10-14
IM 253710-01E
• During harmonic measurement mode
U : U( , ), I : I( , ), P : P( , ), S : S( , ), Q : Q( , ),
λ
: LAMBDA( , ),
φ
: PHI( , ),
φ
U : UPHI( , ),
φ
I : IPHI( , ), Z : Z( , ), Rs : RS( , ), Xs : XS( , ), Rp : RP( , ),
Xp : XP( , ), Uhdf : UHDF( , ), Ihdf : IHDF( , ), Phdf : PHDF( , ), Uthd : UTHD( ),
Ithd : ITHD( ), Pthd : PTHD( ), Uthf : UTHF( ), Ithf : ITHF( ), Utif : UTIF( ),
Itif : ITIF( ), hvf : HVF( ), hcf : HCF( ), fU : FU( ), fI : FI( ),
φ
U1-U2 : PHIU1U2( ),
φ
U1-U3 : PHIU1U3( ),
φ
U1-I1 : PHIU1I1( ),
φ
U1-I2 : PHIU1I2( ),
φ
U1-I3 : PHIU1I3( ), Torque: TORQUE( ), Speed: SPEED( ), Slip: SLIP( ), Sync:
SYNC( ),
η
mA: MAETA( ),
η
mA: MBETA( )
• A symbol representing the element to which the measured signal is to be
applied is entered on the left side of the parentheses containing a comma ( ,
). OR followed by the harmonic order is entered on the right side. (E1,OR2)
is an example. Elements 1, 2, 3, 4,
Σ
A, and
Σ
B are represented by the
symbols E1, E2, E3, E4, E5, and E6, respectively.
• One symbol from E1 to E6 can be entered in the parentheses for U( , ) to
LAMBDA( , ).
• One symbol from E1 to E4 can be entered in the parentheses for PHI( , )
to FI( ).
• E5 or E6 can be entered in the parentheses for PHIU1U2( ) to PHIU1I3( ).
• For operands that do not have a comma inside the parentheses, no
harmonic order needs to be specified. Set an harmonic order for
TORQUE( ) only.
• If the harmonic section is set to “ORT,” it represents Total; if it is set to “0
(zero),” it represents DC.
• Operators
The following operators can be used to create the equation.
Operator
Example of use
Description
+, –,
∗
, /
URMS(E1)+URMS(E2)
Basic arithmetic of the measurement functions
U(E1,OR1)–U(E2,OR1)
ABS
ABS(UMN(E1)–UMN(E2))
Absolute value of the measurement function
ABS(P(E1,ORT)+P(E2,ORT))
SQR
SQR(IDC(E1))
Square of the measurement function
SQR(I(E1,OR0))
SQRT
SQRT(ABS(IDC(E1)))
Square root of the measurement function
SQRT(ABS(I(E1,OR3)))
LOG
LOG(UDC(E1))
Natural log of the measurement function
LOG(U(E1,OR25))
LOG10
LOG10(UDC(E1))
Common log of the measurement function
LOG10(U(E1,OR25))
EXP
EXP(UAC(E1))
Exponent of the measurement function
EXP(U(E1,OR12))
NEG
NEG(URMS(E1))
Negation the measurement function
NEG(U(E1,OR12))
• Number and type of characters that can be used in the equation
• Number of characters
50 characters or less
• Types of characters
Characters that are displayed on the keyboard or a space
Note
•
An equation (F1 to F4) cannot be placed inside another equation (F1 to F4).
•
When the measurement/computation range or the equation is changed, do a re-computation.
For information pertaining to changing the measurement/computation range and re-
computation, see section 10.1.
•
If an operand in the equation is undetermined, the computation result displays [-------] (no
data). For example, if a measurement function of a delta computation is in the equation, but
delta computation is turned [OFF] or a measurement function of an element that does not
have a module installed is in the equation, an error message is displayed.
•
When averaging (see section 10.5) is turned [ON], the user-defined function cannot be turned
ON.
10.3 Setting the User-Defined Function