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1 Introduction
2 Features
3 Dip-switch function
4 Setup PC Connection
5 Test Board Connection Using PING Command
6 Connect the Board to Your LAN
7 GFX4-ETH's Modbus TCP/IP implemented command
80403B_MSW_GFX4-ETHERNET_01-2021_ENG
GFX4-ETHERNET
INSTALLATION AND
OPERATION MANUAL
Software Version: 1.0x
Code: 80403B / Edition 02 - 01-2021 ENG
INDEX
2
2
2
4
8
8
9
1
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Summary of Contents for gefran GFX4-ETHERNET
- Page 1 GFX4-ETHERNET INSTALLATION AND OPERATION MANUAL Software Version: 1.0x Code: 80403B / Edition 02 - 01-2021 ENG INDEX 1 Introduction 2 Features 3 Dip-switch function 4 Setup PC Connection 5 Test Board Connection Using PING Command 6 Connect the Board to Your LAN 7 GFX4-ETH’s Modbus TCP/IP implemented command 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
- Page 2 1 • Introduction The GFX4-ETH module is IEEE 802.3 compliant supporting Ethernet operation for MODBUS TCP/IP communication architecture. MODBUS SERIAL CLIENT MODBUS MODBUS TCP/IP TCP/IP CLIENT CLIENT Client TCP/IP MODBUS MODBUS MODBUS GEFLEX GEFLEX TCP/IP TCP/IP SLAVE n SLAVE n + 1 SERVER SERVER GFX4-ETH MODBUS Serial GEFLEX NETWORK 2 • Features • IEEE 802.3 compliant • Full-duplex and half-duplex modes • Capable of supporting both 10 Mbps and 100 Mbps data rates • Single RJ45 connection with leds indicator (yellow = link , green = activity)
- Page 3 3.1 Resetting Parameters to Factory Defaults At any moment, all of the GFX4-ETH board parameters can be restored to the factory default settings. To do so: 1. Set Dip Switch S1 dip 1 = ON (located near RJ45 connector) 2. Restart GFX4-ETH board 3. Set Dip Switch S1 dip 1 = OFF 3.2 Selecting the Baud rate Select the baud rate (10Mbit/s or 100Mbit/s) with Dip-switch 2. 1. Setting Dip-switch 2 = ON for 10Mbit/s Dip-switch 2 = OFF for 100 Mbit/s (default) 2. Reboot the board Note: if used on PC-compatible systems, it is advisable to supply the table of ARP addresses Ex.: ARP-D control In other systems (PLC) not equipped with this control, it is advisable to switch off and then on. 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
- Page 4 4 • Setup PC Connection All the information in this quick guide require that the GFX4-ETH communicates with the host PC through a LAN con- nection. In this pages you’ll learn how to configure the PC to communicate with the GFX4-ETH using an Ethernet cross cable or hub/switch. The following steps are based on a Windows XP system. 1. Open the Windows Control Panel and open the Network. Connections item: 2. If a Local Area Connection is already available, go to step 8. Otherwise, run the “New Connection” wizard. 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
- Page 5 3. The following dialog box will appear. Click Next. 4. On the next dialog box, select the “Connect to the Internet” option and click the “Next” button. 5. On the next dialog box, select the “Set up my connection manually option and click the “Next” button. 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
- Page 6 6. On the next dialog box, select the “Connect using a broadband connection that is always on” option and click the “Next” button. 7. When the last dialog box appears, click the “Finish” button. 8. Open the newly created connection (or the existing connection if you are coming from step 2) and click the “Properties” button. 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
- Page 7 9. Select the “Internet Protocol (TCP/IP)” item and click the “Properties” button. 10. If you have started from an existing connection, write down all of the TCP/IP parameters. You’ll need them later to restore your LAN settings to the original parameters. 11. Select the manual settings and type in the following values: IP address: 192.168.1.101 Subnet mask: 255.255.255.0 Click the “OK” button on all LAN setup dialog boxes. 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
- Page 8 5 • Test Board Connection Using PING Command 1. Power up the board and verify the POWER led turn on. 2. Connect the GFX4-ETH to the PC through an Ethernet cross cable or hub / switch. 3. Open a Command Prompt window (on Windows XP, from the Windows Start menu, select Run, enter CMD and click the “OK” button). 4. At the command prompt, type: PING 192.168.1.100 5. If the connection has been properly setup, the PING command will return a positive feedback. 6 • Connect the Board to Your LAN Before connecting the GFX4-ETH board to your LAN, the IP address must be changed to match the LAN settings. To change the GFX4-ETH’s IP address, do the following. 1. With the GFX4-ETH still connected to the PC via the Ethernet cross cable or hub /switch, launch the SetIp_for_Geflex/GFX4 (see GF_eXpress documentation) utility that is located in the CD-ROM. To set up the Node field number so that or in compliance with the real value of the rotary of card GFX4-ETH. Press the Get current IP button. You can see actual IP address , subnet mask , default gateway and MAC adress. 4. Set your parameter and after click on Set new IP button.
- Page 9 7 • GFX4-ETH’s Modbus TCP/IP implemented command • 01 (0x01) Read Coils • 02 (0x02) Read Discrete Inputs • 03 (0x03) Read Holding Registers • 04 (0x04) Read Input Registers • 05 (0x05) Write Single Coil • 06 (0x06) Write Single Register • 15 (0x0F) Write Multiple Coils • 16 (0x10) Write Multiple registers The MODBUS protocol defines a simple Protocol Data Unit (PDU) independent of the underlying communication layers. The mapping of MODBUS protocol on specific buses or networks can introduce some additional fields on the Application Data Unit (ADU). Additional address Function code Data...
- Page 10 A dedicated header is used on TCP/IP to identify the MODBUS Application Data Unit. It is called the MBAP header (MODBUS Application Protocol header). This header provides some differences compared to the MODBUS RTU application data unit used on serial line: the MODBUS ‘slave address’ field usually used on MODBUS Serial Line is replaced by a single byte ‘Unit Identifier’ within the MBAP Header. The ‘Unit Identifier’ is used to communicate via devices such as bridges, routers and gateways that use a single IP address to support multiple independent MODBUS end units. All MODBUS requests and responses are designed in such a way that the recipient can verify that a message is fini- shed. For function codes where the MODBUS PDU has a fixed length, the function code alone is sufficient. For function codes carrying a variable amount of data in the request or response, the data field includes a byte count. When MODBUS is carried over TCP, additional length information is carried in the MBAP header to allow the recipient to recognize message boundaries even if the message has been split into multiple packets for transmission. The existence of explicit and implicit length rules, and use of a CRC-32 error check code (on Ethernet) results in an infinitesimal chance of undetected corruption to a request or response message. The MBAP Header contains the following fields: Fields Length Description Client Server 2 Bytes Identification of a Initialized by the client Recopied by the server Transaction MODBUS Request / from the received request Identifier Response transaction 2 Bytes 0 = MODBUS protocol Initialized by the client Recopied by the server Protocol from the received request Identifier 2 Bytes Number of following bytes Initialized by the client Initialized by the server Length (request)
- Page 11 Serial communication time constraints in Modbus RTU The following time constraints must be complied with in order to allow correct serial data exchange with the device: Reading Word/Register parameters: Reading N consecutive parameters, with N from 1 to 16, requires a time of almost 50 ms. In this case the following read and write Modbus command, to the same node, must be sent after this interval time. Writing Word/Register parameters: Writing N consecutive parameters, with N ranging from 1 to 16, if all values (maximum 16) on the device are updated, will take a time of:50ms + N x 80ms(*) with N from 1 to 16. The times reported refer to the case in which the Baudrate of the serial line (parameter bAu Modbus address 45) is 19200. (*) If STATUS_W parameters (Modbus address 305) are included in the write request and their value is different from the one currently present in the slave, the time required to write each one will be 240ms (instead of 80ms). GEFRAN spa via Sebina 74 25050 Provaglio d’Iseo (BS) Italy Tel. +39 030 9888.1 Fax +39 030 9839063 - info@gefran.com -http://www.gefran.com 80403B_MSW_GFX4-ETHERNET_01-2021_ENG...
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