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Emerson 848T COMMON CONFIGURATIONS FOR HIGH DENSITY APPLICATIONS

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Download 114 pages, 1.85 Mb

Reference Manual

00809-0100-4697, Rev EA

October 2011

Rosemount 848T

3-4

6. Set the Deadband from 0 to 90%. This threshold is used to clear the

PV status.

7. Set Status Priority. This determines what happens when the specific

limit has been exceeded. No Alert - Ignores limit settings. Advisory -

Sets Advisory Plant Web Alert, but does not do anything with PV

status. Warning - Sets a Maintena nce Plant Web Alert and sets PV

status to uncertain. Failure - Sets A Failure Plant Web Alert and sets

PV status to Bad.

8. Set mode to Enabled for specific sensor.

COMMON

CONFIGURATIONS FOR

HIGH DENSITY

APPLICATIONS

For the application to work properly, configure the links between the fu nction

blocks and schedule the order of their execution. The Graphical User

Interface (GUI) provid ed by the FOUNDATION fieldbus host or configuration tool

will allow easy configuration.

The measurement strategies shown in this section represent some of the

common types of configurations available in the 848T. Although the

appearance of the GUI screens will vary from host to host, the configuration

logic is the same.

NOTE

Please ensure that the ho st system or configuration tool is properly configured

before downloading the transmitter configuratio n. If configured improperly, the

FOUNDATION fieldbus host or configuration tool could overwrite the default

transmitter configuration.

Typical Profiling Application

Example: Distillation column temperature profile where all channels have the

same sensor units (°C, °F, etc.).

1. Place the Multiple Analog Input (MAI) function block in OOS mode

(set MODE_BLK.TARGET to OOS).

2. Set CHANNEL= “channels 1 to 8.” Although the CHANNEL_X

parameters remain writable, CHANNEL_X can only be set = X when

CHANNEL=1.

3. Set L_TYPE to direct or indirect.

4. Set XD_SCALE (transduce r measurement scaling) to the appropriate

upper and lower range values, the appropriate sensor units, and

display decimal point.

5. Set OUT_SCALE (MAI output scaling) to the appropriate upper and

lower range values, the appropria te sensor units, and display decimal

point.

6. Place the MAI Function Block in auto mode.

7. Verify that the function blocks are scheduled.

MAI

Function

Block

Out_1

Out_2

Out_3

Out_4

Out_5

Out_6

Out_7

Out_8

Contents

Main Page October 2011 Rosemount 848T Rosemount 848T High Density Temperature Transmitter with FOUNDATION fieldbus NOTICE Page Reference Manual Table of Contents SECTION 1 Introduction SECTION 2 Installation SECTION 3 Configuration Page Section 1 Introduction Rosemount 848T OVERVIEW T ransmitter Manual Reference Manual SERVICE SUPPORT Page Reference Manual Section 2 Installation SAFETY MESSAGES MOUNTING Mounting to a DIN Rail Without an Enclosure Mounting to a Panel with a Junction Box Reference Manual Mounting to a 2-in. Pipe S t and 2-in. pipe sta nd when using a junction box. WIRING Connections Page Page Reference Manual Power Supply Surges/T ransients GROUNDING Page SWITCHES Reference Manual T AGGING INSTALLATION Using Cable Glands Using Conduit Entries Section 3 Configuration CONFIGURATION St andard Transmitter Configuration Custom Configuration Methods Reference Manual Alarms Damping Configure the Differential Sensors Configure Measurement Va l i d a t i o n COMMON CONFIGURATIONS FOR HIGH DENSITY APPLICATIONS Page Interfacing Analog Transmitters to FOUNDATION fieldbus Reference Manual BLOCK CONFIGURATION Resource Block Page Page Page Reference Manual PlantWeb Page Page Recommended Actions for PlantWeb Alert s Reference Manual T ransducer Blocks Figure 3-1. Transducer Block Data Flow Page Table 3-10. Transducer Block Parameters Page Transducer Block Sub-Parameter Tables Table 3-11. XD_ERROR Table 3-12. SENSOR_CONFIG Table 3-13. SENSOR_STATUS Table 3-14. SENSOR_CAL Table 3-15. CAL_STATUS Structure Table 3-16. Transducer Status Page Page Page Reference Manual Section 4 Operation and Maintenance SAFETY MESSAGES FOUNDATION FIELDBUS INFORMATION Rosemount 848T Commissioning (Addressing) Page FOUNDATION fieldbus Resource Block Transducer Block Troubleshooting Reference Manual Appendix A Reference Data FUNCTIONAL SPECIFICATIONS Page Reference Manual PHYSICAL SPECIFICATIONS FUNCTION BLOCKS PERFORMANCE SPECIFICATIONS Accuracy Differential Configuration Notes Page A-7 Ambient Temperature Effect DIMENSIONAL DRAWINGS Rosemount 848T Reference Manual A-9 Aluminum/Plastic Junction BoxCable Gland (option codes JA2 and JP2) Front Vie w Side View Stainless Steel Junction BoxCable Gland (option code JS2) Aluminum/Plastic Junction BoxConduit Entry (option codes JA3 and JP3) Stainless Steel Junction BoxConduit Entry (option code JS3) Page ORDERING INFORMATION T able A-1. Options T able A-1. Page Reference Manual Appendix B Product Certificates HAZARDOUS LOCATIONS CERTIFICATES North American Approvals Page Page European Approvals Page Page Page Page Page Page Reference Manual INTRINSICALLY SAFE AND NON-INCENDIVE INSTALLATIONS GAS INSTALLATIONS DUST INSTALLATIONS Page Page Page Page Page Page Page Reference Manual Appendix C FOUNDATION fieldbus Technology OVERVIEW FUNCTION BLOCKS Rosemount 848T Reference Manual DEVICE DESCRIPTIONS BLOCK OPERATION Instrument- Specific Function Blocks Alert s NETWORK COMMUNICATION Link Active Scheduler (LAS) Page Addressing Scheduled T ransfers Reference Manual Unscheduled T ransfers Function Block Scheduling Reference Manual Appendix D Function Blocks ANALOG INPUT (AI) FUNCTION BLOCK AI Table D-1. Analog Input Function Block Parameters Reference Manual Functionality Page Page Page Page AI Block Reference Manual MAI MULTIPLE ANALOG INPUT (MAI) FUNCTION BLOCK Functionality Page Page Page MAI Block Reference Manual INPUT SELECTOR FUNCTION BLOCK ISEL Table D-6. Input Selector Function Block Parameters Reference Manual Functionality Page Page Figure D-6. Input Selector Function Block Application Example (SEL_TYPE = max) Figure D-7. Input Selector Function Block Application Example (SEL_TYPE = average) AVG_USE = 6 ISEL Block Index