LibPlcTag is a library that I used recently to communicate with Allen Bradley plc. It’s a C++ open source library and it can communicate with most of the Allen Bradley plcs, like Micrologix, CompactLogix, ControlLogix, SLC and Plc5. LibPlcTag works on the Ethernet/Ip stack and is LGPL licensed (you are ...
Read More »Using AdvancedHMI’s PLC drivers with C#
AdvancedHmi is a free and “almost open-source” HMI framework written in VB.Net that offer some drivers for PLCs, and also offer free SCADA objects for winforms users. I say “almost open-source” because the code of the two main libraries is not provided (MfgControl.AdvancedHMI.Drivers.dll and MfgControl.AdvancedHMI.Controls.dll), but it’s provided how to ...
Read More »PLC teleassistance and remote control
Teleassistance and remote control are becoming more and more popular, especially when the downtime cost is high, due to the need of specialistic help on how to solve failures that are not easy to find out. The capability to grant an immediate and specialistic assistance is a must-have for automatic ...
Read More »Conversion from PLC Siemens S7 to Allen Bradley RsLogix 5000 and back
A common task in the world of automation is to convert PLC programs from one platform to another. The reasons for this conversions can be different, like standardization of PLCs used by a factory, customers that asks for a specific PLC and so on. To convert a program from Siemens ...
Read More »Modbus configuration example for an Allen Bradley Micrologix 1400
The latest PLC Allen Bradley Micrologix 1400 is provided with Modbus TCP and RTU. This is a powerful feature and with this post i explain how to enable and how to use it. To configure the Modbus communication you need to know at least the basic information about Modbus protocol. ...
Read More »PLC-PC communication with C#: a quick resume about data exchange libraries
Let’s say that you want to build your own HMI, because: commercial SCADAs are too expensive for your application you need more control over the code and VBA is not good you want to protect your know-how you need a better HMI and you can’t do it with a normal ...
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