NetLinx Programming
13
NXA-PDU-1508-8 Power Distribution Unit (240V / 10A)
Levels
Power (W):
Resolution to 0.1W (data scale factor = 10)
Current (A)
: Resolution to 0.1A (data scale factor = 10)
Voltage (V):
Resolution to 0.1V (data scale factor = 10)
Power Factor:
W/VA, 2 decimal places (data scale factor = 100).
"Power Factor " is the ratio of real power to apparent power.
Energy (W-hr):
Power over time, resolution to 0.1W-hr
(Data scale factor = 10, writing 0 resets counter)
Temp (Degrees C or F):
Resolution to 0.1C (data scale factor = 10)
Resetting Level 4 (Accumulated Energy Reading)
The Level 4 value (accumulated energy reading) can be reset to 0 (zero) in three ways:
1.
When the PDU is reset or power cycled, Level 4 will go to 0 on all outputs (see
Powering On the
NXA-PDU-1508-8
on page 9).
2.
If
SEND_LEVEL <PDU dev>,4,0
is sent, Level 4 will go to 0 on that output (if not already at 0).
3.
The max value of the level is
65535
, if that is exceeded the level will roll over to 0.
Overcurrent Reporting
The PDU reports alerts of overcurrent via the following AxLink string:
OVERCURRENT-<Outlet #>=<Current>
16-bit Level
Dev 1
Dev 2
Dev 3
Dev 4
Dev 5
Dev 6
Dev 7
Dev 8
1
Power
Power
Power
Power
Power
Power
Power
Power
2
Current
Current
Current
Current
Current
Current
Current
Current
3
Power Factor
Power Factor
Power
Factor
Power
Factor
Power
Factor
Power
Factor
Power
Factor
Power
Factor
4
Energy
Energy
Energy
Energy
Energy
Energy
Energy
Energy
5
Input Voltage
Ax Voltage
6
Ax 1 Power
Ax 2 Power
7
Ax 1 Current
Ax 2 Current
8
Temp
For power factor, AMX has added an offset of 100 to the value to cope with the
possibility of negative numbers. To obtain the correct value of the power factor, first
subtract 100 from the level returned by the PDU, then divide by 100.
Example:
fPowerFactor1 = (LEVEL.VALUE-100)/100.0 //NB fPowerFactor1 is a FLOAT
variable”
The level range is 0-200.
If reporting overcurrent for the entire unit, the outlet # is specified as
0
(zero).
Содержание NXA-PDU-1508-08
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