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Reference Manual
00809-0100-4697, Rev GA
Appendix D: Function Blocks
November 2014
Function Blocks
If the OP_SELECT is set to a value between 1 and 8, the selection type logic is overridden and the
output value and status is set to the value and status of the input selected by OP_SELECT.
SELECTED will have the number of selected input unless the SELECT_TYPE is mid, in which case
it will take the average of the two middle values. Then SELECTED will be set to “0” if there is an
even number of inputs.
Status handling
In Auto mode, OUT reflects the value and status quality of the selected input. If the number of
inputs with Good status is less than MIN_GOOD, the output status will be Bad.
In Man mode, the OUT status high and low limits are set to indicate that the value is a constant
and the OUT status is always Good.
In the STATUS_OPTS parameter, select from the following options to control the status
handling:
Use uncertain as good
Sets the OUT status quality to Good when the selected input status is Uncertain.
Uncertain if in manual mode
The status of the Output is set to Uncertain when the mode is set to manual.
Note
The instrument must be to OOS to set the status option.
Application information
Use the ISEL function block to:
Select the maximum temperature input from eight inputs and send it to another
function block (see <HotXRef>Figure D-6)
Calculate the average temperature of the eight inputs (see <HotXRef>Figure D-7)
Use only six of the eight inputs to calculate the average temperature.
Figure D-6. Input Selector Function Block Application Example (SEL_TYPE = max)
IN1 = 126 °F
IN2 = 118 °F
IN3 = 104 °F
IN4 = 107 °F
OUT = 140 °F
To Another
Function Block
SEL_TYPE = max
Input Selector
(ISEL) Function
Block
IN5 = 112 °F
IN6 = 115 °F
IN7 = 130 °F
IN8 = 140 °F
- 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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