KBA Rapida 74 TA4 Issue

Hello,

I have an issue with KBA Rapida 74, TA4 communication issue. PLC has Error Register LED 2 glowing.



I have tried reseting the PLC address (holding down T1, power disconnect, power connect while holding T1, on OS click T0 until M001 is displayed, then T2 until W040 is displayed because it's the forth tower, after that T2 to confirm and RESET) . After that, issue is still present.

Error displayed on screen.


Does anyone have this issue or experience how to resolve this issue? I uploaded photos in attachment.

Thank you