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In need of some advice for Motor permissive to run & stop.

Need some advice to where to start on for a motor permissive to stop after a sequence is complete?

gbilly

4 Replies

  • KeithStThomas
    The question is a little lacking in detail. Are you looking for what to program into a SFC to turn a motor off? You could just write to the DC1/SP parameter directly, set it to stop. A permissive will prevent a motor from starting, but will not stop a motor that is already running. Did you mean an interlock? While an interlock will stop the motor, you cannot start the motor again until the interlock is cleared. Depending how the module is configured, an interlock of a running motor will trigger an alarm too.

    Some more information about what you are looking for and/or trying to achieve would help us help you.
  • gbilly
    Thank you for the quick response, I apologize I am completely new to the delta v program. As I believe it’s function block setup, I got a fan motor blower on a heater that needs to be turned off after heater is started. But it remains running after start sequence is complete on every startup.
      
  • gbilly

    In reply to KeithStThomas:

    Thank you for the quick response, I apologize I am completely new to the delta v program. As I believe it’s function block setup, I got a fan motor blower on a heater that needs to be turned off after heater is started. But it remains running after start sequence is complete on every startup.
  • THENNARASU_R

    Hi

    As per Your requirement, you can use "CASCADE" Mode for the DC Function Block. and use Heater Status (start/stop) value

    to connect directly DC Function Block parameters Permissive & CASE_IN_D values. CASE_IN_D value 1 Means Start command,

    value 0 Means Stop Command. Permissive should be 1 before Starting the motor. So Take Heater Running

    Status (Consider Value as 1 = Running) Put NOT Gate. NOT Gate output ( Now Value 0) Connect Directly to DC Block

    CASE_IN_D & Permissive. If you have Motor Start/Stop Feedback Signal, connect to F_IN_D1 and Make sure with State Mask.

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