Rockwell-automation 1746-NR4 SLC RTD/Resistance Input Module User Manu Manual de usuario Pagina 59
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Publication 1746-UM008B-EN-P - December 2006
Preliminary Operating Considerations 59
Channel scanning is sequential and always occurs starting with the
lowest numbered enabled channel and proceeding to the next highest
numbered channel, for example, channel 0 - channel 1 - channel 2 -
channel 3 - channel 0 - channel 1. Channel scan time is a function of
the filter frequency.
The fastest module update time occurs when only one channel with a
250 Hz filter frequency is enabled.
Module Update Time = 17 ms
The slowest module update time occurs when four channels, each
using a 10 Hz filter frequency, are enabled.
Module Update Time = 4 _ 305 ms = 1220 ms
Channel Scan Time
Filter Frequency
Channel Scan Time
(1)
(1)
The module-scan time is obtained by summing the channel-scan time for each enabled channel. For example, if
3 channels are enabled and the 50 Hz filter is selected, the module-scan time is 3 X 65 ms = 195 ms.
10 Hz 305 ms
50 Hz 65 ms
60 Hz 55 ms
250 Hz 17 ms
TIP
With 3 channels enabled, the module update time is: 3
channels_ 17 ms/channel = 51 ms
- 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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