DH+ shutdown when plug or unplug PC with running RSLink

We have a mechine with 2 PLC5 connecting with DH+,
plus a programming plug beside machine.
Whenever you connect the PC to DH+ plug,you have
to shutdown or exit RSLink, otherwise the machine
will stop because of no more DH+ communication.
Why like that?

Thanks for Help.

SWAG.

Your PC has the same Node address as one of the PLC's.

If you have off line copies of the programs, check the node addresses, and then check the PC's node address.

Make sure the blue hose is wired correctly and that you have the correct termination resistors in place; R values are dependent on the network speed.

thanks for tips.

I will check them.
The problem is we have 2 same machines with same problem.
When you restart the RSLINK after you plug
PC with DH+ or shut off(exit) Rslink bsfore
you unplug PC with DH+,it wouldn't have any problem
with DH+ communication.