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DMC to Present at the 2011 Siemens Automation Summit
Frank Riordan

DMC to Present at the 2011 Siemens Automation Summit

DMC is excited to attend and present at the Siemens Automation Summit 2011 held from June 27-30 at Disney’s Yacht and Beach Club Resorts in Orlando, FL. The Summit is an annual conference that focuses on the end-users of Siemens automation products and provides a great venue for interacting and learning with our peer companies. DMC is a proud Siemens Solutions Partner with the most S7 Certified Engineers in the United States. Tim Jager, Nick Shea, and I will be attending the conference....

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Using Siemens S7-300 PLCs to Report System Errors
Jon Carson

Using Siemens S7-300 PLCs to Report System Errors

The Siemens S7-300 line of PLCs has about a million great features integrated into the programming environment. After I recently inherited a PLC project where some (many) of these were not implemented, I thought it might be a good idea to do a recap on some of the more useful functions Step7 has to offer us. By far one of the most useful, and sadly underutilized, capabilities available to us from the Step7 environment is the “Report System Errors” utility. This utility, when activ...

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Ken Brey

VNC on Siemens WinCC Flex HMI with WinCE

A version of VNC Server is available which works on Siemens MP277 and other Siemens displays that are WinCE 5.0 or higher. The open source project can be found here: http://sourceforge.net/projects/efonvnc/ The MP277 uses the ARM processor, so extract the contents of efonvnc_v4.3_wce5x_armv4i.zip into a folder in Program Files on the panel. Run the file VNCConfig.exe once to configure the connection. It is also available from the VNC icon in the system tray. Run WinVNC.exe to launch the se...

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Siemens S7-1200 PLC communicates through Sinaut MD720-3 cellular modem
Nick Shea

Siemens S7-1200 PLC communicates through Sinaut MD720-3 cellular modem

Many consumers, including myself, have tapped into the ever-growing functionality of mobile internet. Many people leverage this infrastructure for their mobile phone. Others are beginning to use WiMAX connections for their PCs. Not to be out-done, PLCs are also capable of communicating through wireless data plans. DMC just finished the proof-of-concept phase in a project using the new Siemens Simatic S7-1200 PLC and Siemens Sinaut MD720 GPRS GSM cellular modem. We were able to successfully se...

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Redundant Control Systems: Siemens S7 400H Series PLC and WinCC
Cesar Pena

Redundant Control Systems: Siemens S7 400H Series PLC and WinCC

There are certain control systems, such as in nuclear power plants and airplanes, that cannot be disabled or shut down, even momentarily, because of the threat to people’s lives. In these applications, a redundant control system must be in place to take over instantaneously if the primary system fails. I recently deployed one such redundant control system for train tunnel ventilation at a major international airport. The system's main objective is to control, reduce, and help exting...

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