Error 4808: No connection available to the PLC

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1

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?

2

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.)?
3

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.

4

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.)?