Emerson Exchange 365

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DC Function Block

Within the DC function block if the block mode goes into Local Override (due to the interlock being false), when the interlock goes to true, how do you get the block back into Cascade mode?

Currently when the interlock goes true, the mode stays in Local Override and the OUT_D remains passive in lieu of going active (desired).

Note: There are no IO_OUT’s nor IO_IN’s assigned to this block.

mikesteiger

• 4 Apr 2022 3:03 PM
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2 Replies

• Scott Thompson

  

  • 4 Apr 2022 3:52 PM

  Check the DEVICE_OPTS on the DC block and see if Reset Required is enabled. If it is enabled then a trigger of RESET_D is required to re-enable the DC block after shutdown due to interlock. If you don't want the reset function then disabling the Reset Required will release the LO mode as soon as the interlock clears.

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• John Rezabek

  

  • 4 Apr 2022 7:01 PM

  "INTERLOCK_D" must also be set to "1" / True to clear LO. Check the block online; you can set the parameter as admin to 1 - Good Noncascade"

  Also "MODE>TARGET must be Cascade.

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