Siemens SENTRON PAC4220 - A.1.9 Harmonic Components of All Harmonics

A.1.9 Readout of harmonic components of all harmonics with function codes
0x03 and 0x04
For clar
ity, only the 1st and the 64thharmonics are listed in the table.
Formula
The o󹪜sets of the 2nd to 63rdharmonics can be calculated using the formula below:
2IIVHWRIQWKKDUPRQLF RIIVHWRIVWKDUPRQLFOHQJW
K[Q෥
nth - stands for the number of the harmonic
Exam
ple 1
Calculation of o󹪜set of "3rd harmonic voltageL1-N" (FC0x14):
• 5 + 2x (3 − 1) = 9
• O󹪜set of "3rd harmonic voltageL1-N" (FC0x14) is 9.
Example 2
Calculation of o󹪜set of "3rd harmonic voltageL1-N" (FC0x3):
• 36005 + 2x (3 − 1) = 36009
• O󹪜set of "3rd harmonic voltageL1-N" (FC0x3) is 36009.
Example 3
Calculation of o󹪜set of "7th max. harmonic voltageL1-N" (FC0x3):
• 37201 + 4x (7 − 1) = 37225
• O󹪜set of "7th max. harmonic voltageL1-N" (FCx03) is 37225.
Table
Note the following:
• The voltage harmonics are expressed in [%] relative to the fundamental.
• The fundamental is expressed absolutely in [V].
• The current harmonics are expressed absolutely in [A].
Length O󹪜set
FC0x03
FC0x04
Name Format Unit Access
2 36005 1st harmonic voltageL1-N FLOAT V R
2 See
formula
nt
h Harmonic voltageL1-N FLOAT % R
2 36131 64th harmonic voltageL1-N FLOAT % R
2 36133 1st harmonic voltageL2-N FLOAT V R
Appendix
A.1Modbus
PAC4220
126 Equipment Manual, L1V30827278B-01