Rockwell-automation 1756-CFM ControlLogix Configurable Flowmeter Modul Manual de usuario Pagina 145
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145Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Frequency Accuracy 145
Frequency Average
For frequency average, you must know:
Application frequency (F
in
)
Number of accumulated in sample time (Counts)
Use the following equation to calculate frequency accuracy in totalizer mode
for frequency period:
EXAMPLE
For example, in an application with the following
conditions:
25 meter samples
123Hz frequency
60°C operating temperature
accuracy is determined with the following equation:
Accuracy =
(1) x (100)
(0.02) x ( Number of meter samples) x (F
in
)
Accuracy =
(1) x (100)
(0.02) x (25) x (123)
Accuracy = 1.626 + 0.01
Accuracy = +/- 1.636%
+ 0.01
Value is added to
accuracy to account for
the crystal error over
the temperature range
- User Manual 1
- Important User Information 2
- Summary of Changes 3
- New and Updated 3
- 4 Summary of Changes 4
- Table of Contents 5
- Chapter 4 6
- Installing the Configurable 6
- Table of Contents 7 7
- 8 Table of Contents 8
- Who Should Use 9
- This Manual 9
- Additional Resources 9
- 10 Preface 10
- What this Chapter Contains 11
- Using a ControlLogix 12
- CFM Module 12
- Physical Features 13
- Typical Applications 14
- Understanding Module 15
- Input Capabilities 15
- Output Capabilities 15
- Using Module 16
- Identification and Status 16
- Information 16
- What This Chapter Contains 17
- 1756-CFMLogix controller 18
- Ownership 19
- Using RSNetWorx and 19
- RSLogix 5000 Software 19
- CFM Modules in Local Chassis 20
- CFM Modules in Remote Chassis 20
- Connections 21
- Listen-Only Connections 22
- Configurable Flowmeter 23
- Modules in a Local Chassis 23
- Modules in a Remote 24
- Understanding General 25
- Module Features 25
- Module Fault Reporting 26
- Fully Software Configurable 26
- Electronic Keying 27
- Exact Match 28
- Compatible Keying 29
- Disabled Keying 32
- Producer/Consumer Model 33
- Module Status Information 34
- Flowmeter Inputs 34
- Gate Inputs 34
- Choosing an 35
- Operational Mode 35
- Operating in 36
- High Resolution 36
- Frequency Mode 36
- operate normally 37
- be forced ON or OFF 37
- Low Frequency Clear 38
- Sample Time 38
- Acceleration Calculation 39
- Meter Factor 39
- Trigger On 39
- Tie to Counter 39
- Highest Allowed Frequency 40
- Acceleration Alarm Value 40
- Acceleration 40
- Operating in Totalizer Mode 41
- Using the Totalizer Mode 42
- Using a Prover 43
- Prover Direction 44
- Total Overflow 45
- Total Overrange 45
- Total Overspeed 46
- Total Acceleration 46
- Prover Total 46
- Total Counts 46
- Frequency Period 47
- Gross Volume 47
- Net Volume 47
- Gross Rate 48
- Net Rate 49
- Prover Status 49
- Using the Totalizer 50
- Mode Filler Function 50
- PreTrigger 53
- Fill Mode 53
- Fill Enable 53
- Fill Start 54
- Fill Hold 54
- Fill State 54
- Fill Total 55
- Fill To tal Ta rget 57
- Fill Transition 57
- Fill Transition Timer 57
- Configurable Output 58
- Behaviors 58
- AVERTISSEMENT 62
- Power Requirements 63
- Installing the Module 64
- Keying the Removable 65
- Terminal Block/Interface 65
- Wiring the Removable 66
- Terminal Block 66
- Connect Wires to the RTBs 68
- Wiring the Module 69
- Removing the Removable 74
- Terminal Block from the 74
- Figure 5.2 75
- Removing the Module 76
- Configuring the Configurable 77
- Using this Chapter 78
- Overview of the 78
- Configuration Process 78
- Creating a New Module 80
- Communications Format 82
- Using the Default 83
- Configuration 83
- Altering the Default 84
- Accessing the Tags 85
- Changing Configuration 86
- Information at the Tags 86
- Downloading 87
- Configuration Data 87
- During CFM Module 88
- Operation 88
- Using Message 89
- Instructions 89
- Creating a New Tag 90
- Enter Message Configuration 92
- Communications Pop-Up Screen 93
- Tag Pop-Up Screen 94
- Configuring CFM Modules 95
- Sample Configuration for 101
- Totalizer Mode 101
- Prover Function 101
- Filler Function 108
- Flowmeter Module 115
- Software to Troubleshoot 117
- Your Module 117
- Using RSLogix 5000 117
- Determining Fault Type 118
- Using Error Codes 119
- Software Configuration Tags 121
- Input Tags 128
- Output Tags 132
- Schematics 137
- Output Circuits 139
- 140 Schematics 140
- Frequency Accuracy 141
- Frequency Accuracy in 143
- Frequency Average 145
- 146 Frequency Accuracy 146
- Appendix 147
- Glossary 157
- 158 Glossary 158
- Glossary 159 159
- 160 Glossary 160
- 162 Index 162
- Index 163 163
- 164 Index 164
- Index 165 165
- 166 Index 166
- Rockwell Automation Support 168
- Documentation Feedback 168
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