6. Function blocks6.1 Manufacturer function blocks6.1.4.5 VC - Value limitationGeneraleasyE4 base devices provide 32 value limitation functionblocks, VC01 through VC32.These function blocks can be used to output values within spe-cific limits.Operating principleThe lower and upper limits are set using function block inputs SL (Low) and SH (High).The value at function block output QV will follow the value at function block input I1 aslong as the latter falls within the limits. Values outside of the range will be truncatedaccordingly.EN = 0 will carry out a reset and function block output QV will be set to a value of 0.Figure 160: Figure: Restriction of the input values to the specified limits.SL: Lower limit I1: Input function at I1SH: Upper limit QV: Bounded output function at QVThe function block and its parametersFunction block inputsDescription Note(Bit)EN 1: Activates the function block. The checkbox for theFunction block release by EN is302 easyE4 11/18 MN050009 EN www.eaton.com
