Moore combines HART loop monitor with Emerson’s digital valve controller

North Hills, CA—Moore Industries reports that its HIM HART loop monitor can now confirm that a Fisher FieldVue DVC6000 series digital valve controller from Emerson Process Management is performing a partial valve stroke test to validate proper emergency shutdown (ESD) of valve operations.

By Control Engineering Staff September 7, 2004

North Hills, CA— Moore Industries reports that its HIM HART loop monitor can now confirm that a Fisher FieldVue DVC6000 series digital valve controller from Emerson Process Management is performing a partial valve stroke test to validate proper emergency shutdown (ESD) of valve operations. And, if the test has failed, the monitor can alert users that the ESD valve is stuck. Partial valve stroke testing is an alternative to periodically testing critical ESD valves without completely stroking them, which normally means a disruptive process shutdown.

As part of its HART diagnostic data, DVC6000 sends digital information on the HART loop, when a partial valve stroke test is in progress and if the ESD valve is stuck. Mounted transparently on the HART loop, HIM continuously monitors HART data from the DVC6000. When a valve stroke test is initiated, HIM sends an alarm trip (relay) output to confirm that the test is in progress. If the valve is stuck shut, HIM initiates a second alarm to alert operator and maintenance personnel of the valve’s potentially dangerous condition.

HIM can also be set to send alarm trips outputs based on any of DVC6000’s diagnostic field device status byte data, including if standard HART fault conditions are detected. These may include:

Smart device configuration changes;

Primary and non-primary variables out of limits;

Primary variable analog output out of limits or fixed;

Cold start;

Field device malfunction; and

More status available.

In addition, HIM’s two or three analog outputs allow valve parameters, such as valve travel and output pressure, to be monitored and reported to the DCS via standard 4-20mA signals.

Control Engineering Daily News DeskJim Montague, news editorjmontague@reedbusiness.com