Omega RD100B manual Four Arithmetic Operation, Power and Other Computations, Equation Examples

9.2 Setting the Computing Equation

•Status of the Remote Control Input Terminal (D01 to D05, /R1 option)

The status of the remote control input signal (1 or 0) can be used in the computation. Use D01 to D05 (the number following the letter D is the remote control input terminal number) to specify the status in the equations.

Four Arithmetic Operation

The data that can be used in equations are measured values, computed values, constants, communication input data, and remote control input terminal status.

Equation Examples

•	Addition	01+02
		(Determines the sum of the measured values of channel 1 and channel
		2.)
•	Subtraction	01–02
		(Determines the difference of the measured values of channel 1 and
		channel 2.)
•	Multiplication 01*K03
		(Multiplies constant K03 to the measured value of channel 1.)
•	Division	01/K02
		(Divides the measured value of channel 1 by constant K02.)

Note

By setting an equation similar to the one shown below, you can determine the accumulation of a specified channel (in this case channel 01) and make the result the computed value of computation channel 0A.

Computing equation of computation channel 0A: 0A+01

Power and Other Computations

The data that can be used in equations are measured values, computed values, constants, communication input data, and remote control input terminal status. You can nest a computing element inside the parentheses of another computing element.

Equation Examples

•	Power	01**02
		(Determines the measured value of channel 1 to the power of
		the measured value of channel 2.)
•	Square root	SQR(02)
		(Determines the square root of the measured value of channel
		2.)
•	Absolute value	ABS(02)
		(Determines the absolute value of the measured value of
		channel 2.)
•	Common logarithm	LOG(01)
		(Determines the common logarithm (log10) of the measured
		value of channel 1.)
•	Exponent	EXP(01)
		(Determines e to the power of the measured value of channel
		1.)

Note

You can determine the natural logarithm by setting an equation like the following.

From logbX = logaX/loga, we obtain logeX = log10X/log10e

Hence, to determine the natural logarithm of channel 1, we set

Constant	K01 = 0.43429(log10e)
Computing equation	and set the equation to LOG(01)/K01.

9

Operations Related to the Computation Function (/M1 Option)

9-5