adccommunitymod (AutomationDirect) asked a question.

D4-450 programming issue

Created Date: April 16,2012

Created By: kramrellim

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I have an issue with programming a D4-450. I'm using quite a few "ORPD " / "or positive transition ". I'm using a few "STND " / "store negitive transition ". About half way down my plc program the "ORPD " code stops working. The "STND " always work. I have tested this by set a "SET " coil. I can see the "ORPD " change but the coil does not set on. My question is, is there a limit to the "ORPD " that can be used.


  • adccommunitymod (AutomationDirect)

    Created Date: April 16,2012

    Created by: kramrellim

    I have an issue with programming a D4-450.

    I'm using quite a few "ORPD " / "or positive transition ". I'm using a few

    "STND " / "store negitive transition ". About half way down my plc program

    the "ORPD " code stops working. The "STND " always work.

    I have tested this by set a "SET " coil. I can see the "ORPD " change but the coil

    does not set on.

    My question is, is there a limit to the "ORPD " that can be used.

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