The document outlines the benefits and features of fieldbus communication standards, including improved integrity, reduced wiring, and enhanced capabilities through digital communication. It details the structure of fieldbus systems, including signal types, function blocks, and scheduling methods, along with their applications in device communication. Additionally, it discusses wiring and installation considerations, especially regarding intrinsic safety parameters in hazardous areas.

1. FIELDBUS
Communication Standard

2. Fieldbus Communication:

3. Fieldbus Benefits:

4. Fieldbus Benefits:

5. Fieldbus: Benefits
 Single loop integrity
 Standardized physical interface to the wire
 Bus-powered devices on a single wire pair
 Intrinsic safety options
 Increased capabilities due to full digital communications
 Reduced wiring and wire terminations
 Interoperability
 Reduced loading on control room equipment due to
 distribution of control
 Input/output functions to field devices

6. Fieldbus: Signals
 Manchester coded baseband signal
Logical “0” Logical “1”
32 uSec
Transition at 16 uSec
Freq of transmission: 31.25 kHz

7. Fieldbus: Manchester Signals

8. Fieldbus: Closed Loop

9. Fieldbus: Macrocycle
 Macrocycle: Single iteration of schedule within device.
Typical Macrocycle time: 250 ms, 500 ms, 1 sec, 2 sec, and 5 sec.

10. Fieldbus: Link Active Scheduler
 Data Link Layer (DLL), controls transmission of messages
onto the fieldbus.
 The DLL manages access to the fieldbus through a
deterministic centralized bus scheduler called the Link
Active Scheduler (LAS).

11. Fieldbus: Blocks and Objects
 Resource Blocks
 Function Blocks
 Transducer Blocks
 Link Objects
 Trend Objects
 Alert Objects
 Multivariable container
 View Objects

12. Fieldbus: Function Blocks
 Function Blocks Part 1
 Analog Input
 Analog Output
 Bias/Gain BG
 Control Selector
 Discrete Input
 Discrete Output
 Manual Loader
 Proportional/Derivative
 Proportional/Integral/Derivative PID
 Ratio

13. Fieldbus: Function Blocks
 Function Blocks Part 2
 Device Control
 Output Splitter
 Signal Characterizer
 Lead Lag
 Dead time
 Integrator (Totalizer)
 Setpoint Ramp Generator
 Input Selector
 Arithmetic
 Timer
 Analog Alarm

14. Fieldbus: Function Block Linking

15. Fieldbus: View Objects
VIEW 1 - Operation Dynamic
VIEW 2 - Operation Static
VIEW3 - All Dynamic - Detailed
display
VIEW 4 -Configuration and
maintenance info.

16. Fieldbus: Device Definition

17. DLL: Scheduled Communication

18. DLL: Unscheduled Communication

19. FAS: Virtual Communication Relationship
 Client Server VCRs:
 queued, unscheduled, user initiated, one to one
communication
 Used for Setpoint changes, tuning parameters, Alarm
ACK, device upload or download.
 Report Distribution VCRs:
 Alarm Reports
 Trend Reports

20. FAS: Virtual Communication Relationship
 Publisher/Subscriber VCR Type
 Buffered, one-to-many communications.
 Devices that wish to receive the Published message are
called “Subscribers.”
 High Speed communication between devices.
 Highest priority

21. Summary of VCRs:

22. Fieldbus: Wiring and Installation

23. Fieldbus: Wiring and Installation

24. Fieldbus: Wiring and Installation

25. FISCO parameters
FISCO: Fieldbus Intrinsic Safety COncept

26. Entity / FISCO/ FNICO / High Power Trunk wirings
Fieldbus
Control
System
Non-IS
(Repeater )
power
supply
Barrier
Fieldbus
Control
System
Spur-1
Spur-n
.
.
.
Maximum devices
in the segment
4 In IIC as well as IIB
Fieldbus
Control
System
FISCO/FNICO
(Repeater )
power
supply
Fieldbus
junction
box
Spur-1
Spur-n
.
.
.
Maximum devices
in the segment
6/9 in IIC
13/16 in IIB
Fieldbus
Control
System
Non-IS
(Repeater )
power
supply
Fieldbus
junction
Box with
barriers
Spur-1
Spur-n
.
.
.
Maximum devices
in the segment
>25
Safe area
Hazardous area
IS trunk
as well as
spurs
Ex e
trunk
IS Spurs

27.  Thank you