Signals that are read or measured are called input signals. Those signals that are generated are called output (or standard output). Some specialized devices also support a Wired-OR output. Refer to your device documentation for more information on the types of input and output your device supports.
This section covers software-timed digital input/output operations—or unstrobed operations. These signals are controlled by software timing.
Measuring and generating digital values are used in a number of applications, including controlling relays and monitoring alarm states. Generally, measuring and generating digital values is used in laboratory testing, production testing, and industrial process monitoring and control.
Creating a Program