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Entries for September 2009

Siemens Simatic S7-300 - Retaining Values When Downloading a Datablock

A simple yet common problem when programming a Siemens Simatic S7-300 PLC is losing the data already stored in the PLC after downloading an updated data block. If you are simply adding items to the end of a flat data block (not adding items to a u...


Installing Visual Studio 6.0 on Windows XP or Vista

One of the more fun, and sometimes challenging aspects of working at DMC are service calls to work on legacy systems, hardware, and software. I have recently been working on a Baldor motion control system with a Visual C++ 6.0 front end. When I fi...


Editing Underlying Data in MS SQL Reporting Service (SSRS)

In the past, DMC has used MS SQL Server Reporting Service (SSRS) on multiple projects as a web-based reporting engine. I personally liked using SSRS a lot because it allowed us to design quite complicated reports in very little time. At the same time...


DMC Gets Great Turnout at University of Illinois Job Fair

DMC received a record number of visitors to our booth at yesterday's job fair at the University of Illinois. In our quest to hire the best of the best, Jon Carson and I met and spoke with some really promising candidates and managed to collect al...


If you have never heard about Genesis32 SCADA package from Iconics, this is the right time to learn more about it before we continue. I shall wait right here... Good, now you know what I am talking about. We'll talk about GraphWorX32, this ...


Mobile Volume Measurement Device on Fork Truck a Success

Recently one of DMC's customers, LTS Scale, issued a press release describing the first fork-truck-mounted dimensional weighing system. DMC worked closely with this customer from the first stages of research through the development of the system ...


Siemens S7 PLC Troubleshooting

Once you are familiar with their capabilities and methodologies, Siemens PLCs have the potential to make controls programming quicker and easier than ever. With support for function blocks, text-based programming, libraries, and user defined types, S...


Choosing the Right SharePoint Development Environment

When developing a SharePoint solution, there are many choices of development environments to get the job done, but they are not all equal. Once you’ve figured out the purpose of the page, how many web-parts are required for that purpose, and...


Sequential Function Chart to PLC Ladder Logic Translation

This content was originally published by Eric Anderson as a white paper.  Overview This blog describes a procedure for translating a state transition diagram or sequential function chart into a ladder diagram. Ladder diagrams are available...


DMC's Blog Now Features a Nifty Code Syntax Highlighter

Check out the nifty new code syntax highlighter we've added to the blog.  This will make it much easier for us to post code snippets. Here's a sample c# function that is automatically formatted. Also note the handy tools on the upper rig...


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