Gateway time out

Hi, i have a ABX-PDPM-RTUS with article number AB7666-B and firmware 2.16.01.
It is malfunctioning with the gateway status led blinking red when machine is started.
The machine module connected to it indicates converter timeout error and the machine shutdown.
Please assist

There is a Network Interface fault on the Profibus network. Were any changes made, nodes added, etc.?

Have you tested the bus power and resistance?