Emerson 848T manual Monitoring Application with a Single Selection

Page 27

Reference Manual

00809-0100-4697, Rev EA October 2011

Rosemount 848T

Monitoring Application with a Single Selection

Example: Average exhaust temperature of gas and turbine where there is a single alarm level for all inputs.

 

Out_1

 

IN_1

 

 

Out

 

 

 

 

 

 

 

 

Out_2

 

IN_2

 

 

Out_D

 

 

 

 

 

 

 

 

 

Out_3

 

IN_3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Out_4

 

IN_4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Out_5

 

IN_5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAI

Out_6

 

IN_6

 

 

ISEL

 

 

 

 

 

Out_7

 

IN_7

 

 

 

 

 

Function

 

 

 

Function

 

 

 

 

 

Block

Out_8

 

IN_8

 

 

Block

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.Link the MAI outputs to the ISEL inputs.

2.Place the Multiple Analog Input (MAI) function block in OOS mode (set MODE_BLK.TARGET to OOS).

3.Set CHANNEL= “channels 1 to 8.” Although the CHANNEL_X parameters remain writable, CHANNEL_X can only be set = X when CHANNEL=1.

4.Set L_TYPE to direct or indirect.

5.Set XD_SCALE (transducer measurement scaling) to the appropriate upper and lower range values, the appropriate sensor units, and display decimal point.

6.Set OUT_SCALE (MAI output scaling) to the appropriate upper and lower range values, the appropriate sensor units, and display decimal point.

7.Place the MAI function block in auto mode.

8.Place the Input Selector (ISEL) function block in OOS mode by setting MODE_BLK.TARGET to OOS.

9.Set OUT_RANGE to match the OUT_SCALE in the MAI block.

10.Set SELECT_TYPE to the desired function (Maximum Value, Minimum Value, First Good Value, Midpoint Value, or Average Value).

11.Set the alarm limits and parameters if necessary.

12.Place the ISEL function block in auto mode.

13.Verify that the function blocks are scheduled.

Measuring Temperature Points Individually

AI

 

Out

 

 

 

Function

Out_D

Block 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AI

 

Out

 

 

 

Function

Out_D

Block 8

Example: Miscellaneous monitoring of temperature in a “close proximity” where each channel can have different sensor inputs with different units and there are independent alarm levels for each input.

1.Place the first Analog Input (AI) function block in OOS mode (set MODE_BLK.TARGET to OOS).

2.Set CHANNEL to the appropriate channel value. Refer to “Alarm Priority Levels” on page 3-11for a listing of channel definitions.

3.Set L_TYPE to direct.

4.Set XD_SCALE (transducer measurement scaling) to the appropriate upper and lower range values, the appropriate sensor units, and display decimal point.

5.Set OUT_SCALE (AI output scaling) to the appropriate upper and lower range values, the appropriate sensor units, and display decimal point.

6.Set the alarm limits and parameters if necessary.

7.Place the AI function block in auto mode.

8.Repeat steps 1 through 7 for each AI function block.

9.Verify that the function blocks are scheduled.

3-5

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Contents 00809-0100-4697, Rev EA October Reference ManualPage Customer Central National Response Center International Rosemount 848T High Density Temperature Transmitter withPage Table of Contents TOC-2 Operation MaintenanceSection Appendix aElectrical shock could cause death or serious injury Safety MessagesSection Introduction Process leaks could result in death or serious injuryTransmitter Fieldbus host or configuration toolMaintenance of the Rosemount 848T Temperature Transmitter OverviewService Support Rosemount 848T Safety Messages Mounting Section InstallationMounting to a Panel with a Junction Box Mounting to a DIN Rail Without an EnclosureAluminum/Plastic Junction Box Stainless Steel Junction Box Mounting to a 2-in. Pipe StandLeads and terminals WiringSpur Signal Wiring Devices 1 through ConnectionsRTD or Ohm Inputs Thermocouple or Millivolt InputsAnalog Inputs Analog Input ConnectorsPower Supply Ohm resistor in the loop when switched to the leftPower Supply Surges/TransientsConnections Grounding Shielded WireFieldbus bus 848T Power Supply Sensor Wires Shield ground pointsTransmitter Enclosure optional MA loopSecurity SwitchesSimulate Enable Switch is not functionalSensor Tag TaggingCommissioning Tag Transmitter TagInstallation Using Cable GlandsUsing Conduit Entries Section Configuration Configuration Transmitter Configuration Custom Configuration MethodsStandard Rosemount 848T Block Common Configurations for High Density ApplicationsTypical Profiling Application FunctionMonitoring Application with a Single Selection Measuring Temperature Points IndividuallyMultiple Analog Input or Analog Input Block Configuration Block Configuration Resource BlockNumber Parameter Description 00809-0100-4697, Rev EA October Resource Block Parameters Failedenable SaveconfignowSaveconfigblocks StartwithdefaultsBlock is processing its normal background memory checks Block ErrorsModes Automatic AutoStatus Handling Out of Service OOSAlarm Detection PlantWeb AlertsFailedmask 00809-0100-4697, Rev EA October Failure AlarmsMaintenance Alarms/Priority Alarm Advisory AlarmsAlarm Recommended Actions for PlantWeb Alerts Alarm Type Active Event Recommended ActionTransducer Blocks RESOURCE.HARDWAREREV,RESOURCE.RBSFTWRREVALL Channel Description Transducer Block ErrorsTransducer Block Channel Definitions Channel Definitions for the 848TBlock outputs reflect the analog input measurement 00809-0100-4697, Rev EA October Block/Transducer ErrorTransducer Block Alarm Detection Transducer Block ModesSENSOR4CONFIG SENSOR1CONFIGSENSOR2CONFIG SENSOR3CONFIGChanging the Sensor Configuration in the Transducer Block 11. Xderror Sub-Parameter Structure 12. Sensorconfig Sub-Parameter StructureTransducer Block Sub-Parameter Tables 16. Transducer Status Sub-Parameter Structure 13. Sensorstatus Sub-Parameter Structure14. Sensorcal Sub-Parameter Structure 15. Calstatus StructureStructure Dual Sensor Status TableStructure 20. Validation Config Sub-Parameter Structure Sensor Calibration in the Sensor Transducer BlockStructure Parameter Description Rosemount 848T Operation and Maintenance Foundation Fieldbus InformationFoundation Commissioning Addressing Restart Processor cycling Hardware MaintenanceRestart with Defaults Sensor CheckSymptom Possible Causes Corrective Action TroubleshootingTransducer Block Troubleshooting Symptom Possible Cause Corrective ActionAppendix a Reference Data Functional SpecificationsTransient Protection Update TimeAlarms Backup Link Active Scheduler LASPhysical Specifications Function Blocks Performance SpecificationsInput Ranges Sensor Option Sensor Reference 3-Wire RTDsAccuracy for Differential Configurations AccuracyAnalog Sensors 4-20mA Sensor Option Alarm Levels AccuracyAmbient Temperature Effect Top View Dimensional DrawingsAmbient Temperature Notes Examples Rosemount 848TStainless Steel Junction Box-Cable Gland option code JS2 Side View Front ViewFront View Side View Side View Stainless Steel Junction Box-Conduit Entry option code JS3Front View Side View Mounting OptionsAluminum/Plastic Junction Box Styles JA and JP Stainless Steel Junction Box Style JSOptions Ordering InformationEnclosure Options Standard Software Configuration StandardSpecial Temperature Test Expanded Conduit Electrical Connector StandardRosemount 848T North American Approvals Table B-2. Entity Parameters for Non Incendive Field WiringAppendix B Product Certificates Hazardous Locations CertificatesPower/Bus Canadian Standards Association CSA Certifications Special Conditions for Safe Use Power/Bus SensorEuropean Approvals Atex CertificationsCi = Li = Rosemount 848T IECEx Certifications Special Conditions of Safe UseRosemount 848T China NEPSICertifications Parameters Terminals of power/loopJapanese Certifications Intrinsically Safe and NON-INCENDIVE Installations Installation Drawings Figure B-1. FM Intrinsic Safety/ Fisco 00809-0100-4697, Rev EA Rosemount 848T Figure B-2. CSA Intrinsic Safety/ Fisco Rosemount 848T Rosemount 848T Overview Function Blocks Appendix C Foundation fieldbus TechnologyLinkages Status InputOutput SnapTransducer Blocks Device Descriptions Block OperationInstrument- Specific Function Blocks Alerts Resource BlocksNetwork Communication Link Active Scheduler LASFieldbus Link MID x ST Data LAS ParametersReport Distribution Backup LASAddressing Scheduled Transfers Publisher/SubscriberUnscheduled Transfers ScheduleDevice Device Y Device Z Function Block Scheduling OUT Appendix D Function BlocksAnalog Input AI Function Block Number Parameter Units DescriptionIoopts AlarmhysXdscale Outscale63% of Change OUT mode in manOUT mode in auto FunctionalitySimulationIndirect Signal ConversionFiltering DirectConditions Indirect Square RootTable D-3. Alarm Priority Levels Manual ManValue of the block output OUT may be set manually Uncertain if Limited Uncertain if in Manual modeAdvanced Features BAD if LimitedHIHILIMIT, Lolimit AI Block TroubleshootingApplication Information XdblockTable D-4. Multiple Analog Input Function Block Parameters Multiple Analog Input MAI Function BlockCAPSTDDEV1 Simulate Figure D-4. Multiple Analog Input Function Block SchematicOption in Manual or Out of Service mode only Devices such as flowmetersTable D-5. Blockerr Conditions Block output OUT may be set manually MAI Block Troubleshooting OUT Outrange Input Selector Function BlockTable D-6. Input Selector Function Block Parameters IN1 IN2 IN3 IN4 IN5 IN6 IN7Opselect SelecttypeMingood SelectedFunctionality INn DISABLEnMode Logic Selection Alarm OUTOUT reflects the selected value Table D-8. Alarm Priority LevelsUse Uncertain as Good Block ExecutionIsel Block Troubleshooting Numerics IndexErrors Modes Automatic Configuration Errors Modes AutomaticMaintalarms Troubleshooting Alarm DetectionPage Pacific Private Limited Rosemount Inc

848T specifications

The Emerson 848T is a state-of-the-art temperature transmitter designed for accurate and reliable temperature measurement in various industrial applications. This device has gained recognition for its advanced features and robust performance, making it a popular choice among engineers and technicians in the field.

One of the key highlights of the Emerson 848T is its unique dual-channel capability, which allows it to seamlessly monitor two temperature sources simultaneously. This functionality is particularly beneficial in processes where multiple temperature points need to be assessed, optimizing efficiency and reducing the need for additional equipment. It supports various sensor types, including thermocouples, RTDs, and resistance temperature detectors, making it versatile for different applications.

The 848T is equipped with sophisticated digital processing technology, which enhances its accuracy and stability. It features a 24-bit analog-to-digital converter, ensuring precise measurement and minimizing drift over time. Moreover, the device boasts a wide operating temperature range, accommodating ambient conditions from -40°C to 85°C. This durability makes it suitable for harsh environments commonly encountered in industries such as oil and gas, pharmaceuticals, and power generation.

Another significant characteristic of the Emerson 848T is its configurable output options. Users can choose from a range of output signals, including 4-20 mA, which provides a standard interface for integration into existing control systems. Additionally, it offers a HART communication protocol, allowing for easy configuration, calibration, and diagnostics through a digital interface. This feature enhances the transmitter's usability, enabling operators to perform adjustments without direct access to the device.

The device is designed with user-friendliness in mind. Its intuitive setup procedure and robust graphical user interface simplify the commissioning process, ensuring that even those new to the technology can easily navigate the system. An integrated LCD display provides real-time readings and status information, facilitating monitoring at a glance.

In summary, the Emerson 848T temperature transmitter combines reliable performance, user-friendly design, and advanced digital technologies. Its dual-channel capability, wide sensor compatibility, and adjustable output options make it an essential tool for achieving precise temperature measurements in various industrial settings. With these compelling features, the Emerson 848T stands out as a leading choice for professionals seeking accuracy and efficiency in their temperature monitoring applications.
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