1.4 Terms1.4 TermsThe following terms are used for settings on the software for connecting the FP7 CPU unit toEthernet LAN, and in the Users Manuals. Server connection and client connection These indicate methods for connecting a virtual communication line between FP7 and anexternal device. "Server connection" refers to a method to wait for connection from another client. "Client connection" refers to a method to connect a virtual communication line from the FP7CPU unit to another external device port. Master communication and slave communication These indicate methods for actually sending/receiving messages and data between FP7 andan external device. In master communication, PLC sends commands and receives responses. In slave communication, commands are received from an external device, and responsesare returned. In a system using FP7, whether server connection or client connection is selected, onceconnection is opened and a virtual communication line is connected, commands andresponses can be sent and received from both sides.FP7 CPU(serverconnection)External device(client connection)IP XXXXXX IP XXXXXXMastercommunicationSlavecommunicationEthernetLANCommandResponseCommandResponseFP7 CPU(client connection)External device(serverconnection)IP XXXXXX IP XXXXXXMastercommunicationSlavecommunicationEthernetLANCommandResponseCommandResponseVirtual line connectionfrom external deviceVirtual line connectionfrom FP7 CPUPhone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
