SUBROUTINE CYCLE_TIME_CONV(ConvType, DataIo, SubrLabel, ReturnedValue) * begin condition pre: post: end condition $insert logical equ valid$ to 0 ;* successful equ invalid_msg$ to 1 ;* bad data - print error message window equ invalid_conv$ to 2 ;* bad conversion - " " equ invalid_nomsg$ to 3 ;* bad but do not print the error message window status() = Valid$ begin case case ConvType = 'ICONV' ReturnedValue = DataIo case ConvType = 'OCONV' begin case case DataIo = 'P' ReturnedValue = 'Priority' case DataIo = 'E' ReturnedValue = 'Express' case DataIo = 'F' ReturnedValue = 'FiFo' end case case otherwise$ status() = invalid_msg$ end case return