Fail-safe value

The Fail-safe condition may be triggered by a loss of echo, a bad configuration, or certain device faults. You can select one of three possible values to be reported when a Fail-safe mode occurs:

•User-defined default value (Fail-safe value) used as output value.

•Store last valid output value.

•Calculated output value is incorrect.

The user-defined Fail-safe value allows you to enter the safest output value for your application.

A: Technical Reference

7ML19985JM01

SITRANS LR 460 – INSTRUCTION MANUAL

Page A-75

Page 81

Image 81

Siemens LR 460 instruction manual Fail-safe value

Contents

Sitrans Contact Smpi Technical Publications at the following address Table of Contents Quick Start Wizard via the handheld programmer Table of Cotents AIFB1 AIFB2 Iii Appendix F Hart Information Structure Safety marking symbols Safety NotesDirect Current 7ML19985JM01 FCC and IC Conformity Canadian Installations only Industry Canada IC rules Support ManualApplication Examples Abbreviations and Identifications Short Long Form Description Units Cont’d Programming Approvals and CertificatesSystem Implementation Power SpecificationsSpecifications Performance Interface Mechanical Programmer infrared keypad1 Environmental ProcessCommunication Approvals Standard configuration Dimensions Installation InstallationMounting Location Nozzle design Key considerationsNozzle location Device orientation Installation in vessel with obstructions Polarization Reference PointPolarization Reference Point Holding the electronics enclosure firmly Easy Aimer Installation Air Purging System Optional Air ConsumptionFlow rate versus applied pressure Pipe Flange Thick Bolt Hole No. Slotted Flange Dimensions see above Optional Dust Cap Installation Connecting Sitrans LR Wiring Hart wiring Connecting Hart Typical PLC/mA configuration with HartAC version DC version Profibus wiring Power DemandsBus Termination AC version DC version From Connecting Sitrans LR 460 on page 19, step For use and assembly, refer to the main instructions Hazardous area installationsProduct Nameplate Reference European Atex Directive 94/9/EC, Annex II, 1/0/6 Thermal Data for 7ML5426 Series Device Permitted ambientDirective 94/9/EC Annex II, clause 61241 -17 in Europe 7ML19985JM01 Quick Start RUN mode displayActivating Sitrans LR Quick Start Programming Sitrans LR Press Mode to return to RUN mode Quick Start Quick Start Wizard via the handheld programmerLanguage Application Type Options Units Operation typesHigh Calibration Point Values Configuring a new device Quick Start Wizard via Simatic PDMDevice Description DD Identification Quick Start Wizard steps Application type Range Setup Summary Level application example Quick Start Setting Description Auto False Echo Suppression Simatic PDM Rev .0, SP2 Features Operating Sitrans LR 460 viaFunctions in Simatic PDM Trend Diagram Level Trend over Time Echo profile saving and viewingOpen the menu View Trend to see the level trend over tme Open the menu Device TVT Shaper Manual TVT Shaper Accessing Functions in PDM Online DisplayDisplay Changing parameter settings via Simatic PDM Configuring a new deviceDevice Description DD Reset Parameters accessed via pull-down menusConfiguration Flag Reset Hart only Calibrating LR 460 via PDM Simulate AO Analog Output Digital/Analog TrimSimulation Simulate Analog Input to AIFB1 or AIFB2 Parameter menus Parameter ReferencePull-down menus via Simatic PDM Device menus View menus Quick Start Wizard Language OptionsOperation Slow Identification ConfigurationOperation Unit Open the menu Device Set Address Description To perform a Reset via the handheld programmerProgram Mer Handheld DeviceProgrammer Statistics Input Sensor Calibration Low Calibration Pt. default 30.000 mCalibration Sensor Units Low Level Point default High Calibration Pt. default 0.350 mHigh Level Point default Level Offset default Measuring Limits Detailed SetupValues Options Ters RelatedParameters Parame Parame Echo detection positionEcho Sampling Window Range Window UsedNear Range Far Range To use Auto False Echo Suppression via Simatic PDM TVT Auto False Echo Suppression setupOpen the menu Device Auto False Echo Suppression Auto TVT Auto False Echo Suppression Example after Auto False Echo Suppression Display before Auto False Echo Suppression TVT Hover Level Manual TVT Shaper ModeManual TVT shaper To change a breakpoint via PDM Values Range 0.0000 to 99999 m / min Altered byAltered by Related Output Echo InformationAIFB1 Batch Phase Target Mode Profibus PA onlyUnit Filter Time Constant Process Value Scale Upper Limit AlarmUpper Value Output Scale Limit Hysteresis Fail-safe Mode Profibus PA onlyMin Out Max Out MA Output AIFB2See AIFB1 the parameters for AIFB2 are identical MA OUT value = x x 16 mA + 4 y Man Value Related parame Certificates and Approvals Relay ConfigurationDevice Certification Related parame Maintenance settings Remaining Device LifetimeRemaining Sensor Lifetime Calibration Interval Service Interval Parameters Appendix a Technical Reference Related Response LOE Timer Fill RatePrinciples of Operation Measurement Response Profile monitoring via Simatic PDM Echo ProcessingEcho selection Time Varying Threshold TVT Auto False-Echo Suppression False EchoesBeam angle at -3dB reference Technical LOE Timer Fail-safe ModeEcho confidence Near Range Blanking Fail-safe value Temperature on the LCD secondary display Maximum Process Temperature Chart Appendix B Troubleshooting Troubleshooting LR Symptom Possible cause RemedyTroubleshooting Set Far Range to a lower value Reads empty Reads vessel bottom RegionFluctuates Is normal Troubleshooting LR 460 cont’d Symptom Possible cause Remedy General Fault Codes/PROFIBUS PA Extended Diagnostics Outside its temperature Perform serviceSame Check configuration for Has expired Eeprom damaged Local Siemens Representative Local Siemens By a memory error RepresentativeEeprom corrupt For the network Module Representative Local Siemens Device has been lost RepresentativeUnable to collect profile Local Siemens Representative Local Siemens Distance measurement Representative Appendix C Maintenance MaintenanceUnit Repair and Excluded Liability Program Mode Display RUN mode startup displayLCD Display Local Interface Handheld programmer Hand-held programmer key functions in RUN modeProgramming via the handheld programmer Key Function Hand-held programmer key functions in Edit mode Hand-held programmer key functions in Navigation modeIndividual Parameter Reset Key Name When Navigation Mode Simatic Process Device Manager PDM Hart Device Description DDHart modem interface for Simatic PDM Hart Communications Sitrans LR 460 does not support Burst Mode Burst ModeHart Version Hart Communication Parameter Profile structure Hart Block Model for recording and processing measured valuesLevel Transducer Block LTB F-90 Analog Input Function Blocks AIFB1 and AIFB2 Description of the blocks Appendix G Remote operation via Configuration toolDevice Description Remote Operation PA Configuration GSD file Setting the Profibus addressConfiguring a new device procedure Calibration via Simatic PDM Configuring Profibus PA with an S7-300/ 400 PLC Cyclic versus Acyclic Data Appendix H Communication viaCyclic Data Communication PA Status Codes for Good Quality Status ByteCodes for Bad Quality H-96 Acyclic Diagnostics DiagnosticsDiagnosis reply applies only to cyclic masters Status Codes for Uncertain Quality Byte Bit Description Indication Class Acyclic Data Transmission= set H-98 Appendix J Profibus PA Profile Structure Profibus Level Device DesignProfile structure PA Level Transducer Block function groups See parameter diagram onProfie structure PA How the Level Transducer Block works Sensor Reference Point Electronics temperature Analog Input Function Blocks 1How the AIFBs work Setting Description Output value J-104 Software DD Rev Date Changes Software revInitial release K-106 Sorftware rev Glossary Glossary Glossary Stilling-well see stillpipe Glossary Index Index Quick Start Wizard Reform Echo Reliable echo indicator 85 repairView Status byte LCD menu structure Echo SEL LCD menus LCD menu charts LCD menu charts 7ml19985JM01