Application Analog fault signalling 2-state output | Siemens LC 500

Application: Analog fault signalling (2-state output)

In 2-state mode, the loop current signals whether the probe is covered or uncovered, and the continuous level measurement is unavailable.

2-state mode provides:

•a 4 mA or 20 mA output to menu 07, when the level reaches one of the threshold settings

•a 3.6 or 22 mA output to menu 07 (if 2-state fault signalling is enabled at menu 08) when the process level exceeds one of the limit settings (menu 0B and 0C).

The above settings can be modified:

•The response time when thresholds are reached can be modified by Upper and/ or Lower Threshold delays (menus 03 and 04).

•The mA reading can be stabilized if necessary by applying Damping (menu 0A): the increment value is controlled at menu 09.

Example:

Current activated relay module

current loop connection

Active Shield section

(menu 0C) USL (menu 0F) URV = 100%

Upper Threshold Level = 90% menu 05 (activation hysteresis)

2-state output (menu 07)

menu 06 (deactivation hysteresis) Lower Threshold Level = 8% Menu 0E LRV = 0% Menu 0B LSL

P

83.5pF 75.8 pF

14.3pF

7.3pF

Appendix E

Device settings:
(The device is first restored to factory settings before being commissioned)
TV0 selected: Transmitter Variable 0 is PV	Menu 01 reads	Pv = 0
Lower Range Value (0% of range) is set to 14.3	Menu 0E reads	14.30
Upper Range Value (100% of range) is set to 75.8	Menu 0F reads	75.80
Current loop is in 2-state mode (C: Hi selected)	Menu 07 reads	C:Hi
2-state fault signalling enabled (F: Hi selected	Menu 08 reads	F:Hi1
Activation hysteresis is set to 90	Menu 05 reads	90.0
Deactivation hysteresis is set to 8	Menu 16 reads	08.0.

1.F: Hi appears while the button is pressed. See Analog Fault Signalling (2-state)on page 66 for more details.

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SITRANS LC 500 – INSTRUCTION MANUAL

7ML19985GE01

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Siemens LC 500 Application Analog fault signalling 2-state output, Current loop is in 2-state mode C Hi selected, CHi, FHi

Contents

Sitrans Technical data subject to change Safety Guidelines Qualified PersonnelTechnical Publications Table of Contents Maintenance Iii Appendix C Hart Documentation 113 Applications Introduction Safety marking symbols Safety NotesManual Abbreviations and Identifications Short formLong Form Description Power SpecificationsEnvironmental Performance User Interface OutputsCommunications Weight ElectrodesWetted Parts Enclosure electronic Process Conditions Approvals Sitrans LC 500 Transmitter Operating PrinciplesOperation & Application Capacitance measurement in a cylindrical metal tank Non-conductive or conductive contents A non-conductive or irregular tank Sitrans LC 500 electrodeStilling well Active shield ActiveMeasurement Section Probe seal Inactive Application Sitrans LC Level Measurement USL Switch action Interface Measurement Fault Signalling Via the loop currentVia Hart Via the solid-state output Sitrans LC 500 Probe Configuration Probe Configuration Process Connections Electrode AssemblySeal Types Pressure and Temperature Considerations Non-Standard Application Sitrans LC 500 Configuration Non-standard applications Installation Sitrans LC 500 InstallationHandling Electrodes Mounting Instructions Protection for solid-state switchProcess Cautions Sitrans LC 500 Standard Level Version Wiring Interconnection Sitrans LCSupply Interconnection Cable Selecting the correct instrumentation cable Is applications maximum cable length Multi-drop applications maximum cable lengthSubtract the capacitance for the device Which allows for 560 meters on that side Connection Diagram Connecting Sitrans LCTerminals Where the stilling well is welded to the tank 7ML19985GE01 Grounding instructions System Grounding referencing Grounding Examples Sitrans LCMetal Tanks Cathodically Protected Metal Tanks Non-Conductive Tanks Safety Grounding Example Hazardous area Non-hazardous area Typical PLC configuration with Hart DiagnosticsCommunications Current values used as signals from digital transmitters Applications for Solid-state Output Factory Settings Switch Protection DiodeSettings Setting Description Setting Interconnection LCD display Sitrans LC 500 User InterfaceUser Interface Menu Levels 00 to 0F and 10 to 1F How to access the dataDescription Menu Group Details Rotary switch Access to a menu itemAdjusting the value Push-buttons Transmitter Variables Transmitter Variable User-defined Functions Units Start-up Sitrans LC Quick StartStart Up Quick Start Sequence Rotary Switch Positions Quick Reference Num To change from menu 00 to menu Menu levels 0To change from menu 10 to menu Calibration using push-button adjustment 100% value is set Changing stepsize value menuCurrent percent of span = 14/20 = 70% Start Up Calibration using Hart Start Up Number Description Number Maintenance MaintenanceTest function Inspections Maintenance Troubleshooting Troubleshooting Sitrans LCIf you are unable to change settings Error Messages and Error Codes Error Messages push-button operationError Codes Hart Error Description Cause Message Appendix a Menu Groups Transmitter Variable Settings menu level Stepsize Update ValueRotary Left Switch Description Values Position Arrow Menu Items Damping Set the rotary switch to BLower Sensor Limit Rotary Switch Delta Range SettingUpper Sensor Limit Description Values Position Affected Rotary Left Switch Mode Affected Rotary Left Switch Mode DescriptionLower Range Value Upper Range Value Transmitter Variable Values menu levelDynamic Value, Primary Variable PV menu 00 and menu Rotary Left Description Values Switch Rotary Switch Left Arrow Description PositionTo change from menu 10 to menu Set the rotary switch to Display the Highest / Lowest Recorded Value Rotary Left Switch Mode Description Action Values Transmitter Variables Dynamic Value menu level Analog Output Signalling proportional or 2-state menu level Upper Threshold Delay 2-state modeRotary Left Added Switch Arrow Indicator Rotary Left Added Switch Arrow IndicatorUpper Threshold Setting 2-state mode Mode Description Values Position Analog Signalling Mode 2-state menu level Lower Threshold Setting 2-state mode State High Rotary Left ModeState State Low Analog Fault Signalling 2-state State mode must be selected at menuFor detailed information, see Fault Signalling on 22.0 mA Digital Output Signalling solid-state output menu level Upper Threshold Delay solid-state outputRotary Left Des Switch Identifier Cription Upper Threshold Setting solid-state output Lower Threshold Delay solid-state outputValue Rotary Left Des Switch Mode Lower Threshold Setting solid-state outputRotary Left Added Des Switch Mode Indicator Cription Rotary Left Des Switch Arrow Mode Cription Action Digital Signalling Mode solid-state output= cc Rotary Left Switch Mode Digital Fault SignallingAction Values Output Signal Processing Test Factory SettingsSwitch Left Arrow Description Display Meaning Position Miscellaneous Rotary Switch Left Arrow Description Mode Values Position Protection Display Switch LocalSettings Range Inversion LCD alphanumeric display examples Appendix B LCD display examplesAppendix B Appendix C Hart Documentation Hart informationHart Device Descriptor DD Simatic Process Device Manager PDM Sitrans LC 500 DD Menu/Variable Organization Hart Response Code Information Hart Conformance and Command Class Command Description Usage Number Command Description Usage General Transmitter InformationDamping information Non-volatile Memory Data Storage Additional Universal Command Specifications Burst modeMultiDrop operation Units conversions Appendix D Block Diagram, and Correlation table, mA to % Sitrans LC 500 Block Diagram Range 0 100 % Current in mA Correlation % 100% to 4-20 mA or 20-4 mAAppendix D Standard Version Standard Version S-Series, ThreadedSeries Threaded Appendix E Features Standard Version S-Series, Threaded Series Cable Version With weight With anchor Features Standard Version S-Series, Flanged Series, Welded Flange Features Standard Version D-Series Features Standard Version DD-SeriesStandard Version D-Series, Machined Flange Series Features Standard Version, Probe/ Thermal Isolator SD-Series Probe/Thermal IsolatorAll wetted parts made of PFA Thermal isolator to prevent Interface Version Interface Version, threaded optional sanitary and flanged Features Sanitary Version, Tri-Clamp Sanitary Version Flanges Flange Standards Examples using dimensions above Capacitance in air Applications ExamplesGeneric Application Calculations Capacitance in oil Larger tank, dimensions in feet PF = 33.2 pF Device settings CAn90.0 08.0 Application Analog fault signalling 2-state output Current loop is in 2-state mode C Hi selectedState fault signalling enabled F Hi selected CHi USL is set to 83.50 pF LSL is set to 7.3 pF Appendix F Approvals CE CertificateSitrans LC 500 / Pointek CLS Appendix F Wir erklären hiermit auf eigene Verantwortung, dass der CE BescheinigungHinweis Instrument label Sitrans LC Kema certificate and schedules Appendix F Appendix F Appendix F Appendix F Appendix F Appendix F Appendix F Certificates and Approvals Application SpecificationsNamur recommendation NE Approval Glossary Glossary 7ML19985GE01 Numerics IndexIndex Wiring Index Quick Reference Sitrans LC Quick Reference Rotary Switch Positions Quick Reference Page 7ml19985GE01