PLC-API The inverse characteristic curve is calculated from this characteristic curve: In the ideal case, applying these two characteristic curves in series will result in a linear transfer behavior. TS4100 110 Version: 1.1 Control value Valve position arrTable[1,1] := -6; arrTable[1,2] := -100; arrTable[2,1] := -1; arrTable[2,2] := -70; arrTable[3,1] := 1; arrTable[3,2] := 70; arrTable[4,1] := 6; arrTable[4,2] := 100;