说明：  System Software DeviceNet • loadable Firmware* • System Configurator SyCon** • OPC Server** • CIF Device Driver • Driver for SoftPLCs** • GSD/EDS files • Documentation for all our Communication InterFaces CIF. The Communication Interface handles the complete data exchange between the connected fieldbus stations and the PC. The data is available as process image in the dual-port memory of the CIF. The message oriented data exchange is handled via a mailbox in the dual-port memory.