beautypg.com

Rockwell Automation Energy Management Accelerator Toolkit Quick Start User Manual

Page 391

background image

Rockwell Automation Publication IASIMP-QS016C-EN-P - October 2014

391

Demand Control Chapter 12

The PM UDT is used to store the main load attributes for each load.

Most of the demand controller tags will be added as program scope tags. However, there are a few tags that will be added as
controller scope, shown in the figure below. The power monitor message tags are required by the Message instruction to be
controller scope. The FP_DMD tag has been configured as controller scope to minimize the length of the tagnames used in
the HMI.

Name

Data Type

Description

MeteringIteration

REAL

Read from PowerMonitor Demand Results

element

Predicted_Demand_KW

REAL

Read from PowerMonitor Demand Results

element

Present_Billing_Demand_KW

REAL

Set to the max of interval demands during the

on-peak time-of-use periods in the current billing

month

Real_Power_Demand

REAL

Read from PowerMonitor Demand Results

element

Period_Remaining_Sec

REAL

Seconds remaining in the current interval

Interval_Elapsed_Time

REAL

Read from PowerMonitor Demand Results

element

Real_Time_Clock

DINT[7]

Read from PowerMonitor Date and Time

Configuration element

Demand_Period_Min

DINT

Read from PowerMonitor Advanced

Configuration element

Number_of_Demand_Periods

DINT

Read from PowerMonitor Advanced

Configuration element

Billing_End_Date

DINT

Monthly billing date

End_Of_Interval

BOOL

Set for one scan at the end of each 15-minute

interval

Alm_Comm

BOOL

Loss of Communication Alarm

Alm_Cfg

BOOL

Invalid Demand Configuration Alarm

Interval_Timer

TIMER

15 minute interval timer, synchronized with the

interval elapsed time in the PM once per interval

Billing_Start_Init

TIMER

Present Billing Demand Initialize Timer

Comm_Timer

TIMER

Communication Alarm Timer