How is the PAULSE instruction used?

• A. Used for PLC communication signals as just a 'flash' for the default time of 0.3 seconds; does not delay processing; the cursor moves to the next line while timer expires.
• B. Used to pause program for a configurable amount of time before continuing.
• C. Used to latch a bit in a register for 1 second.
• D. Used to trigger a subroutine.

Answer: (A)

PAULSE creates a brief, non-blocking signal for PLC communication. It outputs a pulse that lasts a default 0.3 seconds. The program does not wait for this pulse to finish; the cursor moves to the next line while the 0.3-second timer expires in the background. This lets the PLC see a quick signal without pausing robot processing, serving as a simple handshake or trigger. If the goal were to pause the program for a configurable duration, latch a bit, or call a subroutine, those behaviors would be achieved with different instructions, not PAULSE.