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<Appendix 7. Link Master Functions>
A7-1
IM 01S01C01-01EN
Appendix 7. Link Master Functions
A7.1 Link Active Scheduler
A link active scheduler (LAS) is a deterministic, centralized bus scheduler that can control communications on
an H1 eldbus segment. There is only one LAS on an H1 eldbus segment.
An FVX110 supports the following LAS functions.
• PN transmission: Identies a eldbus device newly connected to the same eldbus segment. PN is short
for Probe Node.
• PT transmission: Passes a token governing the right to transmit, to a eldbus device on the same
segment. PT is short for Pass Token.
• CD transmission: Carry out a scheduled transmission to a eldbus device on the same segment. CD is
short for Compel Data.
• Time synchronization: Periodically transmits the time data to all eldbus devices on the segment and
returns the time data in response to a request from a device.
• Live list equalization: Sends the live list data to link masters on the same segment.
• LAS transfer: Transfers the right to be the LAS on the segment to another link master.
A7.2 Link Master
A link master (LM) is any device containing a link active scheduler. There must be at least one LM on a
segment. When the LAS on a segment has failed, another LM on the same segment starts working as the
LAS.
LM
Node address:
0x15
SlotTime = 5
LM
Node address:
0x16
SlotTime = 5
Node address: 0x14
SlotTime = 5
Basic device
Node address:
0xF1
Basic device
Node address:
0xF2
Basic device
Node address:
0xF3
Basic device
Node address:
0xF4
LAS
There are 3 LMs on this segment.
LM
FA0701.ai
Figure A7.1 Example of Fieldbus conguration-3 LMs on Same Segment
- Fieldbus Segment Indicator 1
- Contents 2
- 1. Introduction 8
- 1.2 Warranty 9
- 1.3 ATEX Documentation 10
- 2. Handling Cautions 11
- Protected Instrument 13
- Terminal 15
- 2.8.2 CSA Certication 17
- Location of the mark 22
- 2) Internal grounding 22
- 1) External grounding 22
- 2.8.4 IECEx Certication 23
- 3. Component Names 25
- 4. About Fieldbus 26
- 5. Installation 28
- 5.3 Wiring 29
- 5.4 Grounding 30
- 5.5 Connection of Devices 30
- 5.6 Host Setting 31
- 5.7 Bus Power ON 32
- 6. Conguration 34
- 6.2 Network Denition 35
- 6.3 Denition of Combining 36
- Function Blocks 36
- 6.4 Setting of Tags and 37
- Addresses 37
- 6.5 Communication Setting 37
- 0x1: System/network 38
- 0x1234: Function block 38
- 6.6 Block Setting 39
- 6.6.2 Trend Object 40
- 6.6.3 View Object 40
- <6. Conguration> 41
- 7.3.2 Operating mode 44
- 7.3.1 Function Outline 44
- Quality Sub-status 46
- 7.3.5 Indicator settings 47
- Figure 7.4 Sub Tag settings 48
- (switching displays) 62
- 9. In-Process Operation 64
- 9.3 Device Diagnostic 67
- Simulation Function 67
- 10. Maintenance 69
- Assembly 70
- 11. Device Information 71
- 12. Parameter Lists 74
- 12.2 LCD Transducer Block 77
- 13. General Specications 85
- 13.2 Physical Specications 86
- 13.3 Model and Sufx Codes 86
- 13.5 Optional Specications 88
- 13.6 Dimensions 89
- A1.1 Schematic Diagram of 90
- Signal Characterizer Block 90
- A1.2 Input Section 91
- FA0103.ai 92
- A1.5.1 Input Compensation 95
- A1.5.3 Backward Control 96
- Figure A2.1 Integrator Block 97
- A2.2 Input Process Section 98
- A2.3 Adder 99
- A2.4 Integrator 100
- A2.5 Output Process 101
- IM 01S01C01-01EN 102
- A2.6 Reset 103
- A2.6.2 Reset Timing 104
- A2.6.3 Reset Process 104
- Figure A3.1 IS Block 108
- A3.2 Input Section 110
- A3.2.2 MIN_GOOD Handling 111
- A3.3 Selection 112
- A3.3.2 SELECTION Handling 113
- Figure A3.5 Example (4) 114
- Figure A3.6 Example (5) 115
- Figure A3.7 Example (6) 116
- Figure A3.8 Example (7) 117
- Figure A3.9 Example (8) 118
- A3.4 Output Processing 119
- A3.4.2 OUT Processing 120
- A3.4.3 STATUS_OPTS 121
- FA0311.ai 123
- A4.2 Input Section 125
- A4.2.3 INPUT_OPTS 126
- Inputs and PV 126
- A4.3 ComputationSection 127
- A4.4 OutputSection 127
- AUTO MAN AUTO 128
- BAL_TIME 128
- Appendix 5. PID Block 132
- A5.3 Parameters of PID Block 133
- A5.4 PID Computation Details 136
- A5.5 Control Output 136
- A5.7 Control Action Bypass 137
- A5.8 Feed-forward 137
- A5.9 Block Modes 137
- A5.10 Bumpless Transfer 138
- A5.11 Setpoint Limiters 138
- Fallback (IMan) 139
- A5.15 Manual Fallback 140
- A5.16 Auto Fallback 140
- A5.17 Mode Shedding upon 140
- Computer Failure 140
- A5.18 Alarms 141
- A5.19 Example of Block 141
- Connections 141
- A5.20 View Object for PID 142
- Function Block 142
- (MAO) Block 143
- A6.2 Block Mode 144
- A6.3 Fault State 145
- A6.4 Status Transitions 146
- A6.5 Parameter list display 146
- A7.1 Link Active Scheduler 148
- A7.2 Link Master 148
- A7.3 Transfer of LAS 149
- A7.4 LM Functions 150
- A7.5 LM Parameters 151
- SCHEDULE_LIST_ 152
- CHARACTERISTICS_ 152
- A7.6 FAQs 155
- Field Device 159
- A8.7 Troubleshooting 159
- Software Download 161
- Relating to Software Download 162
- IMPORTANT 162
- (3) DOMAIN_HEADER 163
- Revision Information 164
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