Rockwell-automation 1788-FFCT NI-FBUS Configurator User Manual Manual de usuario descargar pdf (Pagina 14)

Publication 1788-UM052B-EN-P - April 2002

1-6 Fieldbus Overview

Loops

A loop or control loop is a group of function blocks connected by

linkages executing at a configured rate. Each block executes at the

configured rate and data moves across the linkages between the

blocks at the configured rate. Figure 1.5 shows an example of a

control loop.

Figure 1.5 Control Loop

Multiple Loops

It is possible to have multiple loops running at different rates on a

link. Figure 1.6 shows an example of multiple loops.

Figure 1.6 Multiple Loops Running At Different Rates

Loop = 1 sec

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NI-FBUS 1
Configurator 1
Important User Information 3
Rockwell Automation 4
Table of Contents 5
Conventions Used in This 7
Related Documentation 7
Preface x 8
Fieldbus Overview 9
1-2 Fieldbus Overview 10
Identifying Devices 11
Blocks and Parameters 12
Linkages 13
Multiple Loops 14
Fieldbus Overview 1-7 15
Schedules 16
Configuring a Fieldbus System 17
NI-FBUS Configurator Overview 21
NI-FBUS Configurator 22
Project Window 23
Conventions 24
State Icons 25
Help Window 27
Status Window 27
Download Tab 28
Errors Tab 28
Starting the NI-FBUS 29
Configuring Online 30
Importing 32
Device Description Files 32
Setting Device or Block 33
Setting Device Addresses 34
Resetting a Device 36
Formulating a Control 36
Strategy 36
Function Blocks 38
Adding Function Blocks 38
Connecting Blocks 40
Using Pre-Wired Templates 41
Figure 4.7 Example Template 42
Defining Multiple Loops 43
Figure 4.10 Loop Structure 45
Viewing and Editing 47
Function Block Parameters 47
Block Window Icons 48
Block Window Toolbar 48
Tabs of the Block Window 49
Adding Tabs 50
Removing Tabs 50
Customizing Parameters 50
Editing Block Parameters 51
Manually 52
Automatically 52
Using Menus and Methods 53
Configuring Alarms 53
Configuring Trends 54
Viewing and Editing a 55
Schedule 55
Schedule Window Toolbar 56
Multiple Loop Representation 57
Setting Network 58
Parameters 58
Downloading a 59
Configuration 59
Monitoring a 60
Function Block Application 60
Verifying a Configuration 61
Comparing Two Configurations 62
Viewing and Editing a Log 63
Replacing Devices 63
Setting Preferences 64
Changing the Software Key 65
Printing 66
Error Messages and Warnings 67
Warnings 70
Appendix 71
Troubleshooting 72
Device Problems 73
Mode Transition 74
Reading and Writing Errors 75
Common Questions 76
Glossary 77
OUNDATION Fieldbus 78
I-2 80
I-4 82
How Are We Doing? 83
BUSINESS REPLY MAIL 84

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