11-6
IM 253710-01E
Explanation
An equation can be created by combining the symbols of each channel. Then, the
waveform of the equation can be displayed.
Turning ON/OFF the computation of the equation
Select whether or not to compute the specified equation.
• OFF
Does not compute the equation.
• ON
Computes the equation.
Setting the equation
Two equations can be created. Each equation can have up to 16 operands.
However, for TREND (including TRENDM, TRENDD, and TRENDF) and FFT
functions, only one operand can be used from the following: C1 to C8, C1
∗
C2,
C3
∗
C4, C5
∗
C6, or C7
∗
C8.
• Operands
C1 to C8, which correspond to CH1 to CH8, can be used as operands when
constructing the equation. However, for TREND and FFT functions, only one
operand can be used from the following : C1 to C8, C1
∗
C2, C3
∗
C4, C5
∗
C6, or
C7
∗
C8.
• Operator
The following operators can be used to create the equation. TINTG (integral),
TINTG (integral), TREND (including TRENDM, TRENDD, and TRENDF), AVG,
SSP, SLIP, and PM are available as special functions. For details regarding these
special functions see section 1.8, “Waveform Analysis.”
Operator
Example
Description
+, –,
∗
, /
C1+C2
Basic arithmetic of the specified waveform
ABS
ABS(C1)
Absolute value of the specified waveform
SQR
SQR(C1)
Square of the specified waveform
SQRT
SQRT(C1)
Square root of the specified waveform
LOG
LOG(C1)
Natural logarithm of the specified waveform
LOG10
LOG10(C1)
Common logarithm of the specified waveform
EXP
EXP(C1)
Exponentiation of the specified waveform
NEG
NEG(C1)
Add a minus sign to the specified waveform
DIF
DIF(C1)
The differentiation of the specified waveform
TINTG
TINTG(C1)
Integration of the specified waveform
TREND
TREND(C1
∗
C2)
The trend of the specified waveform
TRENDM, TRENDD, and TRENDF can also be specified in
a similar fashion. For details, see section 1.8.
AVG2
AVG2(C1
∗
C2)
The average waveform of the specified waveform,
attenuation constant of 2
AVG4
AVG4(C1
∗
C2)
The average waveform of the specified waveform,
attenuation constant of 4
AVG8
AVG8(C1
∗
C2)
The average waveform of the specified waveform,
attenuation constant of 8
AVG16
AVG16(C1
∗
C2)
The average waveform of the specified waveform,
attenuation constant of 16
AVG32
AVG32(C1
∗
C2)
The average waveform of the specified waveform,
attenuation constant of 32
AVG64
AVG64(C1
∗
C2)
The average waveform of the specified waveform,
attenuation constant of 64
SSP
SSP
Synchronous speed waveform
SLIP
SLIP
Slip waveform
PM
PM
Waveform of the motor output
FFT
FFT(C1)
The FFT of the specified waveform (see section 11.3)
*
Functions TRENDM, TRENDD, TRENDF, SSP, SLIP, and PM are applicable to products
(PZ4000) with firmware version 2.01 or later.
11.2 Setting the Equation, Converting the Scale of the Computed Waveform