Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua User Manual Page 61
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Publication 1746-UM001A-US-P
Channel Configuration, Data, and Status 5-13
Engineering Units to Real Units
Example #1: A transducer is being used to measure temperature.
The 4 to 20 mA signal is proportional to 100 to 500°C (212 to 932°F).
The input data is in engineering units, i.e. 4 to 20 mA
where
and
Input value to convert = 5500
The scaled range is 212 to 932°F
The input range is 4000 to 20000
Find: Input Value in °F.
Per the equations above:
Example #2: A transducer is being used to measure temperature.
The 0 to 10V dc signal range is proportional to 0 to 10°C.
The input data is in engineering units, i.e. 0 to 10V dc
where
Input value to convert = 5000.
Find: Input value in °C.
Per the equations above:
4mA
1
µ
A per step
----------------------------------- 40 00=
20mA
1
µ
A per step
----------------------------------- 2000 0=
Slope
932 212
–
()
20000 4000
–
()
-----------------------------------------
·
0.045
·
==
Offset 212 4000 0.045
×()
32
=–=
Scaled Value 5500 0.045
×()
32
279.5
°
F
=
+=
10Vdc
1mV per step
----------------------------------- 10 000=
Slope
10 0
–
()
10000 0
–
()
--------------------------------0.001==
Offset 0 0 0.001
×()
0=
–=
Scaled Value 5000 0.001
5
°
C
=
×
=
- SLC 500™ Analog 1
- Input Modules 1
- Important User Information 2
- Table of Contents 3
- Table of Contents ii 4
- Table of Contents iii 5
- Table of Contents iv 6
- Who Should Use this 7
- Purpose of this Manual 7
- Contents of this Manual 8
- Related Documentation 9
- Common Techniques Used 10
- Allen-Bradley Support 10
- Overview 11
- Hardware Features 12
- System Overview 13
- Module Operation 14
- Module Calibration 14
- Required Tools and 15
- Equipment 15
- Procedures 16
- (Installation and 17
- 01 0 0010 00 0 00 00 00 18
- (Application Examples) 20
- 1112131415 910 8 67450123 21
- (Channel Configuration 21
- Data and Status) 21
- 12 415 14 13 11 10 9 87 65 32 22
- 0 0111 10 0 00 00 00 22
- Installation and Wiring 23
- Environnements dangereux 24
- Electrostatic Damage 24
- 1746-NI16 Power 25
- Requirements 25
- Module Location in Chassis 25
- Fixed Chassis Example 27
- Compliance to European 28
- Union Directives 28
- Module Installation and 29
- Module Installation Procedure 30
- Module Removal Procedure 30
- Terminal Wiring 31
- 1746-NI16V 32
- 1746-NI16I 33
- Wiring Guidelines 34
- Input Devices 35
- Module ID Code 37
- Class 1 and Class 3 38
- Interface 38
- Module Addressing 39
- Class 1 Input Words - Data 41
- Class 3 Input Words - Data 41
- Module Update Time 42
- Channel Sample Order 43
- Channel Filter Frequency 45
- Selection 45
- Aliasing Frequency 46
- Noise Rejection 46
- Response to Slot Disabling 47
- Channel Configuration 49
- Output Image Channel 50
- Configuration Procedure 50
- Channel Configuration Word 51
- Low Calibration 53
- High Calibration 53
- Unused Bit (Bit 3) 54
- Class 1 Handshaking (Bit 2) 55
- Input Image - Channel Data 56
- Scaling the Channel Data 58
- Scaling Examples 60
- Formulas 60
- Scaled-for-PID to Real Units 62
- Channel Status Checking 64
- Class 1 Status Word 66
- Class 3 Status Word 67
- Input Word Bit Definitions 68
- Class 1 Handshaking (Bit 6) 69
- Input Type (Bits 3 and 2) 70
- Module operation vs 71
- Channel Operation 71
- Power-Up Diagnostics 71
- Channel Diagnostics 72
- LED Indicators 73
- Module Status LED 74
- All LEDs 74
- Error Codes 75
- Troubleshooting Flowchart 76
- Replacement parts 77
- Contacting Allen-Bradley 77
- Application Examples 79
- Ladder Files 81
- File 2 (Continued) 82
- File 3 (Continued) 87
- Class 3 Example 96
- Ladder File 2 97
- Data File N7 99
- Publication 1746-UM001A-US-P 100
- Specifications 101
- Physical Specifications 102
- Environmental 102
- Input Specifications 103
- A-4 Specifications 104
- Configuration Worksheet 105
- Appendix 107
- Calibration 109
- D-2 Calibration 110
- Glossary 111
- Glossary 2 112
- Glossary 3 113
- Glossary 4 114
- Numerics 115
- 2 Index 116
- Index 3 117
- 4 Index 118
- Back Cover 119
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