You have several options:
1. Deploy 2 instances of Rapid SCADA (local and remote) and connect them using Rapid Gate module.
2. Get data from a remote computer by the web application.
Thank you very much!But I have some questions:
1.Rapid Gate
If I have three devices in different places.I have to install communicatior,
sever and rapid gate on the local computer which connects the device in every places.And I also have to install a sever on the remote computer.
Then I can get data of all devices from the sever on the remote computer?
2.The efficiency of the scheme does not meet my application requirements.
Definitely, your diagram is correct.
If the system is not big, I suggest to deploy the same configuration database for all local computers and the remote computer to make configuring easier.