ParametersParameter Declaration Data Type Memory Area DescriptionEN INPUT BOOL I, Q, M, D, L n Enable– TRUE: activates the function– FALSE: deactivates the functionENO OUTPUT BOOL I, Q, M, D, L n Status– TRUE: function executed with errorIn the event of an error, if the input value is not in the range of -1 ... +1, the function setsthe RLO signal state ENO to TRUE. The assignment of the remaining registers and theauxiliary flags are not changed.This function is only used to convert the FB 108 of an existing S5 pro-gram to a function of an S7 program programmable controller.15.4.9 FC 120 - Naperian Logarithm In(x) - Naperian LogarithmThe function FC 120 expects the input value in accumulator 1 as a floating point number.1. The input value must be within the range between-1 (REAL = -0.1000000e+01) and +1 (REAL = +0.1000000e+01).2. The function also stores the result in accumulator 1 as a floating point number.3. If the calculation is carried out correctly, the RLO is FALSE after the function hasbeen called up.ParametersParameter Declaration Data Type Memory Area DescriptionEN INPUT BOOL I, Q, M, D, L n Enable– TRUE: activates the function– FALSE: deactivates the functionENO OUTPUT BOOL I, Q, M, D, L n Status– TRUE: function executed with errorIn the event of an error, the function sets the ENO to signal state TRUE (if the input valueis less than or equal to zero). In this case, the contents of accumulator 1 remainunchanged. The assignment of the remaining registers and that of the auxiliary flags arenot changed.This function is only used to convert the FB 109 of an existing S5 pro-gram to a function of an S7 program programmable controller.Error informationDescriptionError informationVIPA SPEED7 StandardS5 Converting > FC 120 - Naperian Logarithm In(x) - Naperian LogarithmHB00 | OPL_SP7 | Operation list | en | 18-30 831
