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Chapter 3 Example Applications
© National Instruments Corporation 3-9 FieldPoint FP-3000 User Manual
Set the Input Range and Thermocouple Type
1. Clickonthe
FP_TC_120_RANGE
parameter on the I/O Config tab in
the block configuration window. This parameter tells the AI block the
range of values it should expect from the FP-TC-120 module.
2. Set the parameter to
0–2048K
(degrees Kelvin).
3. Set the
FP_THERMOCOUPLE_TYPE
to the type of thermocouple you
have connected (such as
J
or
K
type thermocouple). This allows the
FP-TC-120 module to perform the necessary calculations on-board to
convert the electrical input from your thermocouple to the 0-2048
degrees Kelvin that it will send to the AI block.
Tip
The Kelvin scale covers more than all possible temperature you could measure.
It corresponds to –273.15 °C to 1775 °C.
Scale the Reading
1. You can avoid setting the
XD_SCALE
value manually if you set the
CFG_OPTS
option on the Options tab to
Automatically Adjust
XD_SCALE
. This allows the FP-3000 to copy the value from
FP_TC_120_RANGE
straight into the
XD_SCALE
parameter. Otherwise,
tell the block the range of values to expect from the transducer. Go to
the
XD_SCALE
parameter on the Scaling tab and enter the following:
XD_SCALE
EU_100 2048
EU_0 0
Units_Index K
Decimal 2
This tells the AI block to expect readings in the range of 0 to 2048 K
from the thermocouple module.
2. Determine the output scale. If you want to output the temperature in
degrees Kelvin, you can set
OUT_SCALE
tothesamevaluesas
XD_SCALE
above. If you want to change to Celsius, you can do so by
setting
OUT_SCALE
as follows:
OUT_SCALE
EU_100 1775.00
EU_0 -273.15
Units_Index °C
Decimal 2
These temperatures correspond to the Kelvin range you specified for
the
XD_SCALE
.
- FP-3000 Network Module 1
- User Manual 1
- Important Information 3
- Conventions 4
- Chapter 3 6
- Chapter 4 7
- Appendix A 8
- Appendix B 8
- Contents 10
- Appendix C 11
- Appendix G 13
- Technical Support Resources 13
- Glossary 13
- Overview 14
- Function Blocks 15
- PID Control 16
- Interoperability 17
- Scheduling Functionality 17
- HotPnP (Hot Plug and Play) 17
- OUNDATION 18
- Import Device Descriptions 19
- MountingtheFP-3000onaDINRail 21
- Figure 2-3 23
- Connecting Terminal Bases 23
- Removing I/O Modules 26
- Connect Power to the FP-3000 28
- Supplying Power for Outputs 29
- Isolation 29
- Power Connections 30
- LED Indicators 31
- FF-H1 PORT 32
- STATUS NETWORK 32
- Table 2-1 33
- Autoconfigure the FP-3000 34
- Updating the FP-3000 Firmware 35
- Example Applications 36
- Fieldbus Using FP-3000 37
- Create an FP-AI-110 Block 38
- Assign a Tag to the New Block 38
- Select the Module and Channel 38
- Set the Input Range 39
- Scale the Reading 39
- Set Up Scheduling 40
- Bring the Block Online 41
- Getting Started 42
- Taking Temperature Readings 43
- Create an FP-TC-120 Block 43
- Controlling a Heating Element 46
- Create an FP-AO-200 Block 46
- Set the Output Range 46
- Scale the Output 47
- Create a PID Block 48
- Scale the PID 49
- Tune the PID 51
- Set Alarms 52
- Block Reference 53
- Transducer Blocks 54
- Types of Function Blocks 55
- DO (Discrete Output) 56
- CDO (Complex Discrete Output) 56
- Data Types Supported 57
- Status Calculation Rules 58
- Syntax Rules 58
- Program Constructs 59
- Constants 60
- Operators 61
- Flow Control 62
- Delimiters 62
- Functions 62
- Table 4-5. Function Operators 63
- Uint32 is_bad(vs_float F) OR 63
- Uint32 is_bad(vs_discrete D) 63
- Chapter 4 Block Reference 64
- Table 4-6 67
- FieldPoint Modules 67
- PID Loop Execution Time 69
- Alarming 70
- Alarm Parameters 71
- UNACKNOWLEDGED 71
- ALARM_STATE/UPDATE_STATE 71
- TIME_STAMP 72
- Status Handling 73
- Substatus 74
- TARGET Mode 74
- ACTUAL Mode 75
- PERMITTED Mode 75
- NORMAL Mode 75
- Configuring the FP-3000 77
- Write Lock 78
- Fieldbus Parameters 79
- Table B-1 81
- Error Codes 81
- BYPASS (Scaling, Tuning) 82
- CAS_IN (Process) 82
- CAS_IN_D (Process) 82
- CHANNEL (I/O, Process) 82
- CONFIRM_TIME (Alarming) 83
- SET_FSTATE 85
- CLR_FSTATE 85
- FEATURES 85
- FEATURE_SEL 85
- FF_GAIN (Scaling, Tuning) 86
- FF_SCALE (Scaling) 86
- HI_PRI (Alarming) 89
- IN (Process, Scaling, Tuning) 89
- L_TYPE (Scaling) 90
- MAX_NOTIFY (Alarming) 92
- MEMORY_SIZE (Diagnostic) 92
- NV_CYCLE_T (Diagnostic) 93
- UNIT_INDEX 94
- OUT_SCALE 95
- SHED_RCAS 95
- ROUT_OUT (Process) 97
- SEL_TYPE (Scaling) 97
- SHED_RCAS (Mode Shedding) 98
- SHED_ROUT (Mode Shedding) 98
- SIMULATE (Option) 98
- WRITE_PRI (Alarming, Option) 102
- XD_SCALE (Scaling) 102
- XD_STATE (Process) 102
- FP-3000 Specific Parameters 103
- CFG_OPTS 104
- CHECKBACK 104
- BLOCK_ALMS_ACT 104
- BLOCK_RESET 104
- CLEAR_LOG 105
- D_IN_0–D_IN_3 105
- D_OUT_0–D_OUT_7 105
- Module in Configuration 109
- Module Okay 109
- Incorrect Module for Block 109
- HI_OUT_D 110
- INIT_STATUS 110
- LAST_BLOCK_EVENT 110
- LAST_RUN_ERROR 111
- LO_LO_OUT_D 111
- LO_OUT_D 111
- LTYPE_DOMAIN_INDEX 111
- NVM_LIFE 111
- VERSION_INFORMATION 113
- Advanced Function 114
- Block Behavior 114
- Upstream 115
- Downstream 115
- Remote Cascades 116
- Fault State and Mode Shedding 117
- Specifications 118
- Troubleshooting 119
- Appendix F Troubleshooting 120
- I/O Module Problems 121
- Common Questions 125
- TRK_IN_D.VALUE 126
- TRK_VAL.VALUE 126
- EXECUTION_TIME 126
- Hexadecimal 126
- Worldwide Support 132
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