Important InformationNOTICERead these instructions carefully,and look at the equipment to bee familiar with the device before trying to install,operate,or maintainit.The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to callattention to information that clarifies or simplifies a procedure.The addition of this symbol to a Danger or Waming safety label indicates that an electrical hazard exists,which will result inpersonal injury if the instructions are not followed.This is the safety alert symbol.It is used to alert you to potential personal injury hazards.Obey all safety messages that followthis symbol to avoid possible injury or death.A DANGERDANGER indicates an imminently hazardous situation,which,if not avoided,will result in death or serious injury.A WARNINGWARNING indicates a potentially hazardous situation,which,if not avoided,can result in death or serious injury.A CAUTIONCAUTION indicates a potentially hazardous situation,which,if not avoided,can result in minor or moderate injury.CAUTIONCAUTION,used without the safety alert symbol,indicates a potentially hazardous situation which,if not avoided,canresult in property damage.PLEASE NOTEThe word "drive"as used in this manual refers to the controller portion of the adjustable speed drive as defined by NEC.Electrical equipment should be installed,operated,serviced,and maintained only by qualified personnel.No responsibility is assumed bySchneider Electric for any consequences arising out of the use of this material.2009 Schneider Electric.All Rights ReservedBBV2859005/2009Before you beginRead and understand these instructions before performing any procedure with this drive.AA DANGERHAZARD OF ELECTRIC SHOCK,EXPLOSION,OR ARC FLASHRead and understand this manual before installing or operating the ATV303 drive.Installation,adjustment,repair,and maintenancemust be perfomed by qualified personnel.The user is responsible for pliance with all international and national electrical code requirements with respect to grounding of allequipment.Many parts of this drive,induding the printed circuit boards,operate at the line voltage.DO NOT TOUCH.Use only electricallyinsulated tools.DO NOT touch unshielded ponents or terminal strip screw connections with voltage present.DO NOT short across terminals PA/+and PB.Before servicing the drive:Disconnect all power,including external control power that may be present.Place a "DO NOT TURN ON"label on all power disconnects.Lock all power disconnects in the open position.WAIT 15 MINUTES to allow the DC bus capacitors to discharge.Then follow the "Bus Voltage Measurement Procedure"(seeUser manual)to verify that the DC voltage is less than 42 V.The drive LEDs are not indicators of the absence of DC busvoltage.Install and close all covers before applying power or starting and stopping the drive.Failure to follow these instructions will result in death or serious injury.A DANGERUNINTENDED EQUIPMENT OPERATIONRead and understand this manual before installing or operating the ATV303 drive.Any changes made to the parameter settings must be performed by qualified personnel.Failure to follow these instructions will result in death or serious injury.A WARNINGDAMAGED DRIVE EQUIPMENTDo not operate or install any drive or drive accessory that appears damaged.Failure to follow these instructions can result in death,serious injury,or equipment damage.A WARNINGLOSS OF CONTROLThe designer of any control scheme mustconsider the potential failure modes of control paths and,for certain critical control functions,provide a means to achieve a safe state during and after a path failure.Examples of critical control functions are emergency stop and overtravel stopSeparate or redundant control paths must be provided for critical control functions.System control paths may include munication links.Consideration must be given to the implications of unanticipated transmissiondelays or failures of the link.aFailure to follow these instructions can result in death,serious injury,or equipment damage.a.For additional infomation,refer to NEMA ICS 1.1(latest edition),"Safety Guidelines for the Application,Installation,and Maintenanceof Solid State Control and to NEMA ICS 7.1 (latest edition),"Safety Standards for Construction and Guide for Selection,Installation andOperation of Adjustable-Speed Drive Systems."BBV285900520095Documentation structureThe following ATV303 technical documents are available on the Schneider Electric website (www.schneider-electric.).User manualThis manual describes how to install,mission,operate and program the drive.Quick Start sheetThe Quick Start describes how to wire and configure the drive to start motor quickly and simply for simple applications.This document isdelivered with the drive.Modbus Communication manualThis manual describes the assembly,connection to the bus or work,signaling,diagnostics,and configuration of the munication-specific parameters via the 7 segment LED display.It also describes the munication services of the Modbus protocol.This manual includes the main Modbus addresses.It explains the operating mode specific to munication(state chart).ATV303 Parameters ListThe parameter list file include ATV303 all parameters,the printing material is specially considered,which is waterproof.A DANGERUNINTENDED EQUIPMENT OPERATIONRead and understand this manual before installing or operating the ATV303 drive.Any changes made to the parameter settings must be performed by qualified personnel.The excel file does not describe the behaviour of the parameters.Before any modification,refer to the ATV303 User Manual.Failure to follow these instructions will result in death or serious injury.BBV2859005/2009PresentationThe Modbus socket on the ATV303 can be used for the following functions:·Configuration·Settings·ControlThe ATV303 fc drive supports:The 2-ire RS485 physical layerThe RTU transmission modeBBV285900520097Connection to RS485 busConnection to ATV303Connection accessories should be ordered separately (please consult our catalogues).Connect the RJ45 cable connector to the ATV303 connector.Pin out of the ATV303 RJ45 ConnectorView from underneathPinSignal134D1(1)D0(1)678Common (1)(1)Modbus signals(2)Supply for RS232/RS485 converter or a remote terminalProtection against interferenceUse the Schneider Electric cable with 2 pairs of shielded twisted conductors (reference:TSXCSA100,TSXCSA200,TSXCSA500).Keep the Modbus cable separated from the power cables (30 cm (11.8 in.)minimum).Make any crossovers of the Modbus cable and the power cables at right-angles,if necessary.For more infommation,please refer to the TSX DG KBL E manual:"Electromagic patibility of industrial works and fieldbuses".RS485 bus schematicThe RS485 standard allows variants of different characteristics:polarisationline terminatordistribution of a reference potential·number of slaves·length of busThe new Modbus specification published on the Modbus.org site in 2002 contains precise details of all these characteristics.They are alsosummarised in Standard schematic section.The new Schneider Electric devices conform to this specification.BBV2859005/2009Configuration of the Modbus serial portCommunication Menu StructureThe munication parameters are part of the COM-submenu.This menu is accessible as follows:701600-702700-703706·Communication configuration-Parameters decriptionParameter descriptionRange or listed valuesdefaultPossible ValueModbus addressMODBUS address of the drive1to247OFF16#1771=060010:OFF (broadcast only)2474,8 kbpsMODBUS baud rate19.2 kbps19.2 kbps16#1773=0600319.238.4 kbpsMODBUS format801:8 bits,odd parity,1 stop bit.7038E1:8 bits,even parity,1 stop bit.BE I8N1.8 bits,no parity,1 stop bit8E116#1774=060048N2:8 bits,no parity,2 stop bits.日n2MODBUS Time outAdjustable from 0.1 to 30s16#1775=06005Communication scanner submenus Detailed in the next chapterThe behaviour of the ATV303 when a time-out occurs is defined by the 6 /parameter,this parameter can be found in the menu 600-(see User Manual).A WARNINGLOSS OF CONTROLIf Modbus fault management(611)=fault ignore(00),munication control will be inhibited.For safety reasons,inhibition ofmunication fault should only be used for adjustment or special applications purpose.Failure to follow these instructions can result in death,serious injury,or equipment damage.BBV28590052009IO Scanner configuration parametersIntegrated munication scannerThe munication scanner is useful when used in bination by the Modbus dlient device with the function "Read/Write Multipleregisters":23 (0x17),which provides in a single telegram a read multiple registers and a write multiple registers.The detail of the function23 is described in the supported Modbus functionsLocal configuration of the munication scannerThe munication scanner is accessible via the following menus 700-and 705-706-submenus.The 4 output variables and the 4 input variables are assigned by means of parameters 706.0 to 706.3and 705.0 to 705.3.An 70 6 or 70 5 parameter with a value of zero indicates that the parameter is not active.These 8 parameters are described in thetable.NCA or NMA defines the addresses.All these parameters are Modbus eligible addresses.SubmenuOn the local HMI,it is parameter descriptionFactory setting parameterModbus addressAddress of ETA=3201705.0 addressSource drive address of the 1st input word16#0C8116#319D=12701Address of RFRD=8604705.1 addressSource drive address of the 2nd input word16#219C16#319E=12702705.2 addressSource drive address of the 3rd input word016#319F=12703705.3 address0Source drive address of the 4th input word16#31A0=12704Address of CMD=8501706.0 addressDestination drive address of the 1st output word16#213516#31B1=12721Address of LFRD=8602706.1 addressDestination drive address of the 2nd output word16#219A16#31B2=12722706.2 address0Destination drive address of the 3rd output word16#31B3=12723706.3 address0Destination drive address of the 4th output word16#31B4=12724Monitoring the munication scannerIt is also possible to monitor the parameters value that have been configured in the munication scanner.This monitored values areaccessible via the following menus:700-and 70 7-708-submenu.The4 output variable values and the 4 input variable values are located into parameters 708.0to 708.3and 0 7.0to 70 7.3.SubmenuOn the local HMI,it is parameter descriptionFactory setting parameterModbus addressETA value707.0 addressSource drive value of the 1st input word1274116#31C5707.1 addressRFRD valueSource drive value of the 2nd input word1274216#31C6707.2 addressSource drive value of the 3rd input word1274316#31C7707.3 address0Source drive value of the 4th input word1274416#31C8CMD value708.0 addressDestination drive value of the 1st input word1276116#31D9LFRD value708.1 addressDestination drive value of the 2nd input word1276216#31DA708.2 address0Destination drive value of the 3rd input word1276316#31DBDestination drive value of the 4th input word708.3 address1276416#31DC10BBV2859005/2009IO Scanner configuration parametersConfiguration exampleIn this example the munication scanner is configured as follow,706.0,706.I,705.0,705.are used with their defaultvalues.705.2 is configured with the address of n Extended control word (Modbus 8504 16#2138).705.2 isis configured withthe address of E Extended control word (Modbus 3206 16#0C86).How to read the diagram belowExample for 705.2:Communication scanner·submenu3206706.02135706.1②850416￥2138706.30000850116￥2135860216#219A320116#0C81860416￥219C705.0705.705.2705.30000The required telegram to perform the exchange is the Modbus function 23,Obviously a sequence of requests based on Modbus functions03 and 16 is also possible.(See also the chapters Modbus Functions and ATV303 and M218).BBV28590052009Modbus FunctionsModbus ProtocolThe transmission mode used is RTU mode.The frame contains no message header byte,nor end of message bytes.It is defined as follows:SlaveaddressRequest codeDataCRC16The data is transmitted in binary code.CRC16:cyclical redundancy check.The end of the frame is detected on a silence greater than or equal to 3 characters.PrincipleThe Modbus protocol is a master-slave protocol.MasterOnly one device can transmit on the line at any time.The master manages the exchanges and only it can takethe initiative.It interrogates each of the slaves in succession.No slave can send a message unless it is invited to do so.The master repeats the question when there is an incorrectexchange,and declares the interrogated slave absent if noresponse is received within a given time period.If a slave does not understand a message,it sends anexception response to the master.The master may or maynot repeat the request.Slave iSlavejSlave kDirect slave-to-slave munications are not possible.For slave-to-slave munication,the application software must therefore be designed to interrogate a slave and send back data receivedto the other slave.Two types of dialogue are possible between master and slaves:the master sends a request to a slave and waits for its responsethe master sends a request to all slaves without waiting for a response(broadcasting principle)AddressesThe drive Modbus address can be configured from 1 to 247.Address 0 coded in a request sent by the master is reserved for broadcasting.ATV303 drives take account of the request,but do notrespond to it.Supported Modbus functionsThe ATV303 supports the following Modbus functions.Function nameCodeDescriptionRemarksRead holding registers03Read N output wordsMax PDU length 63 words16#03Write one output word06Write one output word16#06Write multiple registers16Write N output wordMax PDU length 61 words16#10Read/write Multiple registers23Read/rite multiple registersMax PDU length 4 words (W),4 words (R)16#17(Sub-function)43/14Encapsulated interface transportRead device ldentification16#2BRead device identification16#0EBBV2859005/2009