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Compact IO™ Isolated HART Analog Input Module
User's Manual 0300215-03 Rev. A
6-18
Section 6.7
Determining
Module
Update Time
The module update time is defined as the time required for the module to sample and
convert the input signals of all enabled input channels and provide the resulting data
values to the processor. The module update time is equal to the slowest channel step
response.
6.7.1 Calculating Module Update Time
To determine the module update time, locate the channel with the slowest step response,
this will be the approximate module update time.
Example:
Channel 0: +/- 10 Vdc with 60 Hz filter
Channel 1: 4 to 20 mA with 28.5 Hz filter
Channel 2: 4 to 20 mA with 300 Hz filter
Channel 3: 4 to 20 mA with 28.5 Hz filter
Module Update Time
= slowest step response = 28.5Hz or 108 ms
- Compact™ I/O 1
- Isolated HART 1
- Analog Module 1
- Table of Contents 3
- Preface 7
- Conventions 8
- Used in This 8
- Chapter 1 9
- Module Overview 9
- Do No t Remov e RTB Un der 10
- Power Unless Area is Non 10
- Hazardous 10
- Section 1.5 11
- System 11
- Overview 11
- 1.5.1 System Operation 11
- Section 1.6 12
- Module 12
- Operation 12
- Chapter 2 13
- Quick Start for Experienced 13
- Chapter 3 19
- Installation and Wiring 19
- 3.3.3 Remove Power 21
- 3.3.4 Selecting a Location 21
- Section 3.4 22
- System Assembly 22
- Section 3.5 23
- Mounting 23
- 3.5.1 Minimum Spacing 23
- 3.5.2 Panel Mounting 23
- 3.5.3 DIN Rail Mounting 24
- 3.7.2 Terminal Door Label 26
- 3.7.5 Wiring the Module 27
- 3.7.6 Wiring Diagram 28
- 3.7.7 Calibration 28
- Chapter 4 29
- Configuring the IF4IH for 29
- CompactLogix Using 29
- RSLogix 5000 29
- Section 4.2 33
- The Add-On 33
- Profile 33
- Section 4.4 36
- Project Tags 36
- Project 38
- Chapter 5 41
- Configuring the IF4IH for a 41
- MicroLogix 1500 Using 41
- RSLogix 500 41
- Section 5.2 42
- Configuring 42
- 1500 System 42
- Section 5.3 46
- Using the 46
- Ladder Sample 46
- Chapter 6 51
- Module Data, Status, and 51
- Channel Configuration 51
- Section 6.4 55
- Configuration 55
- Raw/Proportional Data 62
- Engineering Units 62
- Scaled-for-PID 62
- Percent Range 62
- 6.4.9 Channel X 64
- 6.4.10 Channel X 64
- 6.5.8 Reserved (Words 24…45) 66
- Section 6.6 67
- Determining 67
- Effective 67
- Resolution 67
- Section 6.7 68
- Update Time 68
- Chapter 7 69
- Enabling and Using HART on 69
- Table 7-1 (HART Packet 0) 73
- Table 7-2 (HART Packet 1) 74
- Figure 7-4 (Packet Ladder) 77
- 7.2.3 Packet Interval 78
- Section 7.3 79
- Sending 79
- Messages 79
- 7.3.3 Processing a Message 81
- Figure 7-6 Sending Message 82
- Figure 7-8a (Message Ladder) 84
- Figure 7-8b 85
- Figure 7-8c 86
- Figure 7-8d 87
- Figure 7-8e 88
- Figure 7-8f 89
- Figure 7-8g 90
- Figure 7-8h 91
- Figure 7-8i 92
- Figure 7-8j 93
- Figure 7-8m 95
- Figure 7-8n 96
- Figure 7-8o 97
- Section 7.4 98
- Module Specific 98
- Commands 98
- Attention 103
- Figure 7-10b 107
- Figure 7-10c 108
- Figure 7-10d 109
- Figure 7-10e 110
- Section 7.5 111
- HART Protocol 111
- 7.5.1 Message Format 111
- Chapter 8 117
- Programming Examples 117
- Figure 8-4b 121
- 8.2.1 MAIN Routine 123
- 8.2.2 PACKETS Routine 124
- Figure 8-6b 125
- Figure 8-6c 126
- 8.2.3 MSG_TO_MOD Routine 127
- Figure 8-7b 128
- Figure 8-7c 129
- Figure 8-7d 130
- Figure 8-7e 131
- Figure 8-7f 132
- Figure 8-7g 133
- Figure 8-7h 134
- Figure 8-7i 135
- Figure 8-7j 136
- Figure 8-7k 137
- Figure 8-7l 138
- Figure 8-7m 139
- Figure 8-7n 140
- Figure 8-7o 141
- Figure 8-7p 142
- Figure 8-7q 143
- 8.2.4 SRC_CHECK Routine 144
- Figure 8-8b 145
- 8.2.5 DEST_CHECKSUM Routine 146
- Figure 8-9b 147
- 8.2.6 HART_MSG Routine 148
- Figure 8-10b 149
- Figure 8-10c 150
- Figure 8-10d 151
- Figure 8-10e 152
- Figure 8-10f 153
- Figure 8-10g 154
- Figure 8-10h 155
- Figure 8-10i 156
- Figure 8-10j 157
- Figure 8-10k 158
- 8.2.7 WORD_BYTE Routine 159
- Figure 8-11b 160
- Figure 8-11c 161
- 8.2.8 HART_CHECK Routine 162
- Figure 8-12b 163
- 8.2.9 BYTE_WORD Routine 164
- Figure 8-13b 165
- Chapter 9 167
- Diagnostics and 167
- Troubleshooting 167
- 1514131211109876543210 169
- 0000000000000000 169
- Value Bits 11 170
- Description 170
- Section 9.8 171
- Inhibit Function 171
- Appendix A 173
- Module Specifications 173
- Section A.2 174
- Environmental 174
- Specifications 174
- Appendix B 177
- HART Universal and Common 177
- Practice Commands 177
- Wire Size · 3-9 183
- Wiring Diagram · 3-10 183
- Wiring Guidlines · 2-3 183
- Getting Technical 185
- Assistance 185
- Declaration of 185
- Conformity 185
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