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Omron 3G3FV-PDRT1-SIN user manual Communications Line Noise Prevention, Grounding the Network

Models: 3G3FV-PDRT1-SIN

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CompoBus/D Communications Line Design	Chapter 2

2-4 Communications Line Noise Prevention

2-4-1 Communications Line Noise

The communications line sends and receives high-speed pulse signals, and checks whether the data is correct by checking the sequence of the signals. If the amount of noise on the communications line is too great, the interference will alter the communications signal data, and communications will be impossi- ble. Communications lines are more sensitive and require higher speeds than normal I/O lines, so be sure that noise does not interfere with communications. Use the preventative noise countermeasures described here when configuring the system to ensure smooth system start up.

2-4-2 Grounding the Network

HGrounding the Network

The CompoBus/D Network must be grounded at only one location so that a ground loop is not created. The ground should also be connected as close as possible to the center of the Network. Connect the cable shield to the ground terminal on the communications power supply and then connect to a ground of 100 Ω max., as shown in the following diagram.

	Power Supply Tap
V+		V+
CAN H		CAN H
Shield		Shield	Communications
CAN L		CAN L	cable
CAN L		CAN L
V–		V–
Ground	V–	V+
terminal

FG V– V+ Communications power supply

Ground (100 Ω max.)

If more than one communications power supply is connected to the same Network, ground only the one nearest the center of the Network. Do not connect the shield wire at the other power supplies.

Note	1.	Always ground the communications cable shield at one and only one location in the Network.
Note	2.	Always ground to 100 Ω or less.
Note	3.	Always use a separate ground. Never use the same ground as for Inverters or other drive
		system devices.

HGrounding the CompoBus/D Communications Card

The CompoBus/D Communications Card should be grounded according to DeviceNet recommenda- tions installing a noise filter as shown in the following diagram. The ground is normally wired to the ground terminal (12 (G)).

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Omron 3G3FV-PDRT1-SIN user manual Communications Line Noise Prevention, Grounding the Network

Contents

For Sysdrive 3G3FV High-function General-purpose Inverters USER’S ManualItems to Check Before Unpacking  Omron Omron Product ReferencesInstallation and Wiring Precautions Adjustment Precautions Table of Contents CompoBus/D Communications Card Operations Chapter Functions and System Configuration Functions Easy CommunicationsCommunications with Sysmac C200HX/HG/HE and CV-series PCs Choice of Communications Functions Multi-vendor NetworkRemote I/O function Output PC to 3G3FV Applicable to Various System ConfigurationsSystem Configuration Example CompoBus/D FeaturesSimultaneous Remote I/O and Message Services Connect Multiple PCs to the Same NetworkHandle Slaves with Different Response Speeds Free Remote I/O AllocationFixed Allocation Configuration without a Configurator CompoBus/D System ConfigurationFree Allocation Configuration with a Configurator Configurator Overview3G8F5-DRM21 3G8E2-DRM21 Configurator SpecificationsSpecifications CompoBus/D Communications SpecificationsChapter InverterCommunications with Configurator Free Allocation Communications without Configurator Fixed AllocationApplicable PC CV Series C200HSDM Area cannot be manipulated by bit, so it cannot be allo Chapter CompoBus/D Communications Line Design Network Components Network Configuration OverviewTrunk and Drop Lines ConnectionsBranching Patterns Branching Patterns from Trunk LineBaud Rate and Communications Distance Network Configuration RestrictionsMaximum Communications Distance Maximum Network LengthConfiguration Example Locating Terminating ResistorsTotal Drop Line Length Basic Concept Power Supply Location Patterns FlowchartLocating the Nodes on Both Sides of the Power Supply Calculating the Power Supply Location Setting the Power Supply LocationThick Cable Thin CableDistance m 100 Max. current a Calculating the Best Location of the Actual Nodes CountermeasuresCalculation Example Left Side Equation FormulaeSplitting the Power Supply System Splitting the System into Multiple Power SuppliesPower Supply Tap Configuration Internal Circuitry of the Power Supply TapRestrictions Dual Power SuppliesGrounding the Network Communications Line Noise PreventionGrounding the Network Grounding the CompoBus/D Communications CardCommunications Power Supply Communications Power Supply Noise PreventionSwitching Power Supply Configuration Communications Cable ShieldingSuspending the Communications Power Supply Noise Prevention WiringNoise Prevention for Peripheral Devices Chapter Setup and Wiring Nomenclature and Settings Names of Parts Terminal BlockDisplay Sticker color Code Cable color Details Indicator Display Meaning Color Status Operation IndicatorsBaud Rate Setting Pins Baud Rate and Node Address SettingsNode Address Setting Pins Pin KbpsMounting Procedure Communications Cable Wiring Connecting Communications CablesFront View Side View CompoBus/D Communications Card Crimp Terminal Inverter Internal WiringConnecting Communications Cables to T-branch Taps Branch Tap Connectors DCN1-1C T-branch TapDCN1-3C T-branch Tap Connecting Terminating Resistors Branch Tap Terminating ResistorTerminal-block Terminating Resistor Chapter CompoBus/D System Startup Free Allocation With Configurator Fixed Allocation Without ConfiguratorSysmac Word Allocations and Scan List Overview and Restrictions of Word AllocationsScan Lists Scan ListFree Allocation Restrictions Creating Scan Lists Scan List ApplicationFixed Remote I/O Allocations Free Remote I/O AllocationsUsing Scan Lists Fixed Word AllocationsAllocation Areas for Different PCs Setup Error I/O Area Overlap O Allocations and ErrorsSetup Error I/O Area Range Violation CIO 1900 to CIO 2000 to IR 50 to IR IR 350 to IR 399 381Basic Application Procedure Verification Error Slave I/O Size DiffersFixed Allocation Example Chapter Allocation Areas and Maximum Words for Different PCs Free AllocationsWrong Free Allocation RestrictionsExample of Free Allocations Chapter Inverter Run Command Selection Sysdrive 3G3FV SettingsConstant Content REF indicator Digital Operator Constant Content SEQ indicator Digital OperatorConstant Name Content Setting Default Range Operator display CompoBus/D Communications SettingsConstant Content Frequency Reference Settings and Display UnitsStartup Procedure Chapter CompoBus/D Communications Card Operations Remote I/O Standard Remote I/O Initial Setting Words Allocated to Sysdrive 3G3FV-series Inverters Inverter Run CommandsInverter Status Classification Word address Bits 15 toRotational Speed Monitor Data Rotational Speed Reference DataTypes of Remote I/O Operation Basic Remote I/OStandard Remote I/O Inputs 3G3FV to Sysmac PC Instance ID 71 Dec 47 Hex Special Remote I/OOutputs Sysmac PC to 3G3FV Instance ID 100 Dec 64 Hex Inputs 3G3FV to Sysmac PC Instance ID 150 Dec 96 HexMessage Communications DeviceNet Explicit Messages Message Communications OperationsTypes of Message Communications Using Iowr Sending and Receiving Messages with C200HX/HG/HE PCsOverview of Explicit Messages Beginning Source Word Control CodeDestination Information Word address Bits 15 toMessage Timing Timing of Message Response Reading Communications FlagsFlag Functions Beginning Command Storage Word Using CMND194Sysmac CV-series Message Transmission Beginning Response Storage WordMessage Response Read Timing Beginning Control Code WordWord address Bits 14 to Command Format Type Name Address Content Word BitOverview of Messages and Responses Support Service Code Motor Data Objects Class 28 HexResponse Format Support Service Codes Control Supervisor Objects Class 29 HexObject Details Chapter DeviceNet error code Operator display Meaning Fault Codes7 AC/DC Drive Objects Class 2A Hex Depending on the acceleration Communications Data Setting Examples Communications Data Reference Example Switching via Parameter Objects Using the Configurator Switching Remote I/O OperationConnection Objects for Switching Remote I/O Operations Switching via Connection ObjectsRestrictions on Switching Remote I/O Data Setting ExampleChapter Overview of Special Remote I/O Special Remote I/O OperationWords Used for Special Remote I/O Function CodesSetting Data for Operations and Parameter Constants Enabling Parameter Setting Data by Enter CommandData type Transmission Inverter operation Remarks Special Remote I/O Communications Timing Error code ContentSpecial Remote I/O Responses Matching Function Codes and Register NumbersRegister No. hex Function Content Read Write Inputting Control/FrequencyHandling Illustration Inverter Run Commands Register Number 0000 Hex Bit ContentInverter Outputs Register Number 0009 Hex Inverter Monitoring Functions Register number hex Function Content Read WriteInverter Status Register Number 0010 Hex Operator Status Register Number 0011 HexFault 2 Register Number 0015 Hex Fault 1 Register Number 0014 HexFault 3 Register Number 0016 Hex Bit Display ContentCPF Error 2 Register Number 0018 Hex CPF Error 1 Register NumberAlarm 1 Register Number 0019 Hex Alarm 2 Register Number 001A HexInverter Monitoring U1-jj Operating Status Register Number 002B Hex Output Terminal Status Register Number 002A HexInverter Monitoring U2-jj, U3-jj Code Display Content Error CodesParameter Constants for Program Mode Constants for Initialize ModeParameter Constant Reading and Writing Application b Parameter ConstantsChapter Tuning C Parameter Constants Vector control default settings will be displayed Motor Constant E Parameter Constants Command-related d Parameter ConstantsFmax Those given PGO Option F Parameter ConstantsExternal Terminal Function H Parameter Constants Protective Function L Parameter Constants Chapter Operator o Parameter Constants Chapter Communications Errors Communications Line Errors Operation IndicatorsIndicator Display Meaning Countermeasures Color Status Chapter Be lit in red Message Communications Errors Explicit Message ErrorsError Meaning Countermeasures Code Special Remote I/O Errors Special Remote I/O ErrorsEnter Command Error Code MeaningDetecting Inverter Faults Inverter FaultsConfirming Inverter Fault Status Memory Data BackupChapter Communications Standard Remote I/O Programming AllocationsRemote I/O Inputs from 3G3FV Inverter to PC Words m and m + Operation Timing ChartLadder Program Message Communications Programming Inverter Fault Processing Timing Chart Sets the node address Checks the message response Reading/Writing DataResponse data storage area Command code Completion code storage Ladder Program Checks Fins end code Inverter Control Input Word Allocation Special Remote I/O Programs Simple Operation ProgramsInverter Status Word Allocation Word FunctionInverter Control Input Program-related Bits UsedRemote I/O Allocation Areas Classification Word address 15 toTiming Chart Chapter Sets frequency reference Chapter Allocation Reading Parameter DataClassification Word 15 to Transfers read data to DM Writing Parameter Data Forms no processing, to disable the enter command Sets enter command From previous Chapter Appendices 3G3FV-PDRT1-SIN SpecificationsIdentify Objects Identification Information Class 01 Hex ObjectsStatus Details Message Router Objects Class 02 HexDeviceNet Objects Class 03 Hex Service Code No. Hex Get attribute singleAssembly Objects Class 04 Hex Allocation Information DetailsByte Bit DeviceNet Connection Objects Class 05 Hex Chapter Chapter Chapter Communications Cycle Time CompoBus/D Communications Response TimeOne Master in Network More than One Master in NetworkInverter I/O response time O Response Time of InverterIndex Index Index Index Revision History