Emerson Exchange 365

Totalizer in SQ controller

Is there a way to keep the value of Totalizer intact instead of initializing to zero after cold re-start period has expired in SQ controller? I have enabled the NVM memory for the Integrator block and the control module, but the totalizer value goes back to zero whenever SQ controller is power up after the cold restart period.

mnizami

• 11 Jun 2014 11:21 AM
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• Youssef.El-Bahtimy

  

  • 11 Jun 2014 1:54 PM

  Regarding your statement

  "the totalizer value goes back to zero whenever SQ controller is power up after the cold restart period"

  The purpose of the cold restart memory period is to define when information is to be discarded after being powered down.  From BOL:

  "... if the specified time elapses before power is restored, the controller goes into the USERRESTART state. This state requires you to download the controller node from the Explorer."

  (http://www3.emersonprocess.com/systems/support/bol1131/source/extfile/b_theory/html/controller_restart.htm)

  If you ket the cold restart time elapse, the values will be cleared.

  The Integrator block (totalizer) preserves the following parameters.  I assume you have selected 'Restore Parameter Value after Restart' on OUT.

  Function Block

  Non-Accumulator Parameters (restored following a power failure)

  Accumulator Parameters (restored following a power failure and after total download)

  Integrator (INT)

  BAD_MASK CLOCK_PER ENABLE_IN_2 IN_1 IN_2 INTEG_OPTS INTEG_TYPE OUT_PTRIP OUT_TRIP PRE_TRIP PULSE_VAL1 PULSE_VAL2 RESET_IN REV_FLOW1 REV_FLOW2 STATUS_OPTS TIME_UNIT1 TIME_UNIT2 UNCERT_LIM UNIT_CONV

  ABSTOTAL N_RESET OUT RTOTAL SABSTOTAL SRTOTAL STOTAL

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