Veris Industries E50H2A Installation Manual page 26

Compact power and energy meters with bacnet ms/tp support

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Table Of Contents

Table of Contents

Installation Guide

Power Monitoring

E50H2A, E50H5A

BACnet Programming Information (cont.)

Name

BI8

Reserved_BI8

Reserved

BI9

Phase_Loss_A

Phase Loss Phase A

BI10

Phase_Loss_B

Phase Loss Phase B

BI11

Phase_Loss_C

Phase Loss Phase C

BI12

Power_Factor_A

Low Power Factor Phase A

BI13

Power_Factor_B

Low Power Factor Phase B

BI14

Power_Factor_C

Low Power Factor Phase C

BI15

RTC_Reset

RTC Reset

(E50H5 only)

Data Logging (E50H5A only)

The E50H5A includes a data logging feature that records three meter parameters, accessible via BACnet using Trend_Log objects. All three Trend_Log objects utilize shared

data logging resources in the meter, so all three are controlled in unison. All writable properties other than Log_Device_Property_Object are common to all three Trend_Log

obects. Changes to these properties (Log_Enable, Start_Time, Stop_Time, Log_Interval, Stop_When_Full or Record Count) for any one of the objects will be reflected in

the corresponding property of all three objects. The Log_Interval property is also common with the Demand_Subinterval (Present_Value of AV11), since logging records are

updated synchronously with demand calculations.

Default settings cause logging to begin immediately, with 15 minute intervals and no stop time. When full, the buffer wraps and overwrites the oldest data first (unless the

Stop_When_Full property is used).

Configuration:

Use Log_Device_Object_Property to select the meter parameter to log with each object. Set this property to point to Present_Value property of any of the Analog_Input

objects. The default the values for the Log_Device_Object_Property of the three Trend_Log objects are set as follows:

• TL1 = Real Energy Consumption (AI1 Present_Value)

• TL2 = Reactive Energy Consumption (AI27 Present_Value)

• TL3 = Total Real Power Present Demand (AI34 Present_Value)

The Log_Interval (& Demand Subinterval) can be set from 10 seconds to 32767 seconds (values of 1000 to 3276700). The subinterval timer, which determines how often the

meter's demand accumulators are updated, also triggers writing to the Trend_Log log buffers. Use the Log_Interval property to set the data logging time subinterval, in units

of hundredths of a second (0.01 seconds). The default subinterval is 15 minutes (a value of 90000 in the Log_Interval property). The Buffer_Length is fixed at 5760, so at a 15

minute interval setting, the buffers hold 60 days of data.

Use the Stop_When_Full property to select either Single Shot (Stop_When_Full = TRUE) or Continuous mode (Stop_When_Full = FALSE) for data logging. The default mode

is Continuous. In Single Shot mode, the meter records data only until the buffer is full. Data for this time period is kept, but newer energy information is lost. In Continuous

mode, the meter continues to record energy data as long as the meter is operating. The buffer can only hold 5760 entries at one time, however, so when the number of records

exceeds 5760, the oldest entry is deleted to make room for the newest.

To start data logging with any of the three Trend_Log objects, set the Log_Enable property to TRUE or set the Start_Time and Stop_Time properties appropriately and wait

for logging to commence at Start_Time.

By default, the Record_Count property of the Trend_Log objects is initialized to Zero.

ZL0117-0D

Page 26 of 28

Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris 'V' logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.

Description

R/W

0=INACTIVE, 1=ACTIVE