The virtual I/O function performs the following. Inputs the result of the output from the MFDO terminal to the MFDI terminal without external wiring. Inputs the result of the output from the MFAO terminal to the MFAI terminal without external wiring. image/svg+xml Warning image/svg+xml Sudden Movement Hazard Before you do a test run, make sure that the setting values for virtual input and output function parameters are correct. Virtual input and output functions can have different default settings and operation than wired input and output functions. Incorrect function settings can cause serious injury or death. Figure 1. Virtual Analog I/O Functional Block Diagram Figure 2. Virtual Digital I/O Functional Block Diagram Note: Refer to MFDI Setting Values for more information on the virtual digital input functions. Refer to MFDO Setting Values for more information on the virtual digital output functions. Refer to Multi-Function Analog Input Terminal Settings for more information on the virtual analog input functions. Refer to H4: Analog Outputs for more information on the virtual analog output functions. You cannot set 0 [3-Wire Sequence] and 20 or 2F [External Fault] to H7-01 to H7-04 [Virtual Multi-Function Input 1 to 4]. If you do not use virtual I/O, set H7-01 to H7-04 = F. This does not support the through mode.