Emerson 5081-T instruction manual Section Foundation Fieldbus Operation, Pid

MODEL 5081-T	SECTION 8.0
	FOUNDATION FIELDBUS OPERATION

SECTION 8.0

FOUNDATION FIELDBUS OPERATION

This section covers basic transmitter operation and software functionality. For detailed descriptions of the function blocks common to all Fieldbus devices, refer to Fisher-Rosemount Fieldbus FOUNDATION Function Blocks manual, publication number 00809-001-4783.

Figure 8-1 illustrates how the pH/ORP signal is channelled through the transmitter to the control room and the FOUNDATION Fieldbus configuration device.

Function Blocks

• AI1

• AI2

• Al3

• PID

• sensor type

• engineering units

• reranging

• damping

• temperature compensation

• calibration

• diagnostics

SENSOR

FIGURE 8-1. Functional Block Diagram for the Model 5081-T-FF Conductivity Transmitter

with FOUNDATION Fieldbus.

Software Functionality. The Model 5081-T software is designed to permit remote testing and configuration of the transmitter using the Fisher-Rosemount DeltaV Fieldbus Configuration Tool, or other FOUNDATION fieldbus com- pliant host.

Transducer Block. The transducer block contains the actu- al measurement data. It includes information about sensor type, engineering units, reranging, damping, temperature compensation, calibration, and diagnostics.

Resource Block. The resource Block contains physical device information, including available memory, manufac- turer identification, type of device, and features.

FOUNDATION fieldbus Function Blocks. The Model 5081-T includes three Analog Input (AI) function blocks and one PID function block as part of its standard offering.

Analog Input. The Analog Input (AI) block processes the measurement and makes it available to other func- tion blocks. It also allows filtering, alarming, and engi- neering unit change.

PID. The PID function block combines all of the neces- sary logic to perform proportional/integral/derivative (PID) control. The block supports mode control, signal scaling and limiting, feedforward control, override tracking, alarm limit detection, and signal status propa- gation.

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