Delta AH500 - Page 640

AH500 Programming Manual
6-472
API Instruction code Operand
Function
2110 $FVAL P
S, D
Converting the string into the
floating-point number
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
S
        
D
       
Pulse instruction 16-bit instruction (5-11 steps) 32-bit instruction
AH500
AH500
-
Symbol:
S
：
Source value Word
D
：
Device in which the conversion
result is stored
Double word
Explanation:
1. The string in S is converted into the floating-point number, and the conversion result is stored
in D.
The end of the string
Floating-point number
Sign
First ASCII code
Second ASCII code
Third ASCII code
Fourth ASCII code
Fifth ASCII code
Sixth ASCII code
Seventh ASCII code
b15
b0
b7
b8
16#00
S
+1
S
+2
S
+3
S
+4
S
(D+1, D)
......
+...
S
......
......
2. The string in S can be the decimal format of the string or the exponential format of the string.
 The decimal format:
b15
b0
b7 b8
16#31H(1)
2D(-)16#
30(0)16# 2E(.)16#
38(8)16#
37(7)16#
16#00
31(1)16#
.
-
1
0
7
8
1
2
32(2)16#
HBF89FFD4
(D+1, D)
S
S
+1
S
+2
S
+3
S
+4
Floating-point number -1.07812
 The exponential format:
b15
b0
b7 b8
16#20( )
2D(-)16#
16#2E(.) 31(1)16#
32(2)16#
33(3)16#
16#00
30(0)16#
.
-
1
3
2
0
1
31(1)16#
16#D044B5D1
(D+1, D)
S
S
+1
S
+2
S
+3
S
+4
S +5
S +6
2B(+)16#
45(E)16#
31(1)16#
30(0)16#
E
+
1
0
-1.3201E+10 Floating-point number