IEC operator⮫ “Overview”: Returns the arc cosine (inverse function of cosine) of a number. The value is calculated in radians.
IN can be type BYTE, WORD, DWORD, INT, DINT, REAL, SINT, USINT, UINT, UDINT, OUT must be type REAL.
Example in ST:
q:=ACOS(0.5);
Example in FBD:
