AMP1
Analog_value objects
Use the Present_Value property of the Analog_Value object for
all writable variables in the meter other than those used
specifically for BACnet configuration or Time Synchronization
(in the Device Object) or Data Logging (in the Trend_Log
objects).
Values are checked when written, and errors are returned for
invalid entries. This table describes how the meter uses those
variables, what values are valid, and what their defaults are.
When writing values to the Present_Value properties of
Analog_Value BACnet objects, there is a delay of up to about
two seconds to validate and store the new value. An
immediate read of the same property before that delay has
elapsed can return the prior value (even if the new value was
accepted). To read a value immediately after writing it, check
the Reliability property first. When it reports a No_Fault_
Detected status, the Present_Value of the object is current.
These objects support the Description and Reliability object
properties and all required Analog_Value object properties,
but Present_Value is the only writable property.
20
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
For troubleshooting or service related questions, contact ABB at 800-782-8061 or at [email protected]
No.
Name
Description
R/W NV
Units
Range
Factory
Default
Value
Additional information
AV1
Config
Configuration R/W –
n/a
n/a
Always
returns
”0”
when
read
Command Register:
– Write 30078 (0x757E) to clear all energy accumulators to 0 (All).
– Write 21211 (0x52DB) to begin new Demand Sub-Interval
calculation cycle and log another data value on Trend_Log objects
TL1-TL3 (when the meter is in Manual “Sync-to Comms” mode). This
takes effect at the end of the next 1 second calculation cycle. Write
no more frequently than every 10 seconds.
– Write 21212 (0x52DC) to reset Max Demand values to Present
Demand Values. Takes effect at the end of the next 1 second
calculation cycle. Write no more frequently than every 10 seconds.
– Write 16498 (0x4072) to clear pulse counters to 0.
AV2
System_
Type
System Type
R/W NV
n/a
40, 31, 12, 11,
10
40
System_Type:
– Write 10 for Single-Phase: A + N
– Write 11 for Single-Phase: A + B
– Write 12 for Split-Phase: A + B + N
– Write 31 for 3-Phase Á: A + B + C, no N
– Write 40 for 3-Phase Y: A + B + C + N
AV3
CT_Ratio_
Primary
CT Ratio -
Primary
R/W NV
Amps
5-32000
200
Current Transducer Size – Primary Current Range
(Default is set for 100 A CTs)
AV4
CT_Ratio_
Secondary
CT Ratio -
Secondary
R/W NV
1/Volts
1,3
3
Current Transducer Type – Secondary Interface
– Enter 1 for CTs with 1V outputs (Default)
– Enter 3 for CTs with 1/3V outputs
AV5
PT_Ratio
PT Ratio
R/W NV
Value
0.01 - 320.0
1
Potential Transformer Ratio – The default is 1.00 (1:1), which is no PT
attached. Set this value before setting the System Voltage (below).
AV6
System_
Voltage
System
Voltage
R/W NV
Volts
from 82 (times
the PT_Ratio in
AV5) to 660
(times the PT_
Ratio in AV5 –
absolute limits
are 82-32000)
480
System Voltage – This voltage is Line to Line unless in System Type 10 (in
object AV2), in which case it is Line to Neutral. This value is used to by
the meter to calculate the full scale power for the analog outputs and
pulse configuration (see below), and as full scale for phase loss (in
object AV8). Do not set the meter to voltages outside the range of 82-
660 volts times the PT Ratio in object AV5.
AV7
Display_
Units
Display Units
R/W NV
n/a
0,1
1
Display Units: 0 = IEC (U, V, P, Q, S), 1 = IEEE (default: VLL, VLN, W, VAR,
VA)
AV8
Phase_Loss_
Voltage_
Threshold
Phase Loss
Voltage
Threshold
R/W NV
Percent
1-99
10
Phase Loss Voltage Threshold in percent of System Voltage (in object
AV6). Default is 10 (10%). Any phase (as configured in AV2) whose level
drops below this threshold triggers a Phase Loss alert – i.e. if the System
voltage is set to 480 V L-L, the L-N voltage for each phase should be 277
V. When the threshold is set to 10%, if any phase drops more than 10%
below 277 V, (less than 249 V), or if any L-L voltage drops more than 10%
below 480 V (less than 432 V) the corresponding phase loss alarm bit
will be true.
AV9
Phase_ Loss_
Imbalance_
Threshold
Phase Loss
Imbalance
Threshold
R/W NV
Percent
1-99
25
Phase Loss Imbalance Threshold in Percent. Default is 25% phase to
phase difference. For a 3-phase Y (3 + N) system type (40 in object AV2),
both Line to Neutral and Line to Line voltages are tested. In a 3-phase Á
System type (31 in object AV2), only Line to Line voltages are examined.
In a single split-phase (2 + N) system type (12 in object AV2), only the line
to neutral voltage are compared.
AV10 Subintervals
Number of
Subintervals
Per Demand
Interval
R/W NV
1-6
1
Number of Sub-Intervals per Demand Interval. Sets the number of sub-
intervals that make a single demand interval. For block demand, set this
to 1. Default is 1. When Sub-Interval Length (in object AV11) is set to 0
(sync-tocomms mode), the meter ignores this value.
AV11
Subinterval_
Length
Subinterval
Length
R/W NV
hundreths
of a
second
0, 10-32767
90000
Sub-Interval Length in hundredths of a second. For sync-to-comms
mode, which allows manual triggerring of demand intervals and the
logging of another Trend_ Log record, set this value to 0 and write 21211
to the reset register (object AV1) each time the sub-interval must be
externally reset. Default is 90000 (15 minutes). This variable is tied
directly to the Log_Interval property of all three Trend_Log objects
(their value is always the same as this one). Changing any of these four
properties changes all of them.
