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Compact IO™ Isolated HART Analog Output Module
User’s Manual 0300217-03 Rev. A
6-8
Data Format
This selection allows the user to define the channel’s data format for any of the
following:
Raw/Proportional Data
The raw/proportional data format provides the best resolution of all the
supported data formats.
If you select the raw/proportional data format for a channel, the output
command word
1
will be a number between -32767 and +32767. For example, if
a 4 to 20 mA output type is selected, 4 mA corresponds to -32767 counts and 20
mA corresponds to +32767.
Engineering Units
When using this data format, the module scales the output command word
1
to
the actual engineering values for the selected output type. Values are expressed
with an assumed decimal place. Refer to Table 6-8 (Data Formats).
The resolution for the selected data format is dependent on the output type
selected.
Scaled-for-PID
The PID algorithm for the MicroLogix 1500 and other Allen-Bradley controllers
(i.e. SLC) utilize an engineering range of 0 to 16383. The scaled for PID format
allows the programmer to assign the output command word
1
for the selected
channel directly to the PID instruction’s CV variable, thus eliminating the need
for further scaling.
Percent Range
The output command word
1
for the selected channel is scaled using a range of 0
to +10000 counts. For example, if a 4 to 20 mA output type is selected, 4 mA
corresponds to 0 counts and 20 mA corresponds to +10000 counts.
Note: 10000 counts represent 100.00 percent.
Table 6-5 (Data Formats)
Output Type Engineering Scaled for PID Proportional Counts Percent
0 – 20 mA 0 to 20000 0 to 16383 -32768 to 29646 0 to 10000
4 – 20 mA 4000 to 20000 0 to 16383 -29822 to 29085 0 to 10000
Reserved
Reserved for future expansion and should be set to zero.
6.3.14 Fault Value (Words 2, 10, 18, 26)
During a processor fault condition, the associated output channel will be driven to this
value.
Note: The range of this value is defined by the data format selected for the channel.
6.3.15 Program/Idle Value (Words 3, 11, 19, 27)
During a processor program or idle mode, the associated output channel will be driven to
this value.
1
Module output words 0 through 3 for channel 0 through 3, respectively.
- 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
- Section 1.3 10
- Hardware 10
- Features 10
- Section 1.4 11
- System 11
- 1.4.1 System Operation 11
- Section 1.5 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
- 3.5.2 Panel Mounting 24
- 3.7.2 Terminal Door Label 26
- 3.7.5 Wiring the Module 27
- 1.1.6 Wiring Diagram 28
- 3.7.7 Calibration 28
- Chapter 4 29
- Configuring the OF4IH for 29
- CompactLogix Using 29
- RSLogix 5000 29
- Section 4.4 36
- Project Tags 36
- Project 37
- Figure 4-11 (Output Tags) 39
- Section 4.5 40
- Sample Project 40
- Chapter 5 43
- Configuring the OF4IH for a 43
- MicroLogix 1500 Using 43
- RSLogix 500 43
- Section 5.3 48
- Using the 48
- Ladder Sample 48
- Chapter 6 53
- Module Data, Status, and 53
- Channel Configuration 53
- Configuration 56
- 6.3.12 Channel X 57
- 6.3.13 Channel X 59
- 6.3.20 Pad (Word 32) 62
- Chapter 7 67
- Enabling and Using HART on 67
- Table 7-1 (HART Packet 0) 71
- Table 7-2 (HART Packet 1) 72
- Figure 7-4 (Packet Ladder) 75
- 7.2.3 Packet Interval 76
- Section 7.3 77
- Sending 77
- Messages 77
- 7.3.3 Processing a Message 79
- Figure 7-6 Sending Message 80
- Figure 7-7 Receiving Message 81
- Figure 7-8a (Message Ladder) 82
- Figure 7-9b 83
- Figure 7-9c 84
- Figure 7-9d 85
- Figure 7-9e 86
- Figure 7-9f 87
- Figure 7-9g 88
- Figure 7-9h 89
- Figure 7-9i 90
- Figure 7-9j 91
- Figure 7-9k 92
- Figure 7-9l 93
- Figure 7-11b 102
- Figure 7-11c 103
- Figure 7-11d 104
- Figure 7-11e 105
- Section 7.5 107
- HART Protocol 107
- Overview 107
- 7.5.1 Message Format 107
- Attention 113
- Figure 8-7b 115
- 8.2.1 MAIN Routine 117
- 8.2.2 PACKETS Routine 118
- Figure 8-6b 119
- Figure 8-6c 120
- 8.2.3 MSG_TO_MOD Routine 121
- Figure 8-7c 123
- Figure 8-7d 124
- Figure 8-7e 125
- Figure 8-7f 126
- Figure 8-7g 127
- Figure 8-7h 128
- Figure 8-7i 129
- Figure 8-7j 130
- Figure 8-7k 131
- Figure 8-7l 132
- Figure 8-7m 133
- Figure 8-7n 134
- Figure 8-7o 135
- Figure 8-7p 136
- Figure 8-7q 137
- 8.2.4 SRC_CHECK Routine 138
- Figure 8-8b 139
- 8.2.5 DEST_CHECKSUM Routine 140
- Figure 8-9b 141
- 8.2.6 HART_MSG Routine 142
- Figure 8-10b 143
- Figure 8-10c 144
- Figure 8-10d 145
- Figure 8-10e 146
- Figure 8-10f 147
- Figure 8-10g 148
- Figure 8-10h 149
- Figure 8-10i 150
- Figure 8-10j 151
- Figure 8-10k 152
- 8.2.7 WORD_BYTE Routine 153
- Figure 8-11b 154
- Figure 8-11c 155
- 8.2.8 HART_CHECK Routine 156
- Figure 8-12b 157
- 8.2.9 BYTE_WORD Routine 158
- Chapter 9 161
- Diagnostics and 161
- Troubleshooting 161
- 1514131211109876543210 163
- 0000000000000000 163
- Section 9.7 165
- Error Codes 165
- Section 9.8 165
- Inhibit Function 165
- Appendix A 167
- Module Specifications 167
- 0C < Ta < 60C 168
- DEMKO 11 ATEX 1103437X 168
- IIC T4 Gc 168
- Appendix B 169
- HART Universal and Common 169
- Practice Commands 169
- Getting Technical 175
- Assistance 175
- Declaration of 175
- Conformity 175
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