You can configure internal or external test pulses on all digital signals. Test pulses verify that a line can be de-energized or driven to a safe state.
The User Program runs both readback diagnostics and test pulse diagnostics when you configure test pulses. Readback faults and test pulse faults report as a single event in the User Program. If you configure a channel with DIn.TestPulseFault or DOn.TestPulseFault, a test pulse fault or a readback fault would trigger a response. Scan Interface reports readback faults and test pulse faults as unique events. Scan Interface will report whether a readback fault or a test pulse fault triggered that response.
You can use test pulse faults in two ways: