WAGO-I/O-CHECK is an easy-to-use Windows application for operating and displaying a node from WAGO-I/O-SYSTEM 750, without the node being connected to a fieldbus system. The software reads the configuration from the node and displays it as a graphic on the screen. The graphic can be printed as documentation together with a configuration list. WAGO-I/O-CHECK enables the process data of individual I/O modules to be displayed and specified. This means that the field-side wiring, including all existing sensors and actuators, can be checked during commissioning. Application-specific settings (such as selecting the baud rate or sensor types) can be made for certain interface, Pt100 and thermocouple modules. For communication between WAGO-I/O-CHECK and the node, the coupler is connected to a free PC serial or USB interface using the communication cable supplied in the set. Included in delivery CD-ROM with software and serial communication cable 750-920