Emerson OCX 8800 Instruction Manual download pdf (Page 101)

Instruction Manual

IM-106-880, Rev 2.0

October 2009

OCX 8800

http://www..raihome.com

Section 7 Foundation Fieldbus

Foundation Fieldbus Technology . . . . . . . . . . . . . . . . . . . page 7-1

Resource Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7-6

Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7-13

Analog Input (AI) Function Block . . . . . . . . . . . . . . . . . . . page 7-23

Proportional/ Integral/Derivative (PID) Function Block . . page 7-35

Arithmetic (ARTHM) Function Block . . . . . . . . . . . . . . . . . page 7-51

Input Selector (ISEL) Function Block . . . . . . . . . . . . . . . . page 7-57

Operation with Emerson Process Management DeltaV . page 7-62

FOUNDATION FIELDBUS

TECHNOLOGY

Overview FOUNDATION Fieldbus is an all digital, serial, two-way communication system

that interconnects field equipment such as sensors, actuators, and

controllers. Fieldbus is a Local Area Network (LAN) for instruments used in

both process and manufacturing automation with built-in capacity to distribute

the control application across the network. It has the ability to distribute

control among intelligent field devices on the plant floor and digitally

communicate that information at high speed that makes F

OUNDATION

Fieldbus an enabling technology.

EMERSON offers a full range of products from field devices to the DeltaV

scalable control system to allow an easy transition to Fieldbus technology.

The Fieldbus retains the features of the 4-20 mA analog system, including

standardized physical interface to the wire, bus powered devices on a single

wire, and intrinsic safety options, and enables additional capabilities such as:

• Increased capabilities due to full digital communications.

• Reduced wiring and wire terminations due to multiple devices on one

set of wires.

• Increased selection of suppliers due to interoperability.

• Reduced loading on control room equipment with the distribution of

some control and input/output functions to field devices.

• Speed options for process control and manufacturing applications.

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Emerson OCX 8800 Instruction Manual Page 101