MOVE Assign one value to another.
SEL Returns one of two values depending on a BOOL value.
MAX Returns the highest value input.
MIN Returns the lowest value input.
LIMIT Returns a value limited to a maximum or minimum.
MUX Return one of N values depending on an integer selector value.
Table 27 - IEC 61131-3 Second Edition.
Table 32 - IEC 61131-3 Third Edition.