Varec 4000 manual Theory of Operation

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Theory of Operation	Tank Gauge Transmitter

42	Installation and Operations Manual

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Contents Installation Operations Manual Page Copyright Disclaimer of Warranties Safety Precaution Definitions Safety Precautions Tank Gauge Transmitter Introduction Tank Gauge Transmitter Glossary Tank Gauge Transmitter Viii Using This Manual IntroductionOperation ConfigurationConstruction Installation Mounting the Equipment Part Number Gauge Adapter KitWiring ATT WiringWiring Preparation Connecting Input PowerConnecting Host Communication Terminal Block One TB1 Terminal Block Two TB2ATT EIA485 Wiring Typical EIA485 WiringTypical EIA485 System Wiring ATT Mark/Space Wiring Typical Mark/Space Field WiringConnecting the RTD Connecting the Handheld TerminalWiring Completion Installation CheckoutConfiguration Configuration Parameters1200 Hand Held Terminal Function Key DescriptionTerminal Mode Configuration Terminal Mode Operation 1200 Hand Held TerminalMenu Operation Main Menu Main Menu DescriptionSummary Menu Summary Menu DescriptionConfiguration Menu Configuration Menu DescriptionHost Menu Host Menu DescriptionQuick Setup General Configuration Imperial Fractional 1900 Quick Setup DefaultsHost Configuration Imperial Decimal 1900 Quick Setup Defaults 3 0-20 Meter 1900 Quick Setup Defaults 4 0-30 Meter 1900 Quick Setup Defaults Imperial Fractional 1800 Series Transmitter Quick Setup Imperial Decimal 1800 Series Transmitter Quick Setup7 0-20 Meters 1800 Series Transmitter Quick Setup 8 0-30 Meters 1800 Series Transmitter Quick SetupImperial Modbus Quick Setup Defaults Metric Modbus Quick Setup Defaults Maintenance Maintenance and TroubleshootingBattery Replacement ATT Error Status Conditions TroubleshootingError Message Description ATT Status Conditions ATT Configuration Error CheckingStatus Condition Description Model 1200 Error Messages Host Communication Loopback TestsSpecifications Specifications and Physical CharacteristicsInput Power EnvironmentalLevel Measurement Safety Agency Approvals Intrinsic SafetyExplosion Proof Agency Acronym RequirementAssembly/Component Part Number Major System Assemblies and ComponentsOrder Codes CommunicationsOrder Codes Theory of Operation CPU BoardBack-up Battery Status Inputs and OutputsAtti Communications Port Host Communications InterfacesTemperature Measurement Encoder Battery BackupHost Communication Function Number Mark/Space Host InterfaceNumber Exception Modbus Support over Mark/Space Host Interface Compatibility with Varec Tank Polling UnitTheory of Operation ATT Family of Products Model 4040 Display UnitRelay Specifications Model 4050 Digital Input/Output UnitDigital Outputs Digital InputsIntroduction Modbus ImplementationImplementation Modbus Implementation Integer Registers Functions and Data FormatsTerm Definition Host Request Integer DataATT Response Character Data Coded Data Packed Bit DataFloating-Point Registers Floating-Point DataTwo 16-bit Registers Format Floating Point DataOne 32-bit Register Format Status Bits Status Bit DataException Responses Exception Response ReasonLoopback Test Data Out of RangeHardware Implementation Integer Register Map Register Number Type DescriptionRegister Number Sw Ver0-1 Noise Reject Type Floating Point Register Map Status Bit Register MapModbus Implementation Optional Interfaces 10.1 4000TIFMO10.2 4000GEFMO 10.3 4000LJFMO10.5 4000WBFMO 10.6 4000GMFMOGlossary Adv Hi LevelDband TSU Tank Gauge Transmitter 4000 Your official representative Your offical representative