Allen-Bradley Powermonitor 3000 User Manual page 161

Allen-Bradley HMIs
The remaining elements listed below are reserved in
TIP
the M4 and M5 models, return 0 on a read and must
be 0 on a write.
• Individual harmonic data type: selects% distortion (0) or
magnitude (1) on subsequent reads of the individual results
tables. Default 0
• Enable disable harmonic analysis: 0 disables, 1 enables
calculation of TIF, K-factor, IEEE-519 and individual harmonics
results. Default 1
• IEEE-519 maximum short-circuit current: used for IEEE-519
pass/fail calculation, expressed in integer/exponent format.
Range 0 to 9999 (integer), -4 to 21 (exponent), defaults are 0.
• IEEE-519 maximum demand load current: used for IEEE-519
TDD calculation, expressed in integer/exponent format. Range 0
to 9999 (integer), -4 to 21 (exponent), defaults are 0.
Readback Mode
The data client uses the indexed read method to read harmonic
analysis and individual harmonic data. The options are:
• Auto-increment (0): increments the channel after each read of
Table A.34. This also controls the read-back channel for
individual harmonics results tables. If you use the
auto-increment mode, read any desired individual harmonic
data for the current channel before the next read of Table A.34.
• Manual-increment (1): successive reads of Table A.34 will
return harmonic results from the current channel.
As with other indexed reads, DeviceNet and Ethernet optional
communications support only manual increment read-back mode so
that the client must write a read-back select message to change the
channel returned in the results table. For all other communications
options, auto-increment read-back mode will provide the highest
communications throughput.
Reading Harmonic Analysis Data
The Powermonitor 3000 presents harmonic analysis results in
Table A.34 Harmonic Results; THD, Crest Factor, and More. This
read-only table contains 9 floating-point elements in the M4 and M5
Advanced Features
Publication 1404-UM001D-EN-E - October 2004
8-11