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Reference Manual
00809-0100-4697, Rev GA
Appendix D: Function Blocks
November 2014
Function Blocks
D.2 Multiple analog input (MAI) function block
The MAI function block has the ability to process up to eight field device measurements and
make them available to other function blocks. The output values from the MAI block are in
engineering units and contain a status indicating the quality of the measurement. The
measuring device may have several measurements or derived values available in different
channels. Use the channel numbers to define the variables that the MAI block processes.
The MAI block supports signal scaling, signal filtering, signal status calculation, mode control,
and simulation. In Automatic mode, the block’s output parameters (OUT_1 to OUT_8) reflects
the process variable (PV) values and status. In Manual mode, OUT may be set manually. The
Manual mode is reflected on the output status. Tab le D -4 lists the MAI block parameters and
their units of measure, descriptions, and index numbers. The block execution time is 30 ms.
Out1 = The block output value and status for the first channel.
Table D-4. Multiple Analog Input Function Block Parameters
Number Parameter Units Description
1 ST_REV None The revision level of the static data associated with the
input selector block. The revision value will be
incremented each time a static parameter value in the
block is changed.
2 TAG_DESC None The user description of the intended application of the
block.
3 STRATEGY None The strategy field can be used to identify grouping of
blocks. This data is not checked or processed by the
block.
4 ALERT_KEY None The identification number of the plant unit. This
information may be used in the host for sorting alarms,
etc.
5 MODE_BLK None The actual, target, permitted, and normal modes of the
block.
Actual: The mode the “block is currently in”
Target: The mode to “go to”
Permitted: Allowed modes that target may take on
Normal: Most common mode for target
6 BLOCK_ERR None This parameter reflects the error status associated with
the hardware or software components associated with a
block. It is a bit string, so that multiple errors may be
shown.
OUT_1
MAI
OUT_2
OUT_3
OUT_4
OUT_5
OUT_6
OUT_7
OUT_8
- Transmitter with FOUNDATION 1
- fieldbus 1
- Transmitter with F 3
- Title Page 4
- 1Section 1: Introduction 5
- 2Section 2: Installation 5
- 3Section 3: Configuration 5
- AAppendix A: Reference Data 6
- DAppendix D: Function Blocks 8
- Section 1 Introduction 9
- 00809-0100-4697, Rev GA 10
- November 2014 10
- OUNDATION fieldbus Technology 10
- 1.3 Service support 11
- Section 1: Introduction 12
- Introduction 12
- Section 2 Installation 13
- 2-in. screws 14
- 2.3 Wiring 16
- RTD or ohm inputs 17
- Analog inputs 17
- 2.4 Grounding 19
- Shielded wire 20
- Grounded thermocouple inputs 21
- Analog device inputs 21
- 2.5 Switches 22
- 2.6 Tagging 22
- Transmitter tag 23
- Sensor tag 23
- 2.7 Installation 24
- 2.7.2 Using conduit entries 25
- Section 2: Installation 26
- Section 3 Configuration 27
- 3.2 Configuration 28
- 3.2.5 Alarms 29
- 3.2.6 Damping 29
- Typical profiling application 31
- OUNDATION fieldbus 33
- Section 3: Configuration 34
- Number Parameter Description 34
- OUNDATION 35
- How to use PlantWeb Alarm 39
- 3.4.3 PlantWeb alerts 40
- MAINT_ALARMS 41
- Advisory alarms 42
- RECOMMENDED_ACTION 43
- FD failed alarms 44
- Configuration 45
- FD CHECK ALARMS 47
- 3.4.7 Transducer blocks 49
- Transducer block errors 50
- Transducer block modes 50
- Automatic (Auto) 51
- Out of Service (OOS) 51
- 4.4.2 Resource block 64
- Appendix A Reference Data 65
- OUNDATION fieldbus parameters 66
- A.3 Function blocks 67
- A.4.1 Stability 68
- A.4.2 Self calibration 68
- A.4.3 Vibration effect 68
- A.4.5 Accuracy 68
- A.4.8 Analog sensors 4–20mA 69
- Reference Data 70
- Examples 71
- A.5 Dimensional drawings 72
- A.5.1 Mounting options 74
- A.6 Ordering information 75
- Approvals 77
- B.3.2 Canada 78
- B.4 Europe 79
- B.5 International 81
- B.5.1 Brazil 83
- B.5.2 China 84
- B.5.3 Japan 86
- B.6 Combinations 87
- B.8 Additional Certifications 88
- B.10 Installation drawings 90
- Product Certificates 91
- Appendix C FOUNDATION 99
- Technology 99
- C.3 Device descriptions 100
- C.4 Block operation 101
- C.5 Network communication 101
- C.5.1 LAS 102
- C.5.2 Addressing 103
- C.5.3 Scheduled transfers 104
- C.5.4 Unscheduled transfers 105
- OUNDATION Fieldbus Technology 106
- Appendix D Function Blocks 107
- Reference Manual 108
- Appendix D: Function Blocks 108
- Table 3-5 on page 11 108
- D.1.1 Functionality 110
- Filtering 111
- Signal conversion 111
- Indirect 111
- Indirect square root 112
- Block errors 112
- Alarm detection 113
- Status handling 114
- Advanced features 114
- Application information 114
- D.2.1 Functionality 118
- D.3.1 Functionality 125
- Block execution 127
- AVG_USE = 6 129
- Numerics 131
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