Rockwell-automation 1771-IR Series D RTD Input Module User Manual User Manual download pdf (Page 13)

1–3Overview of the RTD Input Module

    

5. The processor and module determine that the transfer was made

without error, and that input values are within specified range.

6. Your ladder program can use and/or move the data (if valid)

before it is written over by the transfer of new data in a

subsequent transfer.

7. Your ladder program should allow write block transfers to the

module only when enabled by the operator at power–up.

The accuracy of the input module is described in Appendix A.

In this chapter you read about the functional aspects of the input

module and how the module communicates with programmable

controllers.

Accuracy

Chapter Summary

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 78 79

   1
 1
Important User Information 2
   3
Related Products 4
Product Compatibility 4
Related Publications 5
Using This ManualP–4 6
Table of Contents 7
Configuring Your RTD 8
Module Status and Input 8
Calibrating Your Module 8
Table of Contents toc-iii 9
Table of Contents 10
Overview of the RTD Input 11
How Analog Modules 12
Communicate with 12
Programmable Controllers 12
Accuracy 13
Chapter Summary 13
Installing the RTD Input 15
Calculate Power 16
Requirements 16
Determine Module 16
Placement in the I/O 16
Key the Backplane 17
Connector 17
Install the Module and 17
Field Wiring Arm 17
Connect Wiring to the 18
Ground the Chassis and Module 20
Interpret Status Indicators 21
  23
PLC-2 Program Example 24
Program Action 25
PLC-3 Program Example 26
PLC-5 Program Example 27
Module Scan Time 28
Configuring Your RTD Module 29
Data Format 30
RTD Type 30
Units of Measure 30
Real Time Sampling 31
Configuring Block for a 32
Block Transfer Write 32
Bit/Word Descriptions 32
calibration complete 34
Module Status and Input Data 35
   39
Performing 40
Auto-calibration 40
Gain Calibration 42
Performing Manual 43
Calibration 43
Refer to the table below 44
Calibration 45
 47
(1771-IR/D) 48
7–4 Troubleshooting 50
 51
  53
PLC-3 Family Processors 54
PLC-5 Family Processors 55
Programming ExamplesB–4 56
   57
Signed-magnitude Binary 58
Two's Complement Binary 59
Data Table FormatsC–4 60
Block Transfer (Mini-PLC-2 61
Setting the Block Length 63
(Multiple GET Instructions 63
2 and 4-Wire RTD Sensors 65
2 and 4–Wire RTD SensorsE–2 66
Connecting 4-Wire 67
2 and 4–Wire RTD SensorsE–4 68
Differences Between Series A 69
RTD Modules and Series B. C 69
CSA Hazardous Location 73
Approval 73
AllenĆBradley 77
Publication Problem Report 77
BUSINESS REPLY MAIL 78
Worldwide representation 79

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