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Lighthouse PLCs, Inc. : Automation Forum

THE PURPOSE OF THIS FORUM IS: AUTOMATION SOLUTIONS.  IF YOU ARE A PERSON INVOLVED IN SOME ASPECT OF AUTOMATION, HAVE AN APPLICATION YOU JUST CAN'T QUITE GET A HANDLE ON  - HAVE A PRODUCT QUESTION - OR MAYBE HAVE AN ISSUE WITH SOMETHING (EVEN IF IT IS WITH US    ), IT IS POSSIBLE YOU WILL FIND THE ANSWER HERE!!  

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PLC and Inverter Forum
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EM dropping out of RUN mode

To Whom It May Concern,


I am having a problem with a PLC that was on a CNC router that was purchased from Japan around 1986. When the power is supplied to the machine, the run light blinks on and off along with the outputs. The input 0, which will toggle you from run to program, stays on all the time. The input and output power of the power supply on the PLC remain constant. It sometimes happens for 10 sec. and then stops and the machine will work fine after this. Sometimes it won't stop until you cycle power again.

If you think it is the CPU- can these still be purchased? Any info would be great. Thanks.






Robert Nichols


Electromechanical Supervisor


Ashley Furniture Ind.


One Ashley Way


Arcadia, Wi 54612


Ph. (60 -323-6205


Fax (60 -323-6013