The foreign field bus employs the embodiment two
Employ the embodiment one: Conversion using AnyBus serial gateway to realize Modbus Plus to Profibus. The question is proposed: Lie in Swiss West Lars (Vasteras) Famous in Rema Control AB saw rub apparatus automatic solution provider. In a project, the client requirement upgrades the whole factory to a system formed by Siemens S7 control device and Profibus-DP bus. However, the Off-The-Shelf saw deals with the measuring system to still use too outdatedly to guide health PLC (Modicon) ,And is connected to Modbus Plus network. This system work is good should keep, but other parts of the factory should carry on the staging. For this reason, Rema Control Company must seek a kind of solution, realizes and passes the new Profibus-DP network it to the machine format access of existing Modbus Plus network. Solution: Rema Control Company utilizes AnyBus serial gateway to transform the data into Profibus network from Modbus Plus network through two steps. A Modbus Plus serial gateway carries on the machine format import and export of 32 bytes in Modbus Plus network as the adapter of Modbus Plus network. Close Profibus network as a Profibus slave station on Profibus side, configure to the machine format import and export of 32 bytes too. Then utilize RS-422 serial port to set up the intraconnection which realizes two AnyBus gateways. Modbus Plus gateway is set up as Modbus RTU top management mode, Profibus gateway configured to Modbus RTU and is subordinate to the mode on its bunch of column rule. Lennart Hedman, director of system integration, Company of Rema Control, show " the intersection of AnyBus and gateway help us solve one thorny the intersection of customer and difficult problem, make our customer incorporate the existing measuring system in new Siemens S7 automated system. The flexible arrangement of AnyBus gateway can realize some particular data of system selection from Modbus Plus, combine and map these data to Profibus and hit through another gateway very easily " . Supplement the suggestion: HMS Company can offer simpler way to realize two inhouse networks are interconnected at present. The newest AnyBux-X series products can realize the interlinkage of two arbitrary inhouse networks on condition that hardly need any arrangement. Employ the embodiment two: Realize RS232 and communication of Profibus are changed under Modbus top management mode. This example has shown a sport control device with Modbus RTU serial agreement. AnyBus serial gateway reads the write data from the sport control device as master control set of ModBus. In AnyBus serial net turns off the command procedure of the configurator, ModBus master control set carries on the disposition to its list of scanning. AnyBus configurator define all ModBus command, register, data shine upon with preface in time. Later, AnyBus serial gateway controlled ModBus communication of the sport control device, and carried on the I/O through the built-in Profibus interface selecting data. Through this interface, the data are transmitted to Fieldbus main installation and PLC control device through Profibus. In the picture: 1. Data byte of the apparatus serial port output. 2. AnyBus serial gateway deals with the bottom layer Handshaking signal and data validation check-up (CRC) ,Guarantee not to know the error code in data. From all effective data that serial device get, deposit AnyBus in the serial gateway one's own memorizer it. If the data are invalid, AnyBus will require the serial apparatus ( RS232) automatically Retransmission. Guarantee to choose to transmit from the memorizer to the machine format exactness of Fieldbus main installation like this. 3. Data byte that PLC Fieldbus main installation receives. Notice AnyBus serial gateway only sending a part of the data flow received from the serial apparatus. 4. Data byte received from PLC Fieldbus. These bytes are used in PLC the input / output data from Fieldbs network. Stored and dealt with only from the real data of serial equipment selection by PLC. From the viewpoint of PLC, it is a serial interface in fact that PLC can ignore the sport control device, and regard it as having interface of built-in Profibus. Not this Profibus in pieces of example change to last Ethernet,it can SSI script or Java utility programs based on network server, choose the data in Anybus serial gateway memorizer to read and write, make the temperature regulator run online through the network. http://www.fieldbuses.com/n1992c46.aspx