Transistor

No response from NX701 behind intranet firewall router

3 posts in this topic

I use Netgear routers with multi-NAT capability to attach machines to the company LAN. One of the advantages is that similar machines can have identical network addressing schemes while a multi-NAT router on each machine can be used to assign unique external addresses. The usual error on these setups is to forget to assign a gateway IP address and so the PLC can't respond to requests from outside its subnet.

  • I have the router set up as normal (as I have done a hundred times before on other machines).
  • PLC has correct IP address, subnet and gateway (that of the router LAN address).
  • Router has NAT rule configured, correct LAN subnet, etc.
  • I can PING the PLC from the company network. This implies that the router, wiring, etc., are all OK.
  • If I disconnect the PLC ethernet cable during a PING I get errors. This implies that the address is unique, etc.
  • Controller --> Communication Setup --> Ethernet connection via hub --> Ethernet communication test --> "A communication error has occurred."

Has anyone seen this? Any reason why it shouldn't work as I expect?

Many thanks.

 

Share this post


Link to post
Share on other sites

Did you try to go online with the controller as well?  I have seen where the test can fail, but it is still able to connect.

Share this post


Link to post
Share on other sites

I tried to go online as you suggested but that failed too.

I can connect locally but I'm having trouble transferring the program. See my other post, if you have time.

Thanks.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now