MODBUS FAULT

What does SLF mean?

This fault indicates an interruption in communication on the Modbus bus or a disconnected remote display terminal when [HMI command] (LCC) is enabled. If communication is not restored, remote control and monitoring capabilities will be lost, potentially leading to operational delays or safety issues if critical information cannot be exchanged with the control system.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the link with the remote display terminal, ensuring it is securely connected if [HMI command] (LCC) is enabled and the terminal is intended for use.