Digital I/O Window Digital I/O Window The Show check boxes are used to select the digital I/O signal types to display, as follows: ACE User's Guide, 3.6.x, 18316-000 Rev A Page 167 Item Description Outputs Displays the digital I/O output signals. Inputs Displays the digital I/O input signals. Robot Displays the digital I/O robot signals. Soft Displays the digital I/O soft signals. Custom Allows you to watch I/O variables defined in the workspace. For details on creating variables, see Variable Editor on page 131.