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7 OPERATION CONTROL PROGRAMS
F/FS G
7.6.11 Round-off : RND
Format RND(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) Data whose fractional portion will be rounded off Data type of (S)
[Functions]
(1) The rounded-off fractional portion value of the data specified with (S) is found.
(2) If (S) is a negative number, the absolute value of (S) is found and its fractional
portion is rounded off and signed.
(3) If (S) is an integer type, its value is returned unchanged, with no conversion
processing performed.
[Errors]
(1) An operation error will occur if:
• (S) is an indirectly specified device and its device No. is outside the range.
[Program examples]
(1) Program which finds the rounded-off fractional portion value of D0F and
substitutes the result to #0F
#0F = RND(D0F)
#3 #2
34.0
#1 #0
D3 D2
33.54
D1 D0
(2) Program which finds the rounded-off fractional portion value of D4F and
substitutes the result to #0F (when D4F is a negative number)
#0F = RND(D4F)
#3 #2
-33.0
#1 #0
D7 D6
-33.44
D5
D4