Mitsubishi Electric MELSEC FX3U Programming Manual page 520

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
a) In the case of decimal point format
S
+1
S
+2
S
+3
S
+4
S
b) In the case of exponent format
S
+1
S
+2
S
+3
S
+4
S
+5
S
+6
S
• When a character string to be converted into binary floating point specified by
excluding the sign, decimal point and exponent part, the conversion result may contain rounding error.
a) In the case of decimal point format
S
+1
S
+2
S
+3
S
+4
S
+5
S
+6
S
518
b15 b8 b7
31H(1)
30H(0)
38H(8)
32H(2)
1 0 7 8 1
b15 b8 b7
20H(space)
2EH(.)
32H(2)
31H(1)
2BH(+)
30H(0)
1 3 2 0 1
b15 b8 b7
20H(space)
31H(1)
33H(3)
31H(1)
36H(6)
31H(1)
00H
1 3 0 1 5
18.5 FNC117 – EVAL / Character String to Floating Point Conversion
b0
2DH(-)
2EH(.)
37H(7)
31H(1)
00H
2
b0
2DH(-)
31H(1)
33H(3)
30H(0)
45H(E)
31H(1)
00H
E + 1 0
b0
2DH(-)
20H(space)
2EH(.)
30H(0)
35H(5)
38H(8)
32H(2)
6 8 1 2
Rounded.
18 Floating Point – FNC110 to FNC139
+1
D D
−1.07812
Binary floating point
(real number)
+1
D D
−1.3201E+10
Binary floating point
(real number)
has 7 digits or more
S
+1
D D
−1.30156
Up to 6 digits are securely
equivalent.
Binary floating point
(real number)