User`s Manual
Contents
1. The VJET has Link LED lower side and Activity LED upper side on the connector part of the front These LEDs turn on in green or amber see the External Dimensions Link LED Lower side Activity LED Upper side 10 Mbps HalF Duplex 100 Mops FulrDuplex A IMPORTANT Use of the product ignoring the specifications may cause overheating or damage Before turning on the power ensure the following a Power supply voltage and input signal value applied to the product should meet the required specifications b The external wiring to the terminals and wiring to ground are as specifications Do not operate the product in the presence of flammable or explosive gases or vapors To do so is highly dangerous The product is sensitive to static electricity exercise care in operating it Before you operate the product touch a nearby metal part to discharge static electricity The power line and input output signal lines should be installed away from noise generating sources Otherwise accuracy cannot be guaranteed The grounding resistance must be 100 2 JIS Class D grounding The length and thickness of the grounding cable should be as short and thick as possible Directly connect the lead from the ground terminal terminal no 8 of the product to the ground Do not carry out daisy chained inter ground terminal wiring Power Supply and Isolation Power Supply Rated Voltage 24 V DC or 100 240 V AC DC 50 60 Hz Powe2. Data length 8 bits O Stop bit 1 bit O The Unit ID specified for sending by a host device and the Unit ID of the connected RS 485 con nection device are consistent The parity is consistent between VJET and RS 485 connection device The same Unit ID is not set for the devices connected to the same communication line The port number is correct TRADEMARKS Windows 98 2000 XP and Windows NT4 0 are registered trademarks of Microsoft Corporation USA Ethernet is registered trademark of XEROX corporation MOO Oo LO IM 77J01E11 01E 3rd Edition Dec 20 2005 00
3. Function code The command specified from the host device Data Depending on the function code D register addresses the number of individual D registers or parameter values are specified in this position 7 4 List of Function Codes List of Function Codes The codes in the following list are command words host devices use to acquire information from the internal registers D registers of RS 485 connection devices Code Number 03 Reads data from multiple registers Writes data to registers Loop back test Writes data to multiple registers For details refer to the Communication Functions user s manual of each RS 485 connection device 8 EXAMPLE OF COMMUNICATION PROGRAM This chapter shows a sample program to read write data operating by Microsoft Visual Basic 6 0 The program shown here is for your reference when you create a program All operation is not guaran teed LTT LLL TY i Example of VJET Communication Procedure by Microsoft Visual Basic 6 0 Procedure to read the input value of VJU7 Address 01 via VJET from LAN port of a PC Connect and send command by Connect SendData of Winsock control and receice data by DataArrival event Procedure to connect to VJET by TCP IP create command and send the command PC o o ee ee Ethernet l VJET IP Adr 192 168 1 101 i VJU7 Address 01 RS485BUS VJU7 Address 02 The following procedure is described using the real numbers and rea
4. VJET JUXTA Ethernet RS 485 Converter User s Manual Please read through this User s Manual before use for correct handling Please keep this User s Manual for future reference YOKOGAWA Yokogawa Electric Corporation IM 77J01E11 01E 1st Edition July 2004 YK 3rd Edition Dec 2005 YK 1 CAUTIONARY NOTES FOR SAFE USE OF THE PRODUCT This User s Manual should be carefully read before installing and operating the product The follow ing symbol is used on the product and in this manual to ensure safe use A If this symbol is indicated on the product the operator should refer to the explanation given in the user s manual in order to avoid injury or death to either themselves or other personnel and or damage to the instrument The manual describes the special care the operator should exercise to avoid shock or other dangers that may result in injury or loss of life The following symbols are used only in this manual A IMPORTANT Indicates that operating the hardware or software in a particular manner may damage it or result in a system failure AN NOTE Draws attention to information that is essential for understanding the operations and or features of the products 2 GENERAL The VJET is a compact plug in type communication converter It can be connected to the host de vices with Ethernet by Modbus TCP protocol and to the instruments with RS 485 by Modbus RTU protocol Model a
5. fixing the main unit Mounting Dimensions Main unit Unit mm 29 5 or more 2 M4 or 2 4 5 or more Main fansi unit fixing en Mounting screws CHECKING PRODUCT SPECIFICATIONS AND PACKAGED ITEMS 1 Checking the Model and Product Specifications Check that the model and specifications indicated on the nameplate attached to the side face of the main unit are as ordered 2 Packaged Items Check that the packing carton contains the following items VJET 1 Tag number label 1 sheet Terminator 1 When option code R220 is specified User s Manual this manual IM 77J01E11 01E 1 copy Yokogawa Electric Corporation Network Solutions Business Divisiion 2 9 32 Naka cho Musashino shi Tokyo 180 8750 Japan Phone 81 422 52 7179 Facsimile 81 422 52 6793 4 2 DIN Rail Mounting DIN Rail Mounting Insert a DIN rail into the upper part of the DIN rail groove on the rear of the socket and then slide the slide lock at the lower part of the socket upwards until the socket is fixed into position as shown be low DIN rail Fit into here DIN rail or IS DIN rail Slide lock 4 3 Mounting Using a Multi mounting Base When using a multi mounting base see the User s Manual for VJCE 01A VJ Mounting Base for communication IM 77J01C51 11E 4 4 Using a Duct Using a Duct When using a wiring duct install the duct at leaset 30 mm away from the top and bottom faces of th
6. Hex AscB MidB varReceive 1 1 2 strReceive strReceive amp strHex 1 Next i Received data character string are stored in strReceive Example of received characters strReceive from VJU7 Instrument range 0 to 1000 C Input value 680 2 C 1234 0000 000B 01 03 08 1A92 0001 02A8 0003 of D0005 register data Unit 3 C D004 register data Input value 02A8h 680 68 0 D0003 register data Number of digits below decimal pont 1 D0002 register data Input value 1A92h 6802 680 2 Data amount bytes 8 bytes Function code 03 Read data from mutiple registers RS 485 connection device address Address 1 The number of send data bytes after RS 485 connection device address 000Bh 11 bytes Fei Protocol ID 0000 fixed ea Transaction ID The value when sending 1234 command Cut TCP connection Winsock1 Close ALLL LLL LTT TTY IM 77J01E11 01E 8rd Edition Dec 20 2005 00 9 TROUBLESHOOTING If the devices can not communicate each other perform the following checks All devices related to the communication are turned on The wiring is correct The VJ series with Output 2 other than communication is not connected The number of connected devices and connecting distance are within the use range The communication conditions of RS 485 connection device are as follows O Protocol Modbus RTU O Baud rate 9600 bps
7. connection devices the process data from each RS 485 connection device stored in the VJET may be delayed to the actual process In this case turn off the function 2 The setting rang for the port number PRT is as follows 502 1024 to 65535 decimal number 01F6 0400 to FFFF hexadecimal number 7 COMMUNICATION OVERVIEW 7 1 Communication Specifications Ethernet Specifications Interface Conforms to IEEE802 3 1OBASE T 100BASE TX Port number for Modbus TCP protocol 502 Host devices PC etc MODBUS TCP TCP Application layer Transport layer Network layer Data link layer Physical layer Ethernet 10BASE T 100BASE TX Access control CSMA CD Transfer rate 10 Mbps 100 Mbps Maximum segment length 100 m the length between Hub and converter Maximum connecting configuration Up to 4 cascade connections per hub 10BASE T up to 2 cascade connections per hub 100BASE TX Communication parameter settings High speed response mode parity IP address subnet mask default gateway and port number via Ethernet using the dedicated tool RS 485 Specifications Interface Conform to EIA RS 485 Protocol Modbus RTU Transfer system Half duplex communication Synchronous system Start stop synchronization Transfer rate 9600 bps Parity Even odd or none Stop bit 1 bit Data length 8 bit 7 2 TCP IP Communication Modbus TCP exchanges data with the protocol shown in the figure below using a TCP IP
8. socket in terface PC RS 485 connection devices p Signal Conditioners JUXTA series o Controllers LL 7SN GREEN series lJ UT100 series Power Monitors First startup First startup AER enon Open connection Terminate connection AK NOTE If no request is received from the host device for more than 60 seconds after establishing a connection the VJET will automatically terminate the connection IM 77J01E11 01E 8rd Edition Dec 20 2005 00 7 3 Network Frame Structure The Modbus TCP frame structure is as follows Modbus TCP IP ADU E E PDU MBAP Header Modbus Application Protocol Header Header used to identify the the Modbus TCP protocol PDU Simple Protocol Data Unit Body of the data communication 7 3 1 MBAP Header Structure The MBAP Header Modbus Application Header consists of the following seven bytes ons ol 2 e elsle Description Transaction ID Protocol ID Number of bytes e Transaction ID The host device specifies an arbitrary value to identify a trasaction The VJET returns the value it received from the host device as its response This parameter is set to 0 to indicate the Modbus TCP protocol Number of bytes The number of bytes from the Unit ID byte number 6 byte on Unit ID Unit ID of RS 485 connection device 7 3 2 PDU Structure The PDU Simple Protocol Data Unit consists of the following n bytes yen o Trom Protocol ID
9. dministrators group The program dose not start normally if the user name not belonging to the Administrators group is used for logging on 1 Start Windows 2 Download the VJET setting tool from the following URL http www yokogawa com ns cis field ns vjet_02 htm Note The setting tool of old version may not be able to set the VJET settings Download the newest version of the setting tool from the URL above to use it 3 Please extract a compressed file and perform SETUP EXE 4 To continue follow the instructions appearing on screen After the installation is completed the VJET setting tool is added to the Programs submenu of the Start menu of Windows 6 3 VJET Setting Tool Basics VJET Setting Tool Basics 1 Set the network settings of the personal computer For initial setup connecting a VJET and a PC using cross cable is recommended Ask the sys tem administrator for the settings and contents 2 From the Start menu of Windows point to the Programs submenu then VJET Setting Tool and click VJET Setting Tool 3 The VJET Setting Tool then starts and the dialog box below appears wb foo al E E all 4 The connected VJET is displayed If the VJET is connected after starting the tool click Tool on the Menu bar and then choose Research 5 Choose the VJET of which the setting are to be changed from the displayed VJET If multiple VJET are displayed identify them by Mac address Mac address The sea
10. e main unit 5 EXTERNAL WIRING A WARNING To avoid the risk of an electric shock turn off the power supply and use a tester or similar device to ensure that no power is supplied to a cable to be connected before carring out wiring work Wiring should be connected to the terminals on the socket of the product The terminals for external connections are of M3 screws Use crimp on terminal lugs for connections to the terminals Recommended cables A nominal cross sectional area of 0 5 mm or thicker for signal cables that of 1 25 mm or thicker for power cables and that of 0 5 mm or thicker of twisted pair cables with a shield for communication cable lerminator eA RS 485 communication Qs N _ _ N D Power supply Connet the VJET to the host device using either 10BASE T or 100BASE TX The VJET detects 10BASE T or 100BASE TX automatically 10BASE T 100BASE TX are 10 Mbps 100 Mbps Ethernet standard using twisted pair cables In 10BASE T 100BASE TX networks personal computers and other host devices are connected in a star pattern through a hub Devices that can be connected to Ethernet Touch panel HUB sivtetvielell Ethernet Terminator ar Activity LED Connector for 1OBASE T 100BASE TX Link LED
11. l character strings for explanation Check error processing and retry processing in normal conditions are omitted The program does not operate only by this procedure Please make it the refernce at the time of actual application creation LILLE TTT TY Variable declaration Option Explicit Dim strSendData As String Sending data Dim strReceive As String Received data Dim binChrs 11 As Byte Store binary data Dim i As Integer Variable declaration Private Sub cmdSend Procedure to connect to VJET by TCP IP create command and send the command Variable declaration Dim sChr2 As String Dim varChrs As String Set properties of Winsock control Winsock1 Protocol sckTCPProtocol Set protocol used for TCP connection Winsock RemoteHost 192 168 1 101 Set IP address of VJET Winsock1 RemotePort 502 Set a port of VJET 502 default Request TCP connection of VJET Winsock Connect Request TCP connection Do Until Winsock1 State sckConnected Wait for the comletion of connection i DoEvents Loop Create sending data Create command to read input value data and D register addresses from D0002 to D0005 of VJU7 Ad dress 01 connected to RS 485 of VJET D0002 Input value engineering unit D0003 Number of digits below decimal popint D0004 Input value ratio of input to span D0005 Unit of input value engineer ing unit strSendData 123400000006010300010004 Sending command cha
12. l showing the 12 digit alphanumeric character is attached to the sideface of the VJET main unit 6 From the Tool click Upload from VJET The dialog box below appears HP igh ower pa isc ik we PP Seti Sea ir hih DS wa arj SS Tea bes Parad Aa hia Get HEH gh Speers Perri 0b berti 7 Change the settings for High speed response mode Parity IP address Subnet mask Default gateway and port number 2 and then click OK The settings are changed and the first dialog box appears It takes about 10 seconds to change the settings 8 The change of settings is completed if the changed settings are displayed in the first dialog box Factory set defaults High speed response mode 0 OFF 1 Parity 1 Even IP address 192 168 1 1 Subnet mask 255 255 255 0 Default gateway 0 0 0 0 Port number 502 1 The High speed Response Mode improves the response performance of reference numbers 40001 to 40025 of RS 485 connection devices The Mode can be set to a maximum of eight de vices Setting the number of devices using the VJET setting tool applies the Mode to the connec tion devices for Unit ID 1 to the set number The period to read the process data from RS 485 connection devices cannot be specified The VJET automatically reads the process data at the highest speed corresponding to the number of RS 485 connection devices for which this function High speed Response Mode is used If the function is used for many RS 485
13. nd Suffix Codes VJET 01LJ 1000 L Model Power supply 3 24V DC 10 6 100 240 V AC DC Operating range 85 to 264V AC DC Options R220 Attachment of a terminator 2200 SN Without socket 3 INSTALLATION LOCATIONS Avoid the following environments for installation locations Areas with vibration corrosive gases dust water oil solvents direct sunlight radiation a strong electric field and or a strong magnetic field lf there is any risk of a surge being induced into the power line and or signal lines due to lightning or other factors a dedicated lightning arrester should be used as protection for both this unit and a field installed device Environmental Conditions Operating temperature range 0 to 50 C Operating humidity range 5 to 90 RH no condensation Ambient Condition Avoid installation in such environments as corrosive gas like sulfide hydrogen dust sea breeze and direct sunlight Installation altitude 2000m or less above sea level 4 MOUNTING METHOD A IMPORTANT When using the VJET for side by side multiple mounting mount the VJET in either the left or right end of the mounted instruments 4 1 Wall Mounting Wall Mounting Loosen the main unit fixing screw of the product and pull out the main unit from the socket Fix the socket on the wall with screws Next insert the main unit into the socket and fasten the main unit with the main unit fixing screw Socket Threaded hole for
14. r Supply Input Voltage 24 V DC 10 or 100 240 V AC DC x 15 10 50 60 Hz Power consumption 1 8 W at 24 V DC 1 5 W at 110 V DC 2 6 VA at 100 V AC 4 0 VA at 200 V AC Insulation resistance 100 MQ minimum at 500 V DC between Ethernet RS 485 power supply and grounding terminals mutually Withstanding voltage 1000 V AC for one minute between Ethernet and RS 485 terminals mutually 2000 V AC for one minute between Ethernet RS 485 power supply and grounding terminals mutually 6 SETTING PARAMETERS 6 1 Operating Enviroment Personal computer IBM PC AT compatible model that can run Microsoft Windows 98 2000 XP or Microsoft Windows NT4 0 Operating system Windows 98 2000 Professional XP Home Edition Professional or Windows NT4 0 Service Pack 3 or later CPU 300 MHz pentium processor or superior is recommended Main memory 128 MB minimum for Windows 98 2000 XP or 24 MB minimum for Windows NT4 0 is recommended Hard disk Memory space required to store the tool s programs 10 MB minimum Memory space required to store the parameter data 2 MB minimum CRT display 800 x 600 pixels or superior Smaller fonts should be used Should be capable of handing at least 256 colors Network 10BASE T 100BASE TX required for Ethernet communication 6 2 Installation Taeleiicela AN NOTE Before installing the tool quit all running applications When using Windows 2000 or XP Log on using the user name of A
15. racter string Explanation of command character string 1234 0000 0006 01 03 0001 0004 Number of D register 4 0 D register start number D0002 Funcion code 03 Read data from multiple registers RS 485 connection device address Address 1 The number of sending data bytes after RS 485 connection device address 6 bytes Protocol ID 0000 fixed 0 Transaaction ID 1234 Arbitrary value of 2 bytes varChrs StrConv strSendData vbFromUnicode To change sending command character string into bi nary data For i 1 To 12 Change every two character strings into Unicode and arrange them to store in binDhrs sChr2 MidB varChrs 2 i 1 2 binChrs i 1 CByte amp H amp StrConv sChr2 vbUnicode Next i Send sending command binChrs to VJET Winsock1 SendData binChrs Private Sub Winsock1 DataArrival ByVal bytesTotal As Long Receive data from VJET DataArrival of Winsock and cut connection with VJET Variable declaration Dim strData As Byte Dim strHex1 As String Dim strReceive As String Dim varReceive As String Receive data from VJET Winsock1 GetData strData Get received data of Winsock1 control into strData Change received binary data strings to character strings For i 0 To bytesTotal 1 varReceive varReceive amp ChrB strData 1 Next i For i 1 To LenB varReceive strHex1 Right 0 amp
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