A HMI connects four PLC with the same parameters (19200, N, 8, 2) through COM2 port RTU485. Because it is one-to-many, I use for loop to traverse four PLC to read variables. You only need to set the station number. by monitoring a second variable insi...
client initiates tcp connection con1:Aip: Aport- > Bip:Bport, does not have a problem, do not close the connection, initiate tcp connection con2:Aip:Aport- > Cip:Bport, will address already in use, according to the quad, the two connections are not the ...
problem description the iis7.5 80 port that the server is running is unmodifiable apache2.4 8080 port runs other services now it has done iis redirection to www.b.com--> www.b.com:8080 now access always has 8080 port number apache how to hide the ...
The default port of the page that pops up after 1, npm install-g create-react-app 2, create-react-app my-app 3, cd my-app 4, npm start is 3000. How to modify the default port? The server is not under the premise of this port number. Added: to packa...
give an example, the local client accesses the remote mysql server 3306 port. requires access to remote port 3306. my question is: does the network of the local client need to apply? Local access to remote port 3306, which port is used by the local...
the project uses vue+iview for development, the current problems encountered: each module includes the left menu bar, the right display area, a .vue file on the menu bar, and the right display area corresponds to a different .vue file. when I jump from...
when you run the angular project for the first time every day, you use the AngularCli command, ng serve-- open to start the project, but the first time every day is always unsuccessful. The error shows that Cannot GET , opens the angular-routing.ts file,...
if this error is reported when the figure is running, how to solve this problem in pycharm? Thank you! ...
has anyone ever used a reliable golang TCP services framework? the framework had better have the following two modules: 1. Session management of connections 2. The framework can customize the protocol ...
enter sudo-s in the terminal of mac and report a sudo: bin login_script.sh: command not found error after entering enter. What is the situation? How to deal with it? Thank you ...