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ToHe

PLC web server hardware

7 posts in this topic

I need to develop a project where I have to control a PLC from a web application. I have knowledge of web applications, but I have almost no knowledge of PLC. I need to read/write values from/to the PLC and I also have to run local applications on the PLC. So my first idea was to write a web service that runs on the PLC so that I can send requests from the web application to the PLC & vice versa. Preferably I would like to write the web service in php or java, support for VPN connections would also be a nice feature. Is it a good idea to use a device with an embedded linux distribution or not? What is the best PLC device that fits my needs? Thanks in advance.

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What programming language do you expect to use on the PLC? It's nothing like the programming on a PC. You can't just write a PC program and run it on a PLC. There are several PLC manufacturers who offer web server modules for the PLC. There are hundreds of companies who offer software packages to communicate with a PLC from a web browser. Typically any SCADA software would have capabilities like this. You haven't provided nearly enough information on the PLC you need. How many inputs? What types? How many outputs? What types? What type of control will it be doing? How large of a program do you plan to write? What PLC programming languages are you familiar with?

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This could be done with the GEIP combination of RXi and iPC, not the least costly but it could be done as you wish. RXi - http://www.ge-ip.com/products/pac-programmable-controllers/c547 iPC - http://www.ge-ip.com/products/industrial-computers/c545 The iPC can be mounted on top of the RXi.

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Greetings, For your application, what are your PLC requirements. How many I/O and what type will you require. PLCs are restricted by I/O count and type. So if one PLC has what you are looking for in terms of web server but doesn't have a sufficient number or type of I/O then you wouldn't be able to use it.

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Hi ToHe, What are your PLC requirements? How many inputs and outputs should PLC have? What will your programming language be? Here are some of our PLC and PAC products. http://www.icpdas-usa.com/programmable_automation_controllers.html?r=Kaan http://www.icpdas-usa.com/embedded_controllers_plc_controllers.html?r=Kaan

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you have to make a vpn and an virtual card...i have a friend who has done it many times...i'll ask him and tell u here... http://www.electrotechnic.mihanblog.com/extrapage/hmi Edited by majid1986

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This post of from a year and a half ago from a user with one post, I doubt he is reviewing it...

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