Posts Tagged HART

Changing the COM port for a USB HART modem in Pactware

Written by: Dan Weise

I couldn’t communicate with a HART device. The configuration software I was using, Pactware, thought the USB HART modem was on COM 3, while Windows’ Device Manager showed it was actually on COM 6.

COM Port Post

COM Port Post 2

To change the COM port in Pactware to COM 6, I right clicked COM 3 and selected Parameter:

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Why won’t Pactware work with the Siemens LUT 400?

Written by: Dan Weise

I’ve used Pactware for a couple years now, so I was surprised when I couldn’t get the Siemens LUT400 to work with the software. The LUT400 ultrasonic level and flow controller comes with a DTM file that I installed before opening the Pactware software.

The DTM file can be downloaded from this link: http://tinyurl.com/cqk2cky

Once it had been installed, I opened Pactware and updated the device catalog, as seen in the picture below:

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But when I attempted to establish a HART connection to the LUT400, I got an error message:

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Digital Communications Toolkit

We’ve gotten feedback from several people who have asked what I carry around to deal with serial or Ethernet communications issues.  So I dumped out my comm tool bag and here’s the list of all the stuff.

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How does adding a 250-ohm resistor make HART work?

Sometimes there’s a problem getting a loop powered HART instrument to communicate when it’s on the benchtop, but it communicated fine when wired in the field.   Why is that? Read the rest of this entry »

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Getting Simatic PDM to run in Windows 7

PDM is Siemens’ Windows-based HART configuration tool.  My copy of PDM is a single point license that I use with a HART modem to configure field instruments using the “Lifelist” quick start app.

When I recently changed from Windows XP to Windows 7, the LifeList app would launch but the upload/download buttons were greyed out and it wouldn’t even attempt HART communication to field instruments.   Grrrrr, what to do? Read the rest of this entry »

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