Author Topic: Duplicate Coil?  (Read 9808 times)

Dario8

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Duplicate Coil?
« on: May 11, 2006, 06:27:39 PM »
I'm trying to run this logic on an H-Series PLC (T22H-npn).  I've simplified my logic to just 2 components: 2 inputs and 1 output. I'm getting a message that says:
_______________________________
          Failed at Circuit#3
          Duplicate Coil:Output"MOut1"
          is already energized
_______________________________

Here's what my circuit looks like:
______________________________________________________________
|      Contact                               MOut1
|-------i||------------------------------[Latch]
|
|         MSW                                 MOut1
|-------i||------------------------------[Clear]
|
|        Reset                                MOut1
|-------i||------------------------------[Latch]
|_____________________________________________________________

The same logic worked on an E10-npn+ PLC, so I'm not sure why  I'm getting this problem. Am I missing something?

Thanks in advance for your help,
Dario
« Last Edit: May 11, 2006, 06:28:17 PM by Dario8 »

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Re:Duplicate Coil?
« Reply #1 on: May 11, 2006, 08:24:39 PM »
traditional Ladder logic rules dictates that a coil should not be controlled at more than one rung of the ladder program to prevent conflict in the logic. So what you should do in this case is to connect your "Reset" input in parallel to the "Contact" input so that either input will latch the MOut1.
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Dario8

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Re:Duplicate Coil?
« Reply #2 on: May 12, 2006, 07:59:44 AM »
Thank you, it worked!

But now why would it have worked as a .PE3 file and not as a .PC3 file? Should the original file not have worked in the first place? I guess I dont really need to know, now that i know how to avoid the error.

Thanks again,
Dario

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Re:Duplicate Coil?
« Reply #3 on: May 12, 2006, 05:12:24 PM »
I tried it on the .PE3 file, it still complain about the duplicate coil.

However, if you are using the WinTRiLOGI version 3.52 in E10 mode,  then although the software will warn you of the duplicate coil, it gives you the option to override the warning and continue the compilation.  Somehow in H-series mode that option to allow you to override it was not enabled.  That's may be why you think that it allows compilation under E10 mode.
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