Rockwell-automation 1746-NR4 SLC RTD/Resistance Input Module User Manu Manual do Utilizador descarregar pdf (Página 49)

Publication 1746-UM008B-EN-P - December 2006

Install and Wire the Module 49

5. Use the RTD module to determine the temperature equivalent to

the fixed precision resistor and cable combination.

6. Calculate the offset value by subtracting the calculated

calibration temperature from the measured temperature.

7. Reconnect the RTD to the cable.

8. Use ladder logic to apply (subtract) the offset from the measured

temperature to obtain corrected temperature.

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SLC 500 1
RTD/Resistance 1
Input Module 1
Important User Information 2
Summary of Changes 3
New Information 3
4 Summary of Changes 4
Table of Contents 5
6 Table of Contents 6
Use This Manual 7
Who Should Use This 7
Purpose of This Manual 7
Contents of this Manual 8
Common Techniques Used 9
10 Preface 10
Overview 11
12 Overview 12
RTD Compatibility 13
14 Overview 14
Overview 15 15
Hardware Overview 16
System Overview 18
System Operation 19
LED Indicator Status 20
22 Overview 22
Quick Start Guide 23
Procedures 24
Insert the Module 25
Wire the Module 25
Configure Your I/O 28
Output Image Detail 29
30 Quick Start Guide 30
Input Image Detail 31
Monitoring Status 32
Install and Wire the Module 33
NR4 Power Requirements 34
Module Location in Chassis 35
General Considerations 37
Module Installation and 38
Install the Module 39
Remove the Module 39
Terminal Wiring 40
IMPORTANT 41
Cable Examples 46
Calibration 47
Single-point Calibration 48
Module ID Code 51
Module Addressing 52
O : 4 . 2 53
I : 3 . 6 53
Channel Filter Frequency 54
Selection 54
Effective Resolution 55
10 Hz Filter Notch Frequency 56
50 Hz Filter Notch Frequency 57
60 Hz Filter Notch Frequency 57
250 Hz Filter Notch Frequency 57
Scanning Process and 58
Channel Timing 58
Scanning Cycle 60
Channel Turn-on, Turn-off 61
Response to Slot Disabling 61
Input Response 62
Output Response 62
Procedure 64
Enter the Configuration Data 65
Scaled–for–PID 68
Temperature Counts 69
-200 °C (-328 °F) -32,768 69
+630 °C (1166 °F) +32,767 69
Scaling Examples 71
1746-NR4 73
Scaling Select (Bits 13-14) 78
User-set Scaling 79
Limit Scale Words 80
Channel Data Word 81
Channel Status Checking 82
Bits Define 83
These bit settings 83
Indicate this 83
1514131211109876543210 83
Input Type Status (Bits 0…3) 84
Excitation Current (Bit 12) 85
Broken Input Error (Bit 13) 85
Out-of-range Error (Bit 14) 86
Configuration Error (Bit 15) 86
Ladder Programming Examples 87
Initial Programming 88
Configuration Word Setup 89
Copy File Data Flow 89
Programming Procedure 90
Dynamic Programming 91
Verify Channel 92
Configuration Changes 92
Interface to the PID 93
Instruction 93
Use the Proportional 95
Counts Data Format with 95
Monitor Channel Status 96
Invoke Autocalibration 97
Introduction 99
Module Operation vs 99
Channel Operation 99
Power Turn-on Diagnostics 100
Channel Diagnostics 100
LED Indicators 100
Error Codes 102
Out-of-range Detection 103
Troubleshooting Flowchart 105
Replacement Parts 106
Contact Rockwell 106
Automation 106
Application Examples 107
Channel Configuration 108
Program Listing 109
Program to Convert °F to BCD 110
Supplementary Example 111
Degrees Selector Switch 114
Specifications 117
118 Specifications 118
Module Accuracy 119
120 Specifications 120
Specifications 121 121
122 Specifications 122
RTD Standards 123
124 RTD Standards 124
Configuration Worksheet 125
I/O Configuration 131
132 I/O Configuration 132
I/O Configuration 133 133
6. Click OK 134
Glossary 135
136 Glossary 136
Glossary 137 137
138 Glossary 138
140 Index 140
Index 141 141
142 Index 142
How Are We Doing? 143
BUSINESS REPLY MAIL 144
Rockwell Automation 148

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