Publication 1766-RM001A-EN-P - October 2008
Math Instructions
223
DEG - Radians to
Degrees
Instruction Type: output
The DEG instruction converts the Source(in radians) to degrees and store
the result in the Destination.
The following formula applies:
Source * 180/
Π
where
Π
= 3.141592
ATN Instruction Operation
Inputs
Conditions
Output
Source Type
Destination
Type
S:2/14
S:0/3-0
S, Z, V, C
S:5/0
Destination
W,DW, F
F
X
Source >= 0
0,0,0,0
L
Atan(Source)
(1)
DNRM
F
X
X
0,1,0,0
L
0
W,DW, F
F
X
Source < 0
1,0,0,0
L
Atan(Source)
W,DW, F
W, DW
X
Atan(Source) >= 0.5
0,0,0,0
L
Rnd(Atan(Source))
W,DW, F
W, DW
X
-0.5 < Atan(Source) < 0.5
0,1,0,0
L
0
W,DW, F
W, DW
X
Atan(Source) < -0.5
1,0,0,0
L
Rnd(Atan(Source))
X
F
X
Source = +INF
0,0,0,0
1
π
/2
X
F
X
Source = -INF
1,0,0,0
1
-
π
/2
(2)
X
F
X
Source is NAN
0,0,1,0
1
0x7FFFFFFF
(3)
X
W
X
Source is NAN
0,0,1,0
1
32767
(3)
X
DW
X
Source is NAN
0,0,1,0
1
2147483647
(1) All denormalized inputs shall be treated as plus zero. Any underflow result shall produce plus zero.
(2) If the Destination is floating point, all overflows shall produce NAN(0x7FFFFFFF).
(3) If the Destination is word or double-word, and an overflow occurs, destination shall be 32767 for Word and 2147483647 for Double Word.
AB
S
Radians to Degrees
S
ource
N7
:
0
0<
Dest
N7
:
1
0<
DEG
Execution Time for the DEG Instruction
Controller
Data Size
When Rung Is:
True
False
MicroLogix 1400
word
27.7310 µs
0.4106 µs
long word
31.2470 µs
0.4098 µs
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