Rockwell-automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Manual de usuario Pagina 51
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Publication 1794-UM065B-EN-E - September 2010
1794-IF8IH and 1794-OF8IH Configuration 39
Input Filter Cutoff (8 of 3 bits)
ADC Filter Frequency for channel. This parameter affects channel accuracy:
See the table below.
Data Table Reference: filter cutoff, Configuration Words 4…7, bits 0…2,
8…10.
ADC Conversion Rate, Channel Update Time and Repeatability
The following table shows the channel update time, channel settling time,
repeatability, 50 Hz normal mode rejection and 60 Hz normal mode rejection
for each A/D conversion rate. The repeatability is based on six-sigma RMS
noise levels.
Data Format (8 of 4 bits)
Specifies the module data format. Formats 2, 6 and 8…15 are not assigned. If
they are selected, a configuration failure will be declared. The configuration is
not accepted and the last valid configuration will be used.
Formats 5, 12, 13 and 14 are 2's complement data formats, and will return data
in that form.
Accuracy vs Filter Cutoff
Filter Cutoff
7
(1)
6
(1)
543210 (Default)
Frequency n/a n/a 470 Hz 62 Hz 19.6 Hz 16.7 hz 10 Hz 4.17 Hz
Word Setting n/a n/a 101 100 011 010 001 000
(1)
For settings of 6 & 7 the module will return a configuration error and remain in the last properly configured state.
ADC Conversion Rate Effects
A/D
Conversion
Rate
Channel
Update
Time
Channel
Settling
Time
Repeatability 50 Hz
Rejection
60 Hz
Rejection
4.17 Hz 240 msec 480 msec 0.12 μa 74 dB 74 dB
10.0 Hz 100 msec 200 msec 0.23 μa 69 dB 69 dB
16.7 Hz 60 msec 120 msec 0.31 μa 80 dB
19.6 Hz 51 msec 101 msec 0.35 μa 90 dB
62 Hz 16 msec 32 msec 0.59 μa
470 Hz 2 msec 4 msec 2.27 μa
- Analog Modules 1
- Important User Information 2
- Summary of Changes 3
- Related Documentation 5
- Table of Contents 7
- 1794-IF8IH and 1794-OF8IH 8
- Table of Contents iii 9
- Table of Contents v 11
- What FLEX I/O Analog 13
- Modules Do 13
- Communicate with 14
- Programmable Controllers 14
- Physical Features of 15
- Your Module 15
- Use Alarms on the Input 15
- Overrange Alarm 16
- Underrange Alarm 16
- Remote Fault Alarm 16
- Local Fault Alarm 17
- Use the HART Capabilities 18
- HART Implementation 18
- Features 19
- Select Your Analog Input 20
- Module Operating Features 20
- Data Format 21
- Select Your Analog Output 22
- Latch Mode 23
- Global Reset 23
- Diagnostic Data error 11 24
- = data out of range 24
- Understand Image Table 25
- Mapping and Bit/Word 25
- Descriptions 25
- ATTENTION 27
- Install the Module 28
- Mount on a Panel or Wall 30
- Description Description 31
- IMPORTANT 32
- Label here 33
- Wire the Terminal Base 34
- Connect Wiring to the FLEX 34
- I/O HART Analog Modules 34
- Terminal Base Unit 35
- Ground the Module 36
- Use Programming Software 37
- About the ControlNet and 38
- EtherNet Adapters 38
- Communication Over the 38
- FLEX I/O Backplane 38
- Scheduled Data Transfer 39
- Unscheduled Data Transfer 39
- Module I/O Mapping 39
- I/O Structure 40
- Fault State Data 40
- Device Actions 40
- Data Transfer Types 43
- Configuration Parameters 44
- Byte Order (2 of 2 bits) 47
- Examples 49
- Fault Mode (8 of 1 bit) 50
- Low Alarm Limit (8 of 16 bit) 54
- Real Time Data (RTD) 57
- Profile, Primary Input 57
- Parameters 57
- Profile, Primary Status 58
- High Alarm (8 of 1 bit each) 60
- Low Alarm (8 of 1 bit each) 60
- Loop Alarm (8 of 1 bit each) 61
- HART Status Fields 63
- Secondary Input Data 64
- Table, Cyclic EDT Input 64
- HART PV Status (8 of 8 bits): 67
- Bit 5 Reserved 68
- Bit 6 Reserved 68
- Bit 7 Reserved 68
- HART PV Status 68
- Interpret the Status 69
- Indicators 69
- Module Configuration for 69
- Little Endian Byte Order 75
- Word Swap BYTE ORDER 75
- Profile, Status Parameters 82
- Fault Alarm (8 of 1 bit each) 83
- Diagnostic Data (1 of 8 bits) 83
- Profile, Output Parameters 85
- Global Reset (1 of 1 bit) 86
- Status Indicators 87
- Configure Module Messaging 89
- HART Configuration Quick 90
- Field Value Definition 100
- HART Failed Reason Code 104
- Chapter Summary 106
- Troubleshoot Your Module 107
- FLEX I/O HART Module Commands 109
- Commands 110
- Universal Commands 110
- Common Practice 110
- Device-specific Commands 111
- Appendix 113
- Overview 113
- Message Structure 113
- Burst Mode (not supported) 114
- Start Character 115
- HART Address 115
- HART Command 115
- Byte Count 116
- Check Byte 116
- Response Code 116
- Communication 127
- HART Frame Enhancements 130
- Background Information 131
- Configuration 132
- HART Disable 133
- Channel Data Format 133
- Channel Data Formats 134
- Digital Filters 135
- High Alarm Limit 138
- Low Alarm Limit 138
- Remote High High Alarm Limit 138
- Input Map 139
- High Alarm 140
- Low Alarm 140
- Out of Range 141
- Second Alarm 141
- Diagnostic Status 141
- HART Fault 142
- HART Current Fault 142
- HART Transmitter Present 143
- Local Fault Mode 147
- Digital Mode 152
- Digital Fault Mode 153
- Analog Fault Value 153
- HART Command 3 Disable 153
- Digital Data 154
- Fault Reset 154
- Analog Data 154
- 152 Index 160
- How Are We Doing? 161
- BUSINESS REPLY MAIL 162
- Rockwell Automation 164
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