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IM DL850E-01EN
Target (Target)
The fundamental component of the waveform that you specify here is determined through a discrete Fourier
transform. If the angle is the motor’s angle of rotation and the target is the motor’s drive current, the electrical
angle can be determined.
The options are the same as were described above for basic arithmetic. However, you cannot select an input
channel of a frequency module.
Knocking Filter (Knock Filter; only on the DL850EV)
When the signal level of the waveform that has been set to Source is less than or equal to the elimination level,
the signal of this waveform is set to 0. You can select whether to perform differentiation. You can use this to
extract knocking.
Used as a trigger
Engine cylinder pressure
Only the knocking part
is extracted.
Knocking
Valve opening/closing noise
is eliminated.
Valve opening/closing noise
Elimination level
(noise elimination
level)
Differentiation
turned on
Math Source Waveform (Source)
The options are the same as were described above for basic arithmetic. However, you cannot select an input
channel of a frequency module or a real time math channel (RMath).
Elimination Level
Set the elimination level, which is used to set the input signal to 0.
The range of the elimination level is the same as that of the trigger level.
Differential
Select whether to differentiate the waveform after elimination. A fifth order Lagrange interpolation formula is used
to perform differentiation. For details on the differentiation characteristics, see the appendix in the
Real Time
Math (/G3 option) User’s Manual
, IM DL850E-51EN.
• ON: Differentiation is performed.
• OFF: Differentiation is not performed.
Polynomial with a coefficient (Poly-Add-Sub)
Performs addition or subtraction or both on the waveforms that have been set to Source1, Source2, Source3,
and Source4. You can add or subtract the result of the power calculation, to calculate the multi-phase power.
K (±s1 ±s2 ±s3 ±s4)
K: Coefficient. s1, s2, s3, and s4: Sampling data.
Math Source Waveforms (Source1, Source2, Source3, and Source4)
The options are the same as were described above for basic arithmetic.
Sign
You can set the sign of the sampling data of the math source waveforms to positive or negative.
2 Vertical Axis