To check the Input signal, users can select command “Input Port” in the Draw Menu or click the icon.
When selected, there will be an input port property setting appearing in the Property Toolbar as Figure shows.
I/O Control Condition: The software will pause until the input signal is the same as the I/O control condition.
Message: If checked, the software will pop up a message box to info the user. The message text can be custom defined.