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Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 65

FactoryTalk Alarms and Events Logix-based Instructions (ALMD, ALMA) Chapter 1

State Diagrams when Acknowledgement Not Required

Arithmetic Status Flags: Arithmetic status flags are set for the ROC output.

Fault Conditions:

HInAlarm = False HInAlarm = True

In >= HLimit, MinDurationACC >= MinDurationPRE

In < (HLimit - Deadband)

HAcked = True

LInAlarm = False LInAlarm = True

In <= LLimit, MinDurationACC >= MinDurationPRE

In > (LLimit + Deadband)

LAcked = True

HHInAlarm = False HHInAlarm = True

In >= HHLimit, MinDurationACC >= MinDurationPRE

In < (HHLimit - Deadband)

HHAcked = True

LLInAlarm = False LLInAlarm = True

In <= LLLimit, MinDurationACC >= MinDurationPRE

In > (LLLimit + Deadband)

LLAcked = True

RocPosInAlarm = False RocPosInAlarm = True

ROC >= ROCPosLimit

ROC < ROCPosLimit

RocPosAcked = True

ROCPeriod

sSample)In(Previou-Sampl e)In(Current

ROC=

RocNegInAlarm = False RocNegInAlarm = True

ROC <= -ROCNegLimit

ROC > -ROCNegLimit

RocNegAcked = True

Where a new sample is collected on the

next scan after the ROCPeriod has elapsed.

Minor Fault Fault Type Fault Code

ROC overflow 4 4

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