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Old February 12th, 2005, 07:32 PM   #1
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Flags, Tags, industry terminology and acronyms.

Please excuse me I forgot my password..its at work I am BOWRIDER.I have been a regular visitor to this site for some time now. I am a lowly maintenance mechanic who has been in the process learning plcs on my own for some time now. It was this site that inspired me on the solution for a problem we had for a certain piece of equipment. Forgive me for not remembering the contributor but he posted an example of indirect addressing to get into the guts of how a timer works (Allen Bradley). We had a problem with a case erector seeming to loose “time” intermittently and not releasing the cases when it was supposed to. It is controlled by a micrologix 1000. Using the contributors example, (I had to use indexed addressing since the 1000 does not support indirect), I created a “trap”. Basically I took a snapshot of the high speed counter every 10th of a second or so and when the machine screwed up again I checked the log and found the counter had actually reversed and stalled and then took off again. The cause turned out to be the coupling between the encoder and the drive had split and occasionally was breaking loose and slipping. Because of the mount position of the coupling you would have never seen it. So hats off to all of you for your past, present and future help.
Now my question I have had a problem with the terms Flags, Tags and some acronyms used on this site. DDE, DINT? And many more. I would love to see a layman’s (translate stupid guys) explanation. From what I have gathered the term flag could represent any (my term here) internal bit. Tags. Another word for an address? I would most welcome your enlightenment.
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