[These comments were posted recently on Machine Builder Forum (ControlDesign.com/MBF) in response to Contributing Editor Jeremy Pollardās posting on whether the IEC 61131 standard has significant value to users.]
Training and Maintenance Win
The benefit for the user base is reduced cost of training and maintenance. When youāre trying to get 100,000 widgets per shift out the back door, a maintenance technician who can troubleshoot Vendor Aās code and then go and work on Vendor Bās code is a significant financial advantage.
MARC ROBBINS, controls engineer,
Los Alamos National Laboratory, lanl.gov
Desperately Seeking Benefits
I wholeheartedly agree that the end user (me) doesnāt benefit or appreciate most of the benefits gained from IEC 61131 software. Most of the time it just doesnāt help, and many times it seems to get in the way. Give me a well-coordinated environment like RSLogix for end user troubleshooting.
ROD SANDERS, electronic technician,
Stevens Graphics, stevensgraphicsinc.com
Best Weāve Got
You know IEC is about look and feel, so itās focused toward training, engineering, operation and installation.
Also, via the function block concepts it is focused on reusability of code, especially in different projects.
It gives you (especially if combined with SFC) a very structured approach to your software development process.
Perhaps the issue in the U.S. actuallyĀ is whether there is a consistent software development philosophy within industrial automation.
EELCO VAN DER WAL, managing director,
PLCopen, plcopen.org
Have You Seen the Emperorās Clothes?
When this thing was first promised, we were told that there would be āautomation code foundriesā where you would purchase standard code widgets and they could be used by any IEC 61131-3 PLC.
The emperor has no clothes with IEC 61131-3.
The vendor voting bloc at the IEC hijacked the whole process, just as they did with the eight-headed hydra for the fieldbus.
Thereās no way that a Siemens S7 expert can intuitively switch to ControlLogix and be ready to go.
RANJAN ACHARYA, senior systems engineer
Grantek Systems Integration, grantek.comĀ
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