Fixed setpoints
Description
n11 / n21 = "0" and n12 / n22 = "0":
External setpoints only
n11 / n21 = "1" and n12 / n22 = "0":
n11/n21
n11 / n21 = "0" and n12 / n22 = "1":
n12/n22
n11 / n21 = "1" and n12 / n22 = "1":
n13/n23
