Fieldbus H1

mumkin pernah denger industrial bus, macamnya ada banyak : HART, AS-i, Modbus, Profibus, Fieldbus. Nah yg ter mutahir adalah Fieldbus menggunakan H1 link. Ane coba sharing untuk yg fieldbus....

What is Fieldbus?

1. A fieldbus is an all-digital, serial two-way, multi-drop communication System.
2. H1 link (31.25kbps) interconnects field equipment (Sensors, Actuators & I/O).
3. HSE (High Speed Ethernet, 100mbps) provides integration of high speedcontrollers, subsystems

    (via Linking Device) and data servers and workstation.

Integrated Architecture

1. Management Information Systems (MIS), Enterprise Resource Planning (ERP), and Human Machine  

    Interface (HMI) access the H1 Fieldbus information via the Data Servers.

H1 Benefits

More Data for Better Decision Making

1. Fieldbus allows “multiple variables” from each device to be brought into the control system for archiving,  

    trend analysis, process optimization, reporting, predictive maintenance and for asset management.
2. Fieldbus distortion-free characteristics digital communication enables improved control capability which

    can improve product yields.

Expanded View of Process & Instrument

1. Self Diagnostics and communication capabilities of microprocessor based fieldbus devices helps reduce

    downtime and improve plant safety.
2. Plant operation and Maintenance personnel can be notified and corrective actions taken quickly and

    safely.

Reduction in System Hardware

1. Standard Function Blocks is used to implement the Control Strategy.
2. Many control system functions such as AI, PID and AO can be performed by the field device through the

    use of these Standard Function Blocks.
3. Distribution of control into field devices can reduced the amount of hardware and cabinet footprint

    needed.

Sample Implementation

• 192 segments per cabinet
– Assuming using 8-segment redundant H1card
• Certified for installation in Class 1 Division 2 / Zone 2 hazardous locations
• Translates to 3,072 FF devices per System Cabinet
– It could be more when each FF device may provide up to 16 process values ( ie.Temperature

   Multiplexers)

3,072 FF devices per System Cabinet

Wiring Savings

1. The H1 fieldbus allows many devices to be connected to a single wire pair.
2. This results in less wire, fewer intrinsic safety barriers and fewer marshaling cabinets.

Summary

• Control in-the-field
– Reduced loading on DCS Controllers
• Reduced number of intrinsic safety barriers
– Only H1 card in the Marshalling
• Reduced number of Input/Output Converters
• Reduced number of Power Supplies and Cabinets.
• Reduced size of equipment Rooms.
• Remote configuration of devices.
• Increased accuracy of measurements
• Easier evolution due to standardized function blocks
• Increased sophistication and flexibility of instrumentation
• Increased uptime due to less equipment,
• better self diagnostics and remote diagnostics
• More information available for Operations.

4-20mA versus Fieldbus

1. A H1 fieldbus retains and optimizes the desired features of the 4-20mA analog system:
    - single Loop integrity.
    - a standardized physical interface to the wire.
    - a bus-powered devices on a single wire pair.
    - intrinsic safety options.

2. In addition, FOUNDATION Fieldbus enables:
    - 25 x faster communication speed compared to HART
    - increased capabilities (due to full digital communication).
    - reduced wiring and terminations (multiple device on one wire).
    - increased selection of suppliers (due to interoperability)
    - reduced control room loading (control on wire)
    - connection to HSE backbon