The application outlined here is a project work of one of our trainees. The main focus dealt with a feasibility study in which it was to be determined which bandwidth a DSL connection must have in order to transmit the pictures of a web camera.
The observation object to be shown was a model-construction crane operable via the browser. Our application example deals exclusively with the control of the crane.
The solution
The crane has control electronics which actuate the swivel-up and swivel-down operations, the cable pull and the rotation of the crane. The outputs of a Web-IO were connected with the control electronic hardware of the crane.
For the functions of the Web-IO, a webpage was programmed which renders the crane operable via buttons and displays the live picture of the web-cam.
The whole thing was placed on the Internet via a DSL connection.
The details
1. The digital outputs of a Web-IO were connected with the control electronic hardware of the crane.
2. The Web-IO was plugged into a free Ethernet port and connected to a power supply.
3. The Web-IO was assigned an IP address.
4. A webpage was created with which the crane could be operated via buttons.
5. The webpage was made accessible on the Internet via DSL.
What was realized here on a small scale naturally also works on a large scale.
