Hi, AS Version：V4.12.5；
I can find the APC910 from the “online setting”,but can not connected.
When i click the button,noting happened.
Can someone help me figure out that how to solve the problem?
Thanks.
Hello;
aside from what @alexander.hefner said, this behaviour can also happen when your pc has same ip address as the APC, please also check your pc ethernet configuration
Yeah you are right, the PLC load is high,
it’s just my fault,
do you think that i should delate the topic because lack of directive significance?
@alexander.hefner
ok thanks,i will check that.
definitely not. Just mark the reply from Alexander as a solution 
Hi,
in my opinion, every information is a useful one and could help others in future!
About the high PLC load: in some projects you’ll have a high PLC load and have to deal with it even without “doing anythin wrong”.
Therefore, I want to mention 2 more things:
- sometimes it helps to have a look to the task class idle time setting of the project. Reserving a bit more idle time can help to keep the online communication stable even under high load. But be aware, that this reservation also brings even more load on the PLC.
- In the online connection setting, the’re also some parameters available to increase communication timeouts. Increasing this parameters could help to get a (more stable) online connection in case of high CPU load or slow network.
Best regards!