AMP1
Trend_log objects
Trend_log properties used
R/W
Units
Additional information
Object_Name
R
Trend_Log_<n>
Where n is 1-3 (there are three instances of Trend_Log objects available)
Description
R
Trend_Log <n>
Where n is 1-3 (there are three instances of Trend_Log objects available)
Log_Enable
W
Binary
Set this to TRUE to enable logging or FALSE to disable logging. The default is
TRUE. The value is set to FALSE internally if logging stops for other reasons (i.e.
buffer is full).
Start_Time
W
Date/Time
Sets the Date/Time when data logging will Start (if Log_enable is TRUE). Set to a
Date/Time earlier than the Local_Date/Local_Time properites of the Device
object and Set Log_Enable TRUE to start logging immediately.
Stop_Time
W
Date/Time
Sets the Date/Time when data Logging will STOP (if still running).
Stop_Time will be ignored if “”wildcard”” values are used in any of the fields.
Log_Device_Object_ Property
W
BACnetDeviceObject
ProptertyReference
Set (point) this to the Present_Value of any of objects AI1 through AI49 to
establish which parameter to log. Default values are:
TL1 = Real Energy Consumption (Array of AI1 Present_Value)
TL2 = Reactive Energy Consumption (Array of AI27 Present_Value) TL3 = Total Real
Power Present Demand (Array of AI34 Present_Value)
Log_Interval
W
0.01 seconds
Logging period in hundredths of a second.
Default is 90000 (15 minute intervals); minimum value is 1000 (10 seconds). This
property can also be set to Zero, which will change all three Trend_Logs and the
Demand calculation to a manual mode (sometimes referred to as “Sync to
Comms”. In manual mode, the demand interval is updated and another record is
logged upon a manual command, which is issued by writing the value 21211 to
the Present_Value of object AV1.
Stop_When_Full
W
Binary
Set this to TRUE to stop logging when the buffer is full (single-shot mode) or
FALSE to continue when full (wrap & overwtrite oldest data entries).
Buffer_Size
R
5760
Length of Log Data buffer (# of records).
Log_Buffer
R
List of BACnetLongRecord
Contains the data values logged, with timestamps
Record_Count
W
Unsigned 32-bit integer
This is an integer count of how many records logged since the Trend_Log objects
were last reset. Writing a Zero to this property resets the logs of all three objects.
This value defaults to Zero, but, by default, logging will start automatically at 15
minute intervals.
Total_Record_Count
R
Unsigned 32-bit integer
This is an integer count of how many records logged since the Trend_Log objects
were created (the factory state of the meter). This count is unaffected by
resetting the Record Count or by power failures.
Event_State
R
Binary
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A M P1 I NTEG R ATE D POWE R A N D E N E RGY
I N S TA L L AT I O N I N S T R U C T I O N S
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