National-instruments FP-3000 Manual de usuario descargar pdf (Pagina 15)

Chapter 1 FP-3000 Network Module Overview

FieldPoint FP-3000 User Manual 1-2 www.ni.com

each 4–20 mA device to your controller, you can mount an FP-3000

network module in the field and run a single pair of wires (called the trunk)

from your PC to the FP-3000. You connect the 4–20 mA devices to the

FieldPoint I/O modules by short stretches of wire. The following figure

shows an FP-3000 connected to a Fieldbus network.

Note

You can also create your own terminators and connectors as described in the

FOUNDATION

Fieldbus Overview document.

The FP-3000 is National Instruments’ primary field device for F

OUNDATION

Fieldbus. It has an onboard processor that allows it to execute function

blocks. The FP-3000 implements F

OUNDATION

Fieldbus-compliant

Resource, AI, AO, DI, DO, and PID blocks. It also supports additional

National Instruments defined blocks, LOG, STAT, and EXPR.

Features of the FP-3000 Network Module

Function Blocks

Conventional devices connected to I/O modules are made visible as

Fieldbus function blocks. Function blocks are software modules which

describe the fundamental elements of an I/O or control system. The

FP-3000, like any F

OUNDATION

Fieldbus–compliant device, has one or more

function blocks. The function blocks in different devices can be connected

1 FP-3000 Network

Module

2 Terminal Base

3 I/O Module

4 Fieldbus Trunk

5 Relcom power hub

6 To Fieldbus

7 Power supply

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 154 155

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National-instruments FP-3000 Manual de usuario Pagina 15