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7 OPERATION CONTROL PROGRAMS
F/FS G
7.6.5 Arccosine : ACOS
Format ACOS(S) Number of basic steps 2
[Usable data]
Usable Data
Word device Constant
Setting
data
Bit device
16-bit
integer
type
32-bit
integer
type (L)
64-bit
floating
point
type (F)
Coasting
timer
16-bit
integer
type (K/H)
32-bit
integer type
(K/H, L)
64-bit
floating
point
type (K)
Calculation
expression
Bit
conditional
expression
Comparison
conditional
expression
(S) —
— —
: Usable
[Setting data]
Setting data Description Data type of result
(S)
COS value data on which COS
-1
(arccosine)
operation will be performed
Floating-point type
[Functions]
(1) COS
-1
(arccosine) operation is performed on the COS value data specified with
(S) to find an angle.
(2) The COS value specified with (S) must be within the range -1.0 to 1.0.
(3) The operation result is in an angle (degree) unit.
(4) If (S) is an integer type, it is converted into a floating-point type before operation is
performed.
[Errors]
(1) An operation error will occur if:
• (S) is outside the range -1.0 to 1.0; or
• (S) is an indirectly specified device and its device No. is outside the range.
[Program examples]
(1) Program which performs the COS
-1
(arccosine) operation of D0F and substitutes
the result to #0F
#0F = ACOS(D0F)
#3 #2
60.0
#1 #0
D3 D2
0.5
D1 D0