Determine if setpoint is static

Applicable Systems

• Primary: GENSYS

Objective/Method/Outcome

• Objective: Determine if setpoint is static.

• Method: The rule examines a set point during occupancy hours (Occ) and determines how many times it was changed. If the weekly count is less than the threshold, an insight is generated.

• Outcome: An insight is generated if weekly set point reset threshold is not reached.

Logic

• Input (normalized) set point and occupancy
• If the building is occupied pass the setpoint.
• Compare the current set point with the previous set point.
• Calculate setpoint reset count (CTL) and aggregate resets on weekly basis.
• If setpoint reset count exceeds allowed weekly reset count threshold, generate insight.

while( Occ == 1 ){
   if( Set point != Prev. Set point ){
      Reset Counter = Reset Counter + 1
   }
   if( Reset Counter < Weekly Reset Threshold){
      Insight- Setpoint Reset below Threshold
   }
}

Description / Method

The rule examines a set point during occupancy hours (Occ) and determines how many times it was changed. If the weekly count is less than the threshold, an insight is generated.

Diagnosis / Recommended Action

1. Investigate if a set point reset strategy is a viable option for this sensor
2. Check if set point is in manual

Message

Set point (SP) has been static for the past week.

Notes

To change the period, edit block 21 (default is weekly). To change allowable minimum changed allowed, edit block 22 (default is 1 time).Default Values for Constants

• Weekly Setpoint Reset Threshold: 1

Rule Template Type

• Insight Type: Fault Detection
• Trigger Type: Active High

Default Priority

Medium

Inputs

Inputs	Units	Default Value	Tags	Description
Setpoint			sp	Set point statistics
Occupied			occupied	Building occupancy

Output Calculated Trend Logs

Output CTL	Units	Description
Setpoint_Reset_Count		Reset count statistics