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Omron 3G3FV-PDRT1-SIN user manual Locating Terminating Resistors, Total Drop Line Length

Models: 3G3FV-PDRT1-SIN

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CompoBus/D Communications Line Design	Chapter 2

HTotal Drop Line Length

The total drop line length is the total sum length of all the drop lines (but not including the trunk line). Do not exceed the maximum total drop line length (even when the length of each individual drop line is 6 m or less). The standard for the total drop line length varies with the baud rate as shown in the previous table.

HConfiguration Example

The following configuration example shows the maximum length of the Network, the drop line lengths, and the total drop line length.

Terminating Resistor

Trunk line 10 m

2m

Node

Trunk line 10 m

3 m

6 m

Node

Trunk line 20m

Terminating

Resistor

2 m

Node

2 m

1 m

Node

1 m

1 m	2 m	2 m		Node	6 m	6 m	6 m
1 m	2 m	2 m			6 m	6 m	6 m

Node

Node

Node

Node

Node

Node

Drop line	Drop line	Drop line	Drop line
2m	5 m	6 m	6 m

Maximum Network Length

Drop Line Length

Total Drop Line Length

The longest distance between nodes is 48 m, and the distance between the two Terminating Resistors is 40 m. The maximum Network length is therefore 48 m.

There are four branch points in the trunk line. The length of each drop line is shown in the diagram. The maximum drop line length is 6 m.

The sum of all the drop lines is 40 m.

2-2-2 Locating Terminating Resistors

Be sure to connect the Terminating Resistors at both ends of the trunk line to reduce signal reflection and stabilize communications.

When there is a T-branch Tap 6 m or less from the end of the trunk line (or the node):

A Terminating Resistor attached to a T-branch Tap can easily be mounted without taking up much space.

When there is not a T-branch Tap 6 meters or less from the end of the trunk line (or the node):

A Terminating Resistor must be connected before that point. Either a T-branch Tap mounted to a Terminating Resistor or a terminal block with Terminating Resistor can be used. In this case, be sure to make the cable length 1 m or less from the node to the Terminating Resistor.

1 m or less

Truck line

T-branch Tap mounted to a Terminating Resistor

or a terminal block with Terminating Resistor.

Node

Node at end of trunk line

2-5

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Omron 3G3FV-PDRT1-SIN user manual Locating Terminating Resistors, Total Drop Line Length, Configuration Example

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 Communications with Sysmac C200HX/HG/HE and CV-series PCs FunctionsEasy Communications Choice of Communications Functions Multi-vendor NetworkRemote I/O function Output PC to 3G3FV Applicable to Various System ConfigurationsConnect Multiple PCs to the Same Network CompoBus/D FeaturesSystem Configuration Example Simultaneous Remote I/O and Message ServicesHandle 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 SpecificationsInverter CompoBus/D Communications SpecificationsSpecifications ChapterC200HS Communications without Configurator Fixed AllocationCommunications with Configurator Free Allocation Applicable PC CV SeriesDM Area cannot be manipulated by bit, so it cannot be allo Chapter CompoBus/D Communications Line Design Network Components Network Configuration OverviewBranching Patterns from Trunk Line ConnectionsTrunk and Drop Lines Branching PatternsMaximum Network Length Network Configuration RestrictionsBaud Rate and Communications Distance Maximum Communications DistanceTotal Drop Line Length Configuration ExampleLocating Terminating Resistors 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 LocationDistance m 100 Max. current a Thick CableThin Cable Calculation Example Calculating the Best Location of the Actual NodesCountermeasures Left Side Equation FormulaeInternal Circuitry of the Power Supply Tap Splitting the System into Multiple Power SuppliesSplitting the Power Supply System Power Supply Tap ConfigurationRestrictions Dual Power SuppliesGrounding the CompoBus/D Communications Card Communications Line Noise PreventionGrounding the Network Grounding the NetworkCommunications Cable Shielding Communications Power Supply Noise PreventionCommunications Power Supply Switching Power Supply ConfigurationSuspending the Communications Power Supply Noise Prevention WiringNoise Prevention for Peripheral Devices Chapter Setup and Wiring Display Sticker color Code Cable color Details Nomenclature and Settings Names of PartsTerminal Block Indicator Display Meaning Color Status Operation IndicatorsPin Kbps Baud Rate and Node Address SettingsBaud Rate Setting Pins Node Address Setting PinsMounting Procedure Front View Side View Communications Cable WiringConnecting Communications Cables CompoBus/D Communications Card Crimp Terminal Inverter Internal WiringConnecting Communications Cables to T-branch Taps DCN1-3C T-branch Tap Branch Tap ConnectorsDCN1-1C T-branch Tap Terminal-block Terminating Resistor Connecting Terminating ResistorsBranch Tap Terminating Resistor Chapter CompoBus/D System Startup Overview and Restrictions of Word Allocations Fixed Allocation Without ConfiguratorFree Allocation With Configurator Sysmac Word Allocations and Scan ListFree Allocation Restrictions Scan ListsScan List Free Remote I/O Allocations Scan List ApplicationCreating Scan Lists Fixed Remote I/O AllocationsAllocation Areas for Different PCs Using Scan ListsFixed Word Allocations CIO 1900 to CIO 2000 to IR 50 to IR IR 350 to IR 399 381 O Allocations and ErrorsSetup Error I/O Area Overlap Setup Error I/O Area Range ViolationFixed Allocation Example Basic Application ProcedureVerification Error Slave I/O Size Differs Chapter Allocation Areas and Maximum Words for Different PCs Free AllocationsWrong Free Allocation RestrictionsExample of Free Allocations Chapter Constant Content SEQ indicator Digital Operator Sysdrive 3G3FV SettingsInverter Run Command Selection Constant Content REF 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 Classification Word address Bits 15 to Inverter Run CommandsWords Allocated to Sysdrive 3G3FV-series Inverters Inverter StatusRotational Speed Monitor Data Rotational Speed Reference DataStandard Remote I/O Types of Remote I/O OperationBasic Remote I/O Inputs 3G3FV to Sysmac PC Instance ID 150 Dec 96 Hex Special Remote I/OInputs 3G3FV to Sysmac PC Instance ID 71 Dec 47 Hex Outputs Sysmac PC to 3G3FV Instance ID 100 Dec 64 HexTypes of Message Communications Message Communications DeviceNet Explicit MessagesMessage Communications Operations Overview of Explicit Messages Using IowrSending and Receiving Messages with C200HX/HG/HE PCs Word address Bits 15 to Control CodeBeginning Source Word Destination InformationMessage Timing Flag Functions Timing of Message Response ReadingCommunications Flags Beginning Response Storage Word Using CMND194Beginning Command Storage Word Sysmac CV-series Message TransmissionWord address Bits 14 to Message Response Read TimingBeginning Control Code Word Overview of Messages and Responses Command FormatType Name Address Content Word Bit Response Format Support Service CodeMotor Data Objects Class 28 Hex Object Details Support Service CodesControl Supervisor Objects Class 29 Hex 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 OperationData Setting Example Switching via Connection ObjectsConnection Objects for Switching Remote I/O Operations Restrictions on Switching Remote I/OChapter Function Codes Special Remote I/O OperationOverview of Special Remote I/O Words Used for Special Remote I/OData type Transmission Inverter operation Remarks Setting Data for Operations and Parameter ConstantsEnabling Parameter Setting Data by Enter Command Matching Function Codes and Register Numbers Error code ContentSpecial Remote I/O Communications Timing Special Remote I/O ResponsesHandling Illustration Register No. hex Function Content Read WriteInputting Control/Frequency Inverter Outputs Register Number 0009 Hex Inverter Run Commands Register Number 0000 HexBit Content Operator Status Register Number 0011 Hex Register number hex Function Content Read WriteInverter Monitoring Functions Inverter Status Register Number 0010 HexBit Display Content Fault 1 Register Number 0014 HexFault 2 Register Number 0015 Hex Fault 3 Register Number 0016 HexAlarm 2 Register Number 001A Hex CPF Error 1 Register NumberCPF Error 2 Register Number 0018 Hex Alarm 1 Register Number 0019 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 CodesApplication b Parameter Constants Constants for Initialize ModeParameter Constants for Program Mode Parameter Constant Reading and WritingChapter 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 Indicator Display Meaning Countermeasures Color Status Communications Line ErrorsOperation Indicators Chapter Be lit in red Error Meaning Countermeasures Code Message Communications ErrorsExplicit Message Errors Error Code Meaning Special Remote I/O ErrorsSpecial Remote I/O Errors Enter CommandMemory Data Backup Inverter FaultsDetecting Inverter Faults Confirming Inverter Fault StatusChapter Communications Remote I/O Inputs from 3G3FV Inverter to PC Words m and m + Standard Remote I/O ProgrammingAllocations 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 Word Function Special Remote I/O Programs Simple Operation ProgramsInverter Control Input Word Allocation Inverter Status Word AllocationClassification Word address 15 to Program-related Bits UsedInverter Control Input Remote I/O Allocation AreasTiming 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 singleByte Bit Assembly Objects Class 04 HexAllocation Information Details DeviceNet Connection Objects Class 05 Hex Chapter Chapter Chapter More than One Master in Network CompoBus/D Communications Response TimeCommunications Cycle Time One Master in NetworkInverter I/O response time O Response Time of InverterIndex Index Index Index Revision History