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58
Reference Manual
00809-0100-4697, Rev GA
Appendix A: Reference Data
November 2014
Reference Data
A.1.8 Update time
Approximately 1.5 seconds to read all 8 inputs.
A.1.9 Humidity limits
0–99% non-condensing relative humidity
A.1.10 Turn-on time
Performance within specifications is achieved in less than 30 seconds after power is applied to
the transmitter.
A.1.11 Alarms
The AI and ISEL function blocks allow the user to configure the alarms to HI-HI, HI, LO, or LO-LO
with a variety of priority levels and hysteresis settings.
A.1.12 Backup Link Active Scheduler (LAS)
The transmitter is classified as a device link master, which means it can function as a Link Active
Scheduler (LAS) if the current link master device fails or is removed from the segment.
The host or other configuration tool is used to download the schedule for the application to the
link master device. In the absence of a primary link master, the transmitter will claim the LAS and
provide permanent control for the H1 segment.
FOUNDATION fieldbus parameters
A.2 Physical specifications
A.2.1 Mounting
The Rosemount 848T can be mounted directly onto a DIN rail or it can be ordered with an
optional junction box. When using the optional junction box, the transmitter can be mounted
onto a panel or a 2-in. pipe stand (with option code B6).
A.2.2 Entries for optional junction box
No entry
Used for custom fittings
Cable Gland
9 x M20 nickel-plated brass glands for 7.5–11.9 mm unarmored cable
Conduit
5 plugged 0.86-in. diameter holes suitable for installing
1
/2-in. NPT fittings.
Schedule Entries 20
Links 30
Virtual Communications Relationships (VCR) 20
- 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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