AB Spares ...
Page 125: ...Appendix B RTD Standards B 2 Notes AB Spares ...
