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What does a DMS Loop Point send out when the setpoint and process variable are equal and only a Proportional constant is used?

Issue

What does a DMS Loop Point send out when the setpoint and process variable are equal and only a Proportional constant is used?

Environment

DMS and Microsmart

Cause

Understanding how to apply a DMS Loop Point to a control application

Resolution

A proportional-only Loop Point assumes a 'midrange' output when the setpoint and process variable are equal.

'midrange' means midway between the loop output high range and low range (typically 100 and 0 respectively).

For more information, see the DMS Operator Interface User's Guide (F-25467), chapter 13.  It is available for download from the Publication Zone.

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