Error 4808: No connection available to the PLC

Hello,
My problem is that i can connect to the X20CP0410 PLC only in BOOT mode. While in BOOT mode, I am able to find the PLC Online and create a project with it’s hardware. After going to RUN mode, I cannot find the PLC in Settings ->Online. I’m using AS 4.9.2.46.

  • SNMP ON,

  • WinPcap reinstalled.

Any ideas what might cause the trouble?

Hi @Szafa01, what is different between this topic and the one you created recently? Can't find PLC Online. AS 4.9

It looks pretty similar to me.

I have a couple of questions for you:

  • Can you connect using a different laptop?
  • You mentioned that you can connect in boot mode. Do you download only hardware or also some tasks?
  • What about SDM? Can you connect and check (CPU Load, logger information, etc.)?

Hi, the main difference is that in the first problem I couldn’t see the PLC at all.

Now, I can see it and connect, but only in BOOT mode. After going back to RUN,I can’t find it online, I can’t do a Transfer, and while trying to create a new project and choosing “Identify hardware…” i get the mentioned error.
Edit: I’m trying to download only hardware in the moment. Connection with other laptop worked fine.

Okay, I’ve closed your previous topic. Please always mark the answer that helped you the most. It will help others.

  • What about SDM? Can you connect and check (CPU Load, logger information, etc.)?