DMC used a Red Lion HMI interface for the Mitsubishi PLC running on the customer's machine. Our engineers then connected the HMI to a middleware PC running a java application so that the mainframe and Red Lion HMI could communicate. Configuring Red Lion as a web server, the HMI not only downloaded job data from the middleware to the PLC, but it fetched live tags from the PLC as well. Downloading job data was completed using HTTP POST method, while fetching tags utilized GET method.
DMC also provided a simulation mode on the Red Lion HMI. This mode simulated the live PLC so that testing could be done offline resulting in minimal PLC downtime. An additional web page simulated the middleware posting of job data to the Red Lion HMI.
Learn more about DMC's HMI programming services.