Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 171)

Publication 1404-UM001F-EN-P - November 2009 171
Advanced Features Chapter 8
Harmonic Distortion
The power monitor calculates the magnitude of each individual
harmonic with respect to the fundamental. Results are calculated for
harmonics 1…41 (M6) or 1…63 (M8) for all 7 voltage and current
channels. Each result is expressed as a percentage of the fundamental.
Configuring Harmonic Analysis
You may configure harmonic analysis only via communication. The
display module does not support harmonic analysis configuration.
Configure harmonic analysis by performing a table write to the
Harmonic Analysis Configuration/Read-back Select table. This
read/write table of nine integer elements comprises the following
configuration parameters.
•
Password: needed to enable or disable harmonic analysis or
write the maximum short-circuit and demand current
parameters. Not needed for read-back select, use -1. Default
0000
•
Channel: Specifies the channel of harmonic data to obtain in the
next read of Table 33. 1 = V1, 2 = I1, 3 = V2, 4 = I2, 5 = V3, 6 =
I3, 7 = I4, 8 = avg. of voltage channels, 9 = avg. of current
channels. On a read, indicates the last selection made. Default 1
•
Read-back mode: selects read-back mode for the Harmonic
Results; THD, Crest Factor, and More table. Range 0…1,
default 0. See below
•
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…9999 (integer), -4 to 21 (exponent), defaults are 0.
•
… used for IEEE-519 TDD calculation, expressed in
integer/exponent format. Range 0…9999 (integer), -4… 21
(exponent), defaults are 0.
TIP
The remaining elements listed below are reserved in the M4 and M5
models, return 0 on a read and must be 0 on a write.