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The serial MPI or HMI adpaters are painfully slow. I would seriously consider to purchase some newer hardware. I assume this refers to the following Siemens product: HMI-adapter (6ES7 972-0CA1X-0XA0).ĭoes this mean that the OCP server can only use a Serial connection via the HMI adapter for the S7-300 directly? Would it be possible to use a driverless Serial to USB adapter with the HMI adapter, or for example the Siemens CP5711 MPI to USB adapter? If it is not possible to use a USB based solution, We would have to use an older desktop PC with an serial comport or an additional PCI card and that is something we would like to avoid.Īny help on this matter would be highly appreciated. On the OPC server webpage under the OPC Device Connectivity heading, it is specifically stated "Siemens HMI Adapter for S7-300/400 via Serial with HMI adapter". Now, most computers today doesn't have serial comports anymore, but rather USB ports. What we would like to do for simplicity's sake is to use a commercial laptop computer with touchscreen capability thus having a low cost "all-in-one" solution, both for local input & control and web publishing capability. This means that we currently haven't settled on a solution for the "Operator Panel" since this would be dependent on how the PLC and panel interfaces.
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Since this is a bachelor project provided by the school and the school is basically paying for everything, we are on a rather strict budget. In order to create a HMI system, we will also acquire the NI DSC module as it should have everything we need (NI OPC is included?. As such, I have a Siemens S7-300 PLC and the latest edition of LabVIEW (2009 Professional Ed.) available to me. These storagetanks and control system is placed on a wheeled demonstration model so that it can be used in classrooms and auditoriums. This is to be done locally via a "Operator Panel" and also remotely over the Internet via webbrowser. As a part of the final year Bachelor Thesis project I and two others are involved with, I have been tasked with setting up an HMI/SCADA system to control level and flow in several water storage tanks.