RS-485 Communications, Power-Up | Varec 8315 Series guide

8300	Installation

RS-485 Communications

•To install the RS-485 communications option, connect a single twisted wire pair to J5 (COM1).

Note! When using COM1, Switch SW2 must be set for RS-485 mode.

Power-Up

Before the field cables are attached, perform an initial system verification.

Initial system verification

•Connect the power cable to power connector P1, then connect an RS-232 cable from a PC with ViewRTU to J7 (COM0).

•Power up the unit.

The CPU LED on the tank gauge interface module should toggle on and off. If the CPU indicator is not flashing, turn off system power and proceed with the Troubleshooting and Calibration chapter.

Establishing Host Communications

When the main system power is turned on, the Host communications status is set to On- line by default. The TankGate then waits for a valid poll from the Host computer. If the communication cable is installed and the Host is running, a communications link is established. Verify this condition with a hand-held terminal or ViewRTU.

Verifying Host Communications

•Display the COM Point and verify that an On-line condition is indicated.

69

Image 79

Varec 8315 Series manual RS-485 Communications, Power-Up, Initial system verification, Establishing Host Communications

Contents

Installation Operations Manual Page Copyright Disclaimer of Warranties Safety Precaution Definitions Safety Precautions Overview InstallationUsing ViewRTU Troubleshooting and maintenance Contents System Information SYS Using ViewRTU Troubleshooting Versions FeaturesApplications Operating temperature Specifications System DesignPower Supply Power consumption Humidity Storage temperatureMechanical Construction Overview TankGate Interface Hardware Motherboard Description Hardware Block Diagram TankGate motherboard Surge Protection Surge Gnd terminal block J4 Unit AC Input Power terminal block J2Field Power Vfield terminal block J3 Auxiliary DC Output Power terminal block J8 Field Voltage Selection Jumper W3 AC Power Fuses F1,F2 Reset push-button SW3 Switches and IndicatorsHard Reset 3.1 COM0 J7 Communications 3.4 COM1 Hardware Handshaking Switch SW1 3.3 COM1 RS232/RS-485 Selection Switch SW23.2 COM1 RS-232/RS-485 J5 SW2 Set Tion Physical Handshak Ting Layer Ing Communica Hardware With RTS / CTS RS-232J6 TankGate Communications Cable 8315 L&J Tankway Interface Module Model 8315 TankGate Description LED Indicators D1-D6 ID DIP Switch SW1 Surge/Shield Ground Connector J4 External Power Connector +48V J2 Connect the field wiring Field Wiring terminal block J3 8315 L&J Tankway Interface Module TankGate Interface Automatic Fault Recovery Software Features Real-Time / Multitasking ExecutiveReal-Time Clock System Tasks ProtocolsData Scanning Task Database Manager TankGate 8315 Software Blocks TankGate Software Blocks Parameter Classes Database OrganizationPoint Format Parameter Description Common Parameters Parameter Data FormatsData Format Description Value Parameter PntCheckSum ParameterPntStatus Parameter Elapse Parameter Change of State-Related Parameters Gathering Point DataStandard Request-Response Format Change of State Format Deadband Modbus Slave Modbus Communications Function Code Description Comments Fixed Modbus MapAddress Type Number Parameter Data Type Gwblk method 8315 L&J Tankway Software Description TankGate Interface Data Address Parameter Comments Dynamic Parameters Function Configuration Parameters FunctionClock CLK Parameters Communications COM Configuration Function Parameters Application Dynamic Function Parameters Floating Point Register FpregReal 4 bytes value API Emulator EMU Byte value indicating status of point Values are Hex representation of the request sent by the host Configuration Parame Function TersCurrent Command EMU Gateway Emugw Displays the tank number of the currently selected tank Gauging Systems Inc. Model 2000 Interface GS2000 Last message. The maximum is 255 seconds. The default is Raw2 Gateway Block Gwblk Addr1 is the Data Address and PntRef1 is the corresponding Byte value indicating status of point Values are No errorCRC-16 Checksum of points static Configuration Parameters Size Parameter Integer 2 bytes value Integer Register Ireg Current request message, displayed in hex format Modbus Gateway Modgw Current command. Values include Value = Ax + By + Cz + K Scaler Point ScalerDynamic Parame Function Ters Output value for the Scaler point Value parameter converted to Integer format System Information SYS 17 L&J MCG1000 Tank Gauge LJ1000 PntStatus will be set to indicate the failure Application 18 L&J MCG1500 Tank Gauge LJ1500 Task on the Motherboard determines that the Model 8315 has 8315 L&J Tankway Software Description TankGate Interface 19 L&J MCG2000 Tank Gauge LJ2000 Enables the watchdog task on the Motherboard. The watchdog 8300 20 L&J Scanner Ljscan Command currently being sent to the gaugeNumber of gauge polls since last reset Number of gauge polls which resulted in an error Out 8315 L&J Tankway Software Description TankGate Interface Installation Safety Guidelines General Safety Guidelines Installation Mounting the TankGate inside the enclosure Mounting the TankGate Select the Unit address Wiring Up PowerInstalling Communications Mounting the Enclosure Establishing Host Communications Power-UpRS-485 Communications Initial system verification Installation TankGate Interface Executing ViewRTU Installing ViewRTUOverview System Requirements ViewRTU Version Selection dialog ViewRTU Menu Bar ViewRTU windowFile Menu Point Menu Edit Select Point to Add dialog boxEdit Point selection dialog Delete Edit Point dialogPoint deletion dialog Download Database to RTU Config MenuUpload Database from TankGate Creating a Password To enter the password Communications Menu Changing the PasswordChanging the Password PC Setup Status Port Communications Setup dialog Connect Options MenuTankGate search dialog Import All Convert Configuration FilesConvert ViewRTU versions dialog Export All Help Menu Using ViewRTU Configuring Single Points Edit Point Window Push-buttons Edit Digital Point dialogMinimize Previous Minimizing the Edit Point WindowConnections Next Edit point parameter value dialog To modify a ValueUpload To modify a value Adding Multiple Points Configuring Multiple PointsTo modify a Reference Edit point parameter reference dialog Adding Multiple Points Spreadsheet Mode Paste Point MenuEdit Menu Copy Set Value Paste & DnldSet Value with Auto Increment Import Options MenuExport Hide Row/Col ViewParameter Type Description Unhide All Creating and Editing Connections Point Connections Window Displaying the Point Connections windowTo create a Connection Using ViewRTU TankGate Interface Indicator Condition Run indicator 1.3 TXD/RXD LEDs Using the TankGate Push-buttonsCommunications indicator LED Displays under Abnormal Conditions Press the Reset button Performing a Hard Reset Set the ID DIP switch to the desired addresses Replacing a defective component or module Maintenance Troubleshooting TankGate Interface 102 Ordering Structure Nema 4 Enclosure Ordering Structure Remote Terminal Unit TankGate Modbus Map Value12 Fpreg 3034 3094 8300 Your official representative Your offical representative