Cause : Overload of Digital Output Terminal 15 comes when the system has detected an overload condition, meaning that the connected motor or equipment is drawing more current than it is rated for, potentially leading to overheating or damage.

• Check the load connected to terminal 15 or remove the short-circuit connection.
• Check P 9.4.1.1 Digital I/O Mode and P 9.4.2.1 T 15 Mode.