GE PACSystems RX7i Cpu Programmer's Reference Manual

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GE PACSystems RX7i Cpu Programmer's Reference Manual Manual pdf 252 page image

Chapter 5. Function Block Diagram (FBD)GFK-2950C February 2018 2375.2.1 EXPT FunctionThe Power of X (EXPT) function raises the value of input IN1 to the powerspecified by the value IN2 and places the result in Q. The EXPT functionoperates on REAL or LREAL input value(s) and place the result in output Q. Theinstruction is not carried out if one of the following invalid conditions occurs:▪ IN1 < 0, for EXPT▪ IN1 or IN2 is a NaN (Not a Number)Invalid operations (error cases) may yield results that are different from thosein the LD implementation of this function.Operands of the EXPT FunctionParameter Description Allowed Types Allowed Operands OptionalSolve Order Calculated by the FBD editor. NA NA NoIN or IN1 For EXP, LOG, and LN, IN contains the REALvalue to be operated on.The EXPT function has two inputs, IN1 and IN2.For EXPT, IN1 is the base value and IN2 is theexponent.REAL, LREAL All except variableslocated in %S—%SCNoIN2 (EXPT) The REAL exponent for EXPT. REAL, LREAL All except variableslocated in %S—%SCNoQ Contains the REAL logarithmic/exponentialvalue of IN or of IN1 and IN2.REAL, LREAL All except constantsand variableslocated in %S—%SCNo