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A M P 1 I N T E G R AT E D P O W E R A N D E N E R G Y I N S TA L L AT I O N I N S T R U C T I O N S
AMP1
Data logging
The AMP1H5 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 re¯ected 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.
For troubleshooting or service related questions, contact ABB at 800-782-8061 or at epis.component.support@abb.com
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.
Reading data
Access logged data with corresponding timestamps via the
Log_Buffer property of the Trend_Log object using the
BACnet ReadRange service. The AMP1H5 supports both the
"by Position" and "by Sequence Number" modes of the
ReadRange service, but not the "by Time" mode.
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