Emerson 848L User Manual

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L Logic Transmitter with F

OUNDATION

™

Fieldbus

www.rosemount.com

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L

Rosemount 848L Discrete Logic Temperature Transmitter with

OUNDATION Fieldbus

NOTICE

Read this manual before working with the product. For personal and system safety, and for optimum product performance, make sure to thoroughly understand the contents before installing, using, or maintaining this product.

The United States has two toll-free assistance numbers and one international number.

Customer Central

1-800-999-9307 (7:00 a.m. to 7:00 P.M. CST)

National Response Center

1-800-654-7768 (24 hours a day) Equipment service needs

International

1-(952) 906-8888

The products described in this document are NOT designed for nuclear-qualified applications.

Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate readings.

For information on Rosemount nuclear-qualified products, contact a Emerson Process Management Sales Representative.

Cover photo: 848-848C004

www.rosemount.com

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L

SECTION 1 Introduction

SECTION 2 Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Mounting to a DIN Rail Without an Enclosure. . . . . . . . . . . . . . . . . . . . . 2-2

Mounting to a Panel with a Junction Box . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Mounting to a 2-Inch Pipe Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Power Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Surges/Transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

I/O Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Transmitter Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Using Cable Glands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Using Conduit Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

SECTION 3 Configuration

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

General Block Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Link Active Scheduler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Block Instantiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Resource Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

FEATURES and FEATURES_SEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

MAX_NOTIFY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

PlantWeb

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

I/O Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Logic Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Discrete Input Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Discrete Output Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Multiple Discrete Input Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Multiple Discrete Output Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

™

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

www.rosemount.com

Rosemount 848L

Reference Manual

00809-0100-4696, Rev AA

September 2004

SECTION 4 Operation and Maintenance

APPENDIX A Reference Data

APPENDIX B Product Certifications

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Foundation Fieldbus Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Commissioning (Addressing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Hardware Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Sensor Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Communication/Power Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Resetting the Configuration (RESTART) . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Foundation Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Resource Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

I/O Transducer and Logic Block Troubleshooting . . . . . . . . . . . . . . . . . . 4-3

NAMUR Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4

Function Blocks Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-5

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-7

Approved Manufacturing Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

Hazardous Locations Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

North American Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1

European Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

APPENDIX C Function Blocks

Resource Block Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1

I/O Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-5

Logic Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-8

Discrete Input Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-9

Discrete Output Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-11

Supported Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-11

Multiple Discrete Input Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-12

Multiple Discrete Output Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-13

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Rosemount 848L

APPENDIX D Logic Equation Syntax

APPENDIX E Motor Control

APPENDIX F Valve Control

Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-4

Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-5

Introduction to Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-1

Variations on Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-2

Writing 848L Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-4

Basic Motor Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4

Interlock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5

Permissive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5

Emergency Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-5

Restart Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-6

Maximum Restarts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-7

Winding Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8

Hand-Off-Auto . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-9

Intermediate Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-10

Redundant Motors - Alternate Start . . . . . . . . . . . . . . . . . . . . . . . . . . .E-11

Redundant Motors - Timed Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-12

Redundant Motors - Switch on Failure . . . . . . . . . . . . . . . . . . . . . . . . .E-14

Introduction to Valve Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-1

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-2

Variations on Valve Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2

Boolean Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3

Basic Valve Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3

Open-Auto-Close . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4

Alarm Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4

Output Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-4

Output with Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4

Simple Valve Variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5

Permissive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5

Double Block and Bleed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6

Motorized Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7

Heat Exchange Medium Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-7

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Rosemount 848L

Reference Manual

00809-0100-4696, Rev AA

September 2004

TOC-4

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L

Section 1 Introduction

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Return of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

ensure the safety of the personnel performing the operations. Information that potentially raises safety issues is indicated by a warning symbol ( ). Please refer to the following safety messages before performing an operation preceded by this symbol.

Warnings

Failure to follow these installation guidelines could result in death or serious injury.

• Make sure only qualified personnel perform the installation.

Electrical shock could cause death or serious injury.

• If the device or senors are installed in a high voltage environment and a fault condition or installation error occurs, high voltage may be present on transmitter leads and terminals.

• Use extreme caution when making contact with the leads and terminals.

www.rosemount.com

Reference Manual

00809-0100-4696, Rev AA

Rosemount 848L

September 2004

OVERVIEW

Transmitter The 848L provides a cost effective field mounted interface for discrete inputs

and outputs on a Foundation Fieldbus H1 network. The 848L allows you to leverage the fieldbus network to reduce discrete input and output wiring and eliminate the need for a separate bus for discrete inputs and outputs. The 848L can communicate with other devices on the segment to provide logic interactions independent of any upper level controller.

The 848L also has logic capability allowing it to independently control outputs based on the state of one or more of it's inputs or discrete signals from other devices on the network. A Logic Block allows for up to 20 Boolean equations, 8 Inputs, and 4 Outputs.

Manual This manual is designed to assist in the installation, operation, and

maintenance of the Rosemount 848L Logic Transmitter.

Section 1: Introduction

• Overview

• Considerations

• Return of Materials

Section 2: Installation

• Mounting

• Installation

• Wiring

• Power Supply

• Commissioning

Section 3: Configuration

OUNDATION fieldbus Technology

•F

• Configuration

• Function Block Configuration

Section 4: Operation and Maintenance

• Hardware Maintenance

• Troubleshooting

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Rosemount 848L

Appendix A: Specification and Reference Data

• Specifications

• Dimensional Drawings

• Ordering Information

Appendix B: Product Certificates

• Hazardous Locations Certificates

• Intrinsically Safe and Non-Incendive Installations

• Installation Drawings

Appendix C: Function Blocks

• Device Descriptions

• Block Operation

Appendix D: Logic Equation Syntax

• Error Handling

• Examples

Appendix E: Motor Control

• Variations of Motor Control

• Writing 848L Equations

Appendix F: Valve Control

RETURN OF MATERIALS To expedite the return process in North America, call the Emerson Process

Management National Response Center toll-free at 800-654-7768. This center, available 24 hours a day, will assist with any needed information or materials.

The center will ask for the following information:

• Product model

• Serial numbers

• The last process material to which the product was exposed

The center will provide

• A Return Material Authorization (RMA) number

• Instructions and procedures that are necessary to return goods that were exposed to hazardous substances

For other locations, please contact an Emerson Process Management sales representative.

NOTE

If a hazardous substance is identified, a Material Safety Data Sheet (MSDS), required by law to be available to people exposed to specific hazardous substances, must be included with the returned materials.

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September 2004

1-4

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L

Section 2 Installation

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-5

Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-5

I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-7

Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-8

Transmitter Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-9

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-9

SAFETY MESSAGES Instructions and procedures in this section may require special precautions to

Warnings

Failure to follow these installation guidelines could result in death or serious injury.

• Make sure only qualified personnel perform the installation.

Electrical shock could cause death or serious injury.

• If the device or sensors are installed in a high voltage environment and a fault condition or installation error occurs, high voltage may be present on transmitter leads and terminals.

• Use extreme caution when making contact with the leads and terminals.

MOUNTING The 848L is always mounted remote from the sensors and output devices.

There are three mounting configurations:

• To a DIN rail without an enclosure

• To a panel with an enclosure

• To a 2-in pipe stand with an enclosure using a pipe mounting kit

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Rosemount 848L

Reference Manual

00809-0100-4696, Rev AA

September 2004

Mounting to a DIN Rail Without an Enclosure

Figure 2-1. Mounting the 848L to a DIN Rail

Mounting to a Panel with a Junction Box

To mount the 848L to a DIN rail without an enclosure, follow these steps:

1. Pull up the DIN rail mounting clip located on the top back side of the transmitter.

2. Hinge the DIN rail into the slots on the bottom of the transmitter.

3. Tilt the 848L and place onto the DIN rail. Release the mounting clip. The transmitter should be securely fastened to the DIN rail.

848L without

enclosure

DIN Rail Mounting Clip

DIN Rail

When inside of a plastic or aluminum junction box, the 848L mounts to a panel

using four

/4-20 x 1.25-in. screws.

When inside of a stainless steel junction box, the 848L mounts to a panel using two

/4-20 x 1/2-in. screws.

Figure 2-2. Mounting the 848L junction box to a panel

848L with aluminum or plastic box

Cover Screws (4)

Mounting Screws (4)

Panel

Aluminum/Plastic Stainless Steel

848L with a stainless steel box

Mounting Screws (2)

Panel

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Rosemount 848L

Mounting to a 2-Inch Pipe Stand

Use the optional mounting bracket (option code B6) to mount the 848L to a 2-inch pipe stand when using a junction box.

Aluminum/Plastic Junction Box

(styles JA and JP)

Front View Side View Front View Side View

5.1

(130)

10.2

(260)

Aluminum/Plastic Junction Box

Mounted on a Vertical Pipe

6.6 (167) fully

assembled

Dimensions are in inches (millimeters)

Stainless Steel Junction Box

4.5

(114)

Stainless Steel Junction Box

Mounted on a Vertical Pipe

(style JS)

7.5 (190) fully

assembled

848_848A52A, B, 53A, B

848_848A54A, 55A

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September 2004

WIRING If the device or sensors are installed in a high-voltage environment and a fault

condition or installation error occurs, the sensor leads and transmitter terminals could carry lethal voltages. Use extreme caution when making contact with the leads and terminals.

NOTE

Do not apply high voltage (e.g. AC line voltage) to the transmitter bus or I/O power terminals. Abnormally high voltage can damage the unit (bus and I/O power terminals are rated to 42.4 VDC).

Figure 2-3. 848L Transmitter Fieldbus Wiring

Integrated Power

Conditioner

and Filter

Power

Supply

6234 ft (1900 m) max

(depending upon cable

characteristics)

Terminators

(Trunk)

Power Supply Connections

FOUNDATION

fieldbus Host or

configuration tool

(Spur)

Devices 1 through 16*

(Spur)

Signal Wiring

The transmitter requires both a fieldbus connection and power for the discrete I/O channels.

Fieldbus Connection

The fieldbus connection requires between 9 and 32VDC to operate the electronics. The dc power supply should provide power with less than 2% ripple. A fieldbus segment requires a power conditioner to isolate the power supply filter and decouple the segment from other segments attached to the same power supply. Signal wiring should be shielded, twisted pair for best results in electrically noisy environments. Do not use unshielded signal wiring in open trays with power wiring or near heavy electrical equipment. Use ordinary copper wire of sufficient size to ensure that the voltage across the bus terminals does not go below 9 VDC. The power terminals are not polarity sensitive. To power the electronics and establish communications:

1. Connect the fieldbus wires to the terminals marked "Bus" as shown in Figure 2-4 on page 2-5.

2. Tighten the terminal screws to ensure adequate contact.

848-848_01A

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Figure 2-4. “Bus” location on the Rosemount 848L

Rosemount 848L

848/848L/848L_19_AA.EPS

Input/Output Power:

The discrete I/O requires a 9-32VDC power supply that is separate from the fieldbus power. The voltage level will depend on the type of sensors being used and outputs being driven. To power the I/O:

1. Connect the positive lead from the power supply to the (+) terminal marked "PWR".

2. Connect the return lead to the (-) terminal marked "PWR"

3. Tighten the terminal screws to ensure adequate contact.

Surges/Transients The transmitter will withstand electrical transients encountered through static

discharges or induced switching transients. However, a transient protection option (option code T1) is available to protect the 848L against high-energy transients. The device must be properly grounded using the ground terminal.

GROUNDING Although not required, a ground terminal is provided that can be connected to

earth ground for optimal EMC performance. A wire of 14AWG or larger is recommend using appropriate terminal connectors at both ends.

Transmitter Enclosure (optional)

Ground the transmitter in accordance with local electrical requirements.

SWITCHES

Figure 2-5. Switch Location on the Rosemount 848L

NOT USED SECURITY SIMULATE ENABLE

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Rosemount 848L

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Security

After configuring the transmitter, the data can be protected from unwarranted changes. Each 848L is equipped with a security switch that can be positioned “ON” to prevent the accidental or deliberate change of configuration data. This switch is located on the front side of the electronics module and is labeled SECURITY.

See Figure 2-5 on page 2-5 for switch location on the transmitter label. Refer to Section 3: Configuration, “SOFT WRITE LOCK and HARD WRITE LOCK” on page 3-5.

Simulate Enable

The switch labeled SIMULATE ENABLE is used in conjunction with the with the Discrete Input (DI) and Discrete Output (DO) function blocks. This switch is used to simulate input status. As a lock-out feature, the switch must transition from “OFF” to “ON” after power is applied to the transmitter. This feature prevents the transmitter from being left in simulator mode.

NOT USED

The switch labeled NOT USED is only used for product engineering and development purposes and should always remain in the “OFF” position. If the switch is turned to the “ON” position and power is applied, the 848L will not be present on the fieldbus segment.

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I/O WIRING

Rosemount 848L

DISCRETE INPUT WIRING CONFIGURATION

2-Wire NAMUR Sensors 1 of 2 Input Connectors

3-Wire NAMUR Sensors 1 of 2 Input Connectors

Dry Contact Switches

1 of 2 Input Connectors

9-32 VDC Sensors

1 of 2 Input Connectors

DISCRETE OUTPUT WIRING CONFIGURATION

9-32 VDC Outputs

848/848L/848L_10_AA, 848L_11_AA, 848L_12_AA, 848L_13_AA, 848L_14_AA.EPS

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Rosemount 848L

TAGGING Commissioning Tag

The 848L is supplied with a removable commissioning tag that contains both the Device ID (the unique code that identifies a particular device in the absence of a device tag) and a space to record the device tag (the operational identification for the device as defined by the Piping and Instrumentation Diagram (P&ID)).

When commissioning more than one device on a fieldbus segment, it can be difficult to identify which device is at a particular location. The removable tag, provided with the transmitter, can aid in this process by linking the Device ID to its physical location. The installer should note the physical location of the transmitter on both the upper and lower location of the commissioning tag. The bottom portion should be torn off for each device on the segment and used for commissioning the segment in the control system.

Figure 2-6. Commissioning Tag

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Device ID

Device Tag

to denote

physical

location

Transmitter Tag

Hardware

• tagged in accordance with customer requirements

• permanently attached to the transmitter

Software

• the transmitter can store up to 30 characters

• if no characters are specified, the first 30 characters of the hardware tag will be used

Sensor Tag

Hardware

• a plastic tag is provided to record identification of the I/O

• in the field, the tag can be removed, printed on, and reattached to the transmitter

Software

• the I/O Transducer Block provides the ability to record the I/O tags.

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Rosemount 848L

TRANSMITTER LABEL

Figure 2-7. Transmitter Label

INSTALLATION

Using Cable Glands Use the following steps to install the 848L with Cable Glands:

1. Remove the junction box cover by unscrewing the four cover screws.

2. Run the sensor and power/signal wires through the appropriate cable

glands using the pre-installed cable glands (see Figure 2-8).

3. Install the I/O wires into the correct screw terminals.

4. Install the power/signal wires onto the correct screw terminals. Bus

power is polarity insensitive, allowing the user to connect positive (+) or negative (–) to either Fieldbus wiring terminal labeled “Bus.” I/O power is polarity sensitive and must be connected correctly to avoid damage to the transmitter. See Figure 2-4 on page 2-5.

5. Replace the enclosure cover and securely tighten all cover screws.

848/848_21_AA.EPS

Figure 2-8. Installing the 848L with Cable Glands

Enclosure Cover Screw (4)

Cable Gland

I /O

Power/Signal

848_848A19A

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Using Conduit Entries Use the following steps to install the 848L with Conduit Entries:

1. Remove the junction box cover by unscrewing the four cover screws.

2. Remove the five conduit plugs and install five conduit fittings

(supplied by the installer).

3. Run sensor and output wires through each conduit fitting.

4. Install the I/O wires into the correct screw terminals.

5. Install the power/signal wires into the correct screw terminals. Bus

6. Replace the junction box cover and securely tighten all cover screws.

Figure 2-9. Installing the 848L with Conduit Entries

I /O

Enclosure

Cover Screw

Power/Signal Conduit

848_848A09A

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Rosemount 848L

Section 3 Configuration

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1

Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1

General Block Information . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2

Resource Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-4

I/O Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-9

Logic Transducer Block . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-10

Discrete Input Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-20

Discrete Output Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-21

Multiple Discrete Input Block . . . . . . . . . . . . . . . . . . . . . . page 3-21

Multiple Discrete Output Block . . . . . . . . . . . . . . . . . . . . . page 3-21

OVERVIEW This section covers basic operation, software functionality, and basic

configuration procedures for the Rosemount 848L transmitter with F

OUNDATION fieldbus. This section is organized by block information. For

detailed information about the function blocks used in the Rosemount 848L logic transmitter, refer to “Foundation Fieldbus Block Information” on page A-1 and the Foundation Fieldbus Function Block manual (00809-0100-4783).

SAFETY MESSAGES Procedures and instructions in this section may require special precautions to

ensure the safety of the personnel performing the operations. Information that raises potential safety issues is indicated by a warning symbol ( ). Refer to the following safety messages before performing an operation preceded by this symbol.

Warnings

Explosions can result in death or serious injury.

Before connecting a configuration tool in an explosive atmosphere, make sure the instruments in the loop are installed in accordance with nonincendive field wiring practices.

Electrical shock can result in death or serious injury.

• Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock.

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September 2004

GENERAL BLOCK INFORMATION

Modes The Resource, Transducer, and all function blocks in the device have modes

of operation. These modes govern the operation of the block. Every block supports both automatic (AUTO) and out of service (OOS) modes. Other modes may also be supported.

Changing Modes

To change the operating mode, set the MODE_BLK.TARGET to the desired mode. After a short delay, the parameter MODE_BLOCK.ACTUAL should reflect the mode change if the block is operating properly.

Permitted Modes

It is possible to prevent unauthorized changes to the operating mode of a block. To do this, configure MODE_BLOCK.PERMITTED to allow only the desired operating modes. It is recommended to always select OOS as one of the permitted modes.

Types of Modes

For the procedures described in this manual, it will be helpful to understand the following modes:

AUTO

The functions performed by the block will execute. If the block has any outputs, these will continue to update. This is typically the normal operating mode.

Out of Service (OOS)

The functions performed by the block will not execute. If the block has any outputs, these will typically not update and the status of any values passed to downstream blocks will be “BAD”. To make some changes to the configuration of the block, change the mode of the block to OOS. When the changes are complete, change the mode back to AUTO.

MAN

In this mode, variables that are passed out of the block can be manually set for testing or override purposes.

Other Types of Modes

Other types of modes are Cas, RCas, ROut, IMan and LO. Some of these may be supported by different function blocks in the Rosemount 848L. For more information, see the Function Block manual, document 00809-0100-4783.

NOTE

When an upstream block is set to OOS, this will impact the output status of all downstream blocks. The figure below depicts the hierarchy of blocks:

3-2

Resource

Block

Transducer

Block

Discrete Input

(DI Block)

Other

function

blocks

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Rosemount 848L

Link Active Scheduler The Rosemount 848L can be designated to act as the backup Link Active

Scheduler (LAS) in the event that the LAS is disconnected from the segment. As the backup LAS, the Rosemount 848L will take over the management of communications until the host is restored.

The host system may provide a configuration tool specifically designed to designate a particular device as a backup LAS. Otherwise, this can be configured manually as follows:

1. Access the Management Information Base (MIB) for the Rosemount 848L.

2. To activate the LAS capability, write 0x02 to the BOOT_OPERAT_FUNCTIONAL_CLASS object (Index 605). To deactivate, write 0x01.

3. Restart the processor.

Block Instantiation Rosemount devices are pre-configured with function blocks at the factory, the

default permanent configuration for the Rosemount 848L is listed below. The Rosemount 848L can have one additional instantiated function block.

• 8 Discrete Input Blocks

• 4 Discrete Output Blocks

• Multiple Discrete Input Block

• Multiple Discrete Output Block

The Rosemount 848L supports the use of Function Block Instantiation. When a device supports block instantiation, the number of blocks and block types can be defined to match specific application needs.The number of blocks that can be instantiated is only limited by the amount of memory within the device and the block types that are supported by the device. Instantiation does not apply to standard device blocks like the Resource, I/O Transducer, and Logic Transducer Block.

Block instantiation is done by the host control system or configuration tool, but not all hosts are required to implement this functionality. Please refer to your specific host or configuration tool manual for more information.

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Rosemount 848L

Capabilities Virtual Communication Relationship (VCRs)

There are a total of 20 VCRs. Two are permanent and 18 are fully configurable by the host system. 25 link objects are available.

Network Parameter Value

Slot Time 8 Maximum Response Delay 4 Maximum Inactivity to Claim LAS Delay 60 Minimum Inter DLPDU Delay 7 Time Sync class 4 (1ms) Maximum Scheduling Overhead 21 Per DLPDU PhL Overhead 4 Maximum Inter-channel Signal Skew 0 Required Number of Post-transmission-gap-ext Units 0 Required Number of Preamble-extension Units 1

Host timer recommendations

T1 = 96000 T2 = 1920000 T3 = 480000

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RESOURCE BLOCK

FEATURES and FEATURES_SEL

Block Execution times

Discrete Input = 40 ms Discrete Output = 40 ms Multiple Discrete Input = 40 ms Multiple Discrete Output = 40 ms

The parameters FEATURES and FEATURE_SEL determine optional behavior of the Rosemount 848L.

FEATURES

The FEATURES parameter is read only and defines which features are supported by the Rosemount 848L. Below is a list of the FEATURES the Rosemount 848L supports.

UNICODE

All configurable string variables in the Rosemount 848L, except tag names, are octet strings. Either ASCII or Unicode may be used. If the configuration device is generating Unicode octet strings, you must set the Unicode option bit.

REPORTS

The Rosemount 848L supports alert reports. The Reports option bit must be set in the features bit string to use this feature. If it is not set, the host must poll for alerts.

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Rosemount 848L

SOFT WRITE LOCK and HARD WRITE LOCK

Inputs to the security and write lock functions include the hardware security switch, the hardware and software write lock bits of the FEATURE_SEL parameter, the WRITE_LOCK parameter, and the DEFINE_WRITE_LOCK parameter.

The WRITE_LOCK parameter prevents modification of parameters within the device except to clear the WRITE_LOCK parameter. During this time, the block will function normally updating inputs and outputs and executing algorithms. When the WRITE_LOCK condition is cleared, a WRITE_ALM alert is generated with a priority that corresponds to the WRITE_PRI parameter.

The FEATURE_SEL parameter enables the user to select a hardware or software write lock or no write lock capability. To enable the hardware security function, enable the HW_SEL bit in the FEATURE_SEL parameter. When this bit has been enabled the WRITE_LOCK parameter becomes read only and will reflect the state of the hardware switch. In order to enable the software write lock, the SW_SEL bit must be set in the FEATURE_SEL parameter. Once this bit is set, the WRITE_LOCK parameter may be set to “Locked” or “Not Locked.” Once the WRITE_LOCK parameter is set to “Locked” by either the software or the hardware lock, all user requested writes as determined by the DEFINE_WRITE_LOCK parameter shall be rejected.

The DEFINE_WRITE_LOCK parameter allows the user to configure whether the write lock functions (both software and hardware) will control writing to all blocks, or only to the resource and transducer blocks. Internally updated data such as process variables and diagnostics will not be restricted by the security switch.

The following table displays all possible configurations of the WRITE_LOCK parameter.

FEATURE_SEL HW_SEL bit

0 (off) 0 (off) NA 1 (unlocked) Read only NA All 0 (off) 1 (on) NA 1 (unlocked) Read/Write NA All 0 (off) 1 (on) NA 2 (locked) Read/Write Physical Function

0 (off) 1 (on) NA 2 (locked) Read/Write Everything None 1 (on) 0 (off) 1 (on) 0 (off) 1 (locked) 2 (locked) Read only Physical Function

1 (on) 0 (off) 1 (locked) 2 (locked) Read only Everything None

(1) The hardware and software write lock select bits are mutually exclusive and the hardware select has the highest priority. When the HW_SEL bit if set to 1

(on), the SW_SEL bit is automatically set to 0 (off) and is read only.

FEATURE_SEL SW_SEL bit

(1)

WRITE_LOCK

SECURITY SWITCH WRITE_LOCK

0 (unlocked) 1 (unlocked) Read only NA All

Read/Write

DEFINE_WRITE_LOCK

Write access to blocks

Blocks only

FEATURE_SEL

FEATURE_SEL is used to turn on any of the supported features. The default setting of the Rosemount 848L does not select any of these features. Choose one of the supported features if any.

MAX_NOTIFY The MAX_NOTIFY parameter value is the maximum number of alert reports

that the resource can have sent without getting a confirmation, corresponding to the amount of buffer space available for alert messages. The number can be set lower, to control alert flooding, by adjusting the LIM_NOTIFY parameter value. If LIM_NOTIFY is set to zero, then no alerts are reported.

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PlantWeb™ Alarms The Resource Block will act as a coordinator for PlantWeb alarms. There will

be three alarm parameters (FAILED_ALARM, MAINT_ALARM, and ADVISE_ALARM) which will contain information regarding some of the device errors which are detected by the transmitter software. There will be a RECOMMENDED_ACTION parameter which will be used to display the recommended action text for the highest priority alarm. FAILED_ALARM will have the highest priority followed by MAINT_ALARM and ADVISE_ALARM will be the lowest priority.

FAILED_ALARMS

A failure alarm indicates a failure within a device that will make the device or some part of the device non-operational. This implies that the device is in need of repair and must be fixed immediately. There are five parameters associated with FAILED_ALARMS specifically, they are described below.

FAILED_ENABLED

This parameter contains a list of failures in the device which makes the device non-operational that will cause an alarm to be sent. Below is a list of the failures with the highest priority first.

1. Electronics Failure

2. NV Memory Failure

3. No I/O Power

4. Primary Value Failure

5. Secondary Value Failure

FAILED_MASK

This parameter will mask any of the failed conditions listed in FAILED_ENABLED. A bit on means that the condition is masked out from alarming and will not be reported.

FAILED_PRI

Designates the alarming priority of the FAILED_ALM. The default is 0 and the recommended value is between 8 and 15.

FAILED_ACTIVE

This parameter displays which of the alarms is active. Only the alarm with the highest priority will be displayed. This priority is not the same as the FAILED_PRI parameter described above. This priority is not user configurable.

FAILED_ALM

Alarm indicating a failure within a device which makes the device non-operational.

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MAINT_ALARMS

A maintenance alarm indicates the device or some part of the device needs maintenance soon. If the condition is ignored, the device will eventually fail. There are five parameters associated with MAINT_ALARMS, they are described below.

MAINT_ENABLED

The MAINT_ENABLED parameter contains a list of conditions indicating the device or some part of the device needs maintenance soon. If the condition is ignored, the device will eventually fail.

Below is a list of the conditions with the highest priority first.

1. Secondary Value Degraded

2. Configuration Error

MAINT_MASK

The MAINT_MASK parameter will mask any of the failed conditions listed in MAINT_ENABLED. A bit on means that the condition is masked out from alarming and will not be reported.

MAINT_PRI

MAINT_PRI designates the alarming priority of the MAINT_ALM. The default is 0 and the recommended value is 3 to 7.

MAINT_ACTIVE

The MAINT_ACTIVE parameter displays which of the alarms is active. Only the condition with the highest priority will be displayed. This priority is not the same as the MAINT_PRI parameter described above. This priority is not user configurable.

MAINT_ALM

An alarm indicating the device needs maintenance soon. If the condition is ignored, the device will eventually fail.

Advisory Alarms

An advisory alarm indicates informative conditions that do not have a direct impact on the device's primary functions There are five parameters associated with ADVISE_ALARMS, they are described below.

ADVISE_ENABLED

The ADVISE_ENABLED parameter contains a list of informative conditions that do not have a direct impact on the device's primary functions. Below is a list of the advisories with the highest priority first.

1. Prescaler Overflow

2. NV Write Deferred

3. PWA Simulate Active

ADVISE_MASK

The ADVISE_MASK parameter will mask any of the failed conditions listed in ADVISE_ENABLED. A bit on means the condition is masked out from alarming and will not be reported.

ADVISE_PRI

ADVISE_PRI designates the alarming priority of the ADVISE_ALM. The default is 0 and the recommended value is 1 or 2.

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Table 3-1. RB.RECOMMENDED_ATION

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ADVISE_ACTIVE

The ADVISE_ACTIVE parameter displays which of the advisories is active. Only the advisory with the highest priority will be displayed. This priority is not the same as the ADVISE_PRI parameter described above. This priority is not user configurable.

ADVISE_ALM

ADVISE_ALM is an alarm indicating advisory alarms. These conditions do not have a direct impact on the process or device integrity.

Recommended Actions for PlantWeb Alarms

RECOMMENDED_ACTION

The RECOMMENDED_ACTION parameter displays a text string that will give a recommended course of action to take based on which type and which specific event of the PlantWeb alarms is active.

Alarm Type

NONE None No action required

ADVISORY

MAINTENANCE

FAILED

Failed/Maint/Advise Active Event

Prescaler Overflow Check the Divisor parameter of all PS function

NV Write Deferred Reduce the frequency in which applications

PWA Simulate Active Disable PWA_SIMULATE parameter in the

Secondary Value Degraded

Configuration Error Verify that the Logic equations are correct in

Electronics Failure Replace the electronics NV Memory Failure Replace the electronics No I/O Power Check the IO Power supply, polarity, wiring,

Primary Value Failure Check the sensor, configuration, wiring, and

Secondary Value Failure

Recommended Action Text String

calls in the logic equations

write to NV Memory

Resource Block Ensure that the transmitter is not too close to

extreme hot or cold environments

the Logic transducer block

and connections.

connection for open or shorted sensors. Verify that the body temperature is within the

operating limits of this device.

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Alarms Use the following steps to configure the alarms, which are located in the

Resource Block.

1. Set the resource block to OOS.

2. Set WRITE_PRI to the appropriate alarm level (WRITE_PRI has a selectable range of priorities from 0 to 15. Set the other block alarm parameters at this time.

3. Set CONFIRM_TIME to the time, in device will wait for confirmation of receiving a report before trying again (the device does not retry if CONFIRM_TIME is 0).

4. Set LIM_NOTIFY to a value between zero and MAX_NOTIFY. LIM_NOTIFY is the maximum number of alert reports allowed before the operator needs to acknowledge an alarm condition.

5. Enable the reports bit in FEATURE_SEL.

6. Set the resource block to AUTO.

/32 of a millisecond, that the

I/O TRANSDUCER BLOCK

The 848L is ordered with either Dry Contact, VDC or NAMUR Inputs. Each input can have a filter which determines the minimum time a contact needs to be at a given state to be acknowledged as a state change.

The following procedure allows the sensors to be configured:

1. Set MODE_BLK.TARGET to OOS

2. For each Input “n” select the parameter IN_n_CONFIG.FILTER a. Select the desired filter time in the range of 0 to 128msec

3. Set MODE_BLK.TARGET to AUTO

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The 848L can force the outputs to a predetermined state in the event of a device malfunction.

The following procedure can be used to set the fail safe condition for each

output:

1. Set MODE_BLK.TARGET to OOS

2. For each Output "n" select the parameter OUT_n_CONFIG.FAIL_SAFE

3. Select False, True or Last Good Value

4. Set MODE_BLK.TARGET to AUTO

Latching

Most often the inputs are scanned and the logic equations processed at a rate greater than the macrocycle frequency. To be certain that positive or negative transitions are communicated, the inputs, equation results, and output values can be latched until read by the function blocks.

The following procedure is used to set the latching state of each input, equation or output:

LOGIC TRANSDUCER BLOCK

1. Set MODE_BLK.TARGET to OOS

2. Select the appropriate parameter for either inputs, equations, or outputs:

a. Inputs use parameter MACRO_IN_LATCH

b. Outputs use parameter MACRO_OUT_LATCH

c. Equations use parameter MACRO_EQ_LATCH

For each input, output or equation select either "Latch Positive Pulses" or "Latch Negative Pulses" or “disabled”.

Logic Equations

The 848L provides for 16 Logic Equations and 4 Output Equations. The Output Equations drive the hardware outputs. Each logic equation consists of up to 80 characters with a semicolon as the last character. The equations are evaluated at a nominal rate of 100msec. However this will vary based on the number and complexity of the equations used. The logic block consists of variables that are connected to the hardware I/O, obtain values or send values over the bus and internally calculated variables as shown in Figure 3-1.

The value or state of the logic block variables can be communicated on the bus by assigning the appropriate channel number of a DI or MDI block. The DO variables can be set externally by assigning the appropriate channel number in a DO or MDO function block. The DO function blocks do not drive the outputs directly. The DO function block can drive the output by referencing the appropriate DO variable in the output equations.

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Emerson 848L User Manual

Table of Contents

Section 1 Introduction

Section 2 Installation

Section 3 Configuration