Emerson 848T manual Transducer Block Troubleshooting, Foundation fieldbus

Page 50

Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA October 2011

TROUBLESHOOTING

FOUNDATION fieldbus

Symptom

Possible Cause

Corrective Action

Device does not show

Network configuration parameters

Set the network parameters of the LAS (host system) according to the FF

up in the live list

are incorrect

Communications Profile

 

 

ST: 8

 

 

MRD: 4

 

 

DLPDU PhLO: 4

 

 

MID: 7

 

 

TSC: 4 (1 ms)

 

 

T1: 96000 (3 seconds)

 

 

T2: 9600000 (300 seconds)

 

 

T3: 480000 (15 seconds)

 

Network address is not in polled

Set first Unpolled Node and Number of UnPolled Nodes so that the device

 

range

address is within range

 

Power to the device is below the

Increase the power to at least 9V

 

9 VDC minimum

 

 

Noise on the power /

Verify terminators and power conditioners are within specification

 

communication is too high

Verify that the shield is properly terminated and not grounded at both ends. It is

 

 

best to ground the shield at the power conditioner

Device that is acting as

LAS Scheduler was not

Ensure that all of the devices that are intended to be a Backup LAS are

a LAS does not send

downloaded to the Backup LAS

marked to receive the LAS schedule

out CD

device

 

All devices go off live

Live list must be reconstructed by

Current link setting and configured links settings are different. Set the current

list and then return

Backup LAS device

link setting equal to the configured settings.

Resource Block

 

 

Symptom

Possible Causes

Corrective Action

Mode will not leave

Target mode not set

Set target mode to something other than OOS.

OOS

 

 

 

Memory Failure

BLOCK_ERR will show the lost NV Data or Lost Static Data bit set. Restart the

 

 

device by setting RESTART to Processor. If the block error does not clear, call

 

 

the factory.

Block Alarms Will not

Features

FEATURES_SEL does not have Alerts enabled. Enable the report bit.

work

 

 

 

Notification

LIM_NOTIFY is not high enough. Set equal to MAX_NOTIFY.

Transducer Block Troubleshooting

 

Symptom

Possible Causes

Corrective Action

Mode will not leave

Target mode not set

Set target mode to something other than OOS.

OOS

A/D board check sum error

The A/D board has a checksum error.

 

Resource block

The actual mode of the Resource block is in OOS. See Resource Block

 

 

Diagnostics for corrective action.

 

Transducer Block

The actual mode of the Transducer Block is OOS.

The primary value is

Measurement

Look at the SENSOR_STATUS parameter (See Table 3-16 on page 3-21)

BAD

 

 

4-4

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Contents Reference Manual 00809-0100-4697, Rev EA OctoberPage Rosemount 848T High Density Temperature Transmitter with Customer Central National Response Center InternationalPage Table of Contents Appendix a Operation MaintenanceSection TOC-2Process leaks could result in death or serious injury Safety MessagesSection Introduction Electrical shock could cause death or serious injuryOverview Fieldbus host or configuration toolMaintenance of the Rosemount 848T Temperature Transmitter TransmitterService Support Rosemount 848T Section Installation Safety Messages MountingMounting to a DIN Rail Without an Enclosure Mounting to a Panel with a Junction BoxMounting to a 2-in. Pipe Stand Aluminum/Plastic Junction Box Stainless Steel Junction BoxConnections WiringSpur Signal Wiring Devices 1 through Leads and terminalsAnalog Inputs RTD or Ohm InputsThermocouple or Millivolt Inputs Ohm resistor in the loop when switched to the left ConnectorsPower Supply Analog InputConnections Power SupplySurges/Transients Shielded Wire GroundingMA loop 848T Power Supply Sensor Wires Shield ground pointsTransmitter Enclosure optional Fieldbus busSwitch is not functional SwitchesSimulate Enable SecurityTransmitter Tag TaggingCommissioning Tag Sensor TagUsing Conduit Entries InstallationUsing Cable Glands Section Configuration Standard ConfigurationTransmitter Configuration Custom Configuration Methods Rosemount 848T Function Common Configurations for High Density ApplicationsTypical Profiling Application BlockMeasuring Temperature Points Individually Monitoring Application with a Single SelectionMultiple Analog Input or Analog Input Block Configuration Number Parameter Description Block ConfigurationResource Block 00809-0100-4697, Rev EA October Resource Block Parameters Startwithdefaults SaveconfignowSaveconfigblocks FailedenableAutomatic Auto Block ErrorsModes Block is processing its normal background memory checksPlantWeb Alerts Out of Service OOSAlarm Detection Status Handling00809-0100-4697, Rev EA October Failure Alarms FailedmaskAlarm Maintenance Alarms/Priority AlarmAdvisory Alarms Alarm Type Active Event Recommended Action Recommended Actions for PlantWeb AlertsRESOURCE.RBSFTWRREVALL Transducer BlocksRESOURCE.HARDWAREREV, Channel Definitions for the 848T Transducer Block ErrorsTransducer Block Channel Definitions Channel DescriptionTransducer Block Modes 00809-0100-4697, Rev EA October Block/Transducer ErrorTransducer Block Alarm Detection Block outputs reflect the analog input measurementSENSOR3CONFIG SENSOR1CONFIGSENSOR2CONFIG SENSOR4CONFIGChanging the Sensor Configuration in the Transducer Block Transducer Block Sub-Parameter Tables 11. Xderror Sub-Parameter Structure12. Sensorconfig Sub-Parameter Structure 15. Calstatus Structure 13. Sensorstatus Sub-Parameter Structure14. Sensorcal Sub-Parameter Structure 16. Transducer Status Sub-Parameter StructureStructure StructureDual Sensor Status Table Structure Parameter Description 20. Validation Config Sub-Parameter StructureSensor Calibration in the Sensor Transducer Block Rosemount 848T Foundation Operation and MaintenanceFoundation Fieldbus Information Commissioning Addressing Sensor Check Hardware MaintenanceRestart with Defaults Restart Processor cyclingSymptom Possible Cause Corrective Action TroubleshootingTransducer Block Troubleshooting Symptom Possible Causes Corrective ActionFunctional Specifications Appendix a Reference DataBackup Link Active Scheduler LAS Update TimeAlarms Transient ProtectionPhysical Specifications Performance Specifications Function BlocksAccuracy Sensor Option Sensor Reference 3-Wire RTDsAccuracy for Differential Configurations Input RangesSensor Option Alarm Levels Accuracy Analog Sensors 4-20mAAmbient Temperature Effect Rosemount 848T Dimensional DrawingsAmbient Temperature Notes Examples Top ViewFront View Side View Stainless Steel Junction Box-Cable Gland option code JS2Side View Front View Stainless Steel Junction Box-Conduit Entry option code JS3 Side ViewStainless Steel Junction Box Style JS Mounting OptionsAluminum/Plastic Junction Box Styles JA and JP Front View Side ViewOrdering Information OptionsConduit Electrical Connector Standard Software Configuration StandardSpecial Temperature Test Expanded Enclosure Options StandardRosemount 848T Hazardous Locations Certificates Table B-2. Entity Parameters for Non Incendive Field WiringAppendix B Product Certificates North American ApprovalsPower/Bus Canadian Standards Association CSA Certifications Atex Certifications Power/Bus SensorEuropean Approvals Special Conditions for Safe UseCi = Li = Rosemount 848T Special Conditions of Safe Use IECEx CertificationsRosemount 848T Parameters Terminals of power/loop China NEPSICertificationsJapanese 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 Appendix C Foundation fieldbus Technology Overview Function BlocksSnap InputOutput Linkages StatusResource Blocks Device Descriptions Block OperationInstrument- Specific Function Blocks Alerts Transducer BlocksFieldbus Link Network CommunicationLink Active Scheduler LAS LAS Parameters MID x ST DataPublisher/Subscriber Backup LASAddressing Scheduled Transfers Report DistributionDevice Device Y Device Z Unscheduled TransfersSchedule Function Block Scheduling Number Parameter Units Description Appendix D Function BlocksAnalog Input AI Function Block OUTOutscale AlarmhysXdscale IooptsFunctionalitySimulation OUT mode in manOUT mode in auto 63% of ChangeDirect Signal ConversionFiltering IndirectIndirect Square Root ConditionsValue of the block output OUT may be set manually Table D-3. Alarm Priority LevelsManual Man BAD if Limited Uncertain if in Manual modeAdvanced Features Uncertain if LimitedXdblock AI Block TroubleshootingApplication Information HIHILIMIT, LolimitMultiple Analog Input MAI Function Block Table D-4. Multiple Analog Input Function Block ParametersCAPSTDDEV1 Figure D-4. Multiple Analog Input Function Block Schematic SimulateTable D-5. Blockerr Conditions Option in Manual or Out of Service mode onlyDevices such as flowmeters Block output OUT may be set manually MAI Block Troubleshooting IN1 IN2 IN3 IN4 IN5 IN6 IN7 Input Selector Function BlockTable D-6. Input Selector Function Block Parameters OUT OutrangeSelected SelecttypeMingood OpselectAlarm OUT INn DISABLEnMode Logic Selection FunctionalityTable D-8. Alarm Priority Levels OUT reflects the selected valueBlock Execution Use Uncertain as GoodIsel Block Troubleshooting Index NumericsAlarm Detection Configuration Errors Modes AutomaticMaintalarms Troubleshooting Errors Modes AutomaticPage Rosemount Inc Pacific Private Limited

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.

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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.