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Host Engineering Forum > General Category > ECOMs and ECOM100s > DL06 locking up
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Author Topic: DL06 locking up  (Read 1817 times)
Controls Guy
Internal Dev
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Posts: 1134


Darth Ladder
« Reply #15 on: May 12, 2010, 06:55:39 pm »
Quote from: WRT on May 12, 2010, 04:24:16 pm
Glad you noticed that Darth.  I rather hoped someone would notice my wit  Smiley


LBL K666
GOTO K666

PLC Program of the Beast
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I retract my earlier statement that half of all politicians are crooks.  Half of all politicians are NOT crooks.  There.
WRT
Full Member
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Posts: 25
« Reply #16 on: May 12, 2010, 08:00:33 pm »
This is more fun than Facebook!
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b_carlton
Internal Dev
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Posts: 388



WWW
« Reply #17 on: May 12, 2010, 09:11:43 pm »
'Farmville' on a PLC?
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An output is a PLC's way of getting its inputs to change.
WRT
Full Member
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Posts: 25
« Reply #18 on: May 13, 2010, 09:35:32 pm »
I finally found the lock out problem after a week of remote troubleshooting.  A Solid State relay "coil" connected to one of the PLC outputs was shorted.  I thought I was clever putting in a 1 amp power supply so that all the circuits were protected, but what happened is that the low voltage from the short killed the PLC and left it in a bad state.  No wonder it was not communicating!  I couldn't forensic it because the PLC wasn't talking every time it tried to turn that output on!

So another moral:

Put a power supply in that is hefty enough to open a separate fuse on the output circuits without dropping the voltage so much that the PLC goes down.  Even better, annunciate the fuse so you know what the problem is.
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Controls Guy
Internal Dev
****
Posts: 1134


Darth Ladder
« Reply #19 on: May 27, 2010, 02:15:22 pm »
I agree.  I usually have a dedicated fuse or breaker on the output common.  When you send your kids (wires) out in the world, you never know what's going to happen to them.   Wink
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I retract my earlier statement that half of all politicians are crooks.  Half of all politicians are NOT crooks.  There.
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