Mitsubishi Electric MELSEC FX Series - Page 461

7 Applied Instructions
7.12 Floating Point
459
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of Instruction
4
How to Read Explanation of Instructions
5
Basic Instruction
6
Step Ladder Instructions
7
Applied Instructions
8
Interrupt Function and Pulse Catch Function
A
Relationships between devices and addresses
• The converted character string data is stored in the device after as follows.
- For the sign of integer part, "20H" (space) is stored when the binary floating decimal point data is
positive, and "2DH" (-) is stored when negative.
- The integer part is fixed in one digit.
Between the integer part and the sign, "20H" (space) is inserted.
- When the decimal part of binary floating decimal point data does not settle within the decimal digits, the
lower decimal digits are rounded off.
- When the number of decimal digits is set in other than "0", automatically "2EH" (.) is stored at the
specified decimal digits + 1 digit.
However, when the number of decimal digits is "0", "2EH" (.) is not stored.
- For the sign of exponential part, "2BH" (+) is stored when the index is positive, and "2DH" (-) is stored
when negative.
- The exponential part is fixed in two digits.
When the exponential part is one digit, between the exponential part and the sign, "30H" (0) is inserted.
- "00H" or "0000H" is automatically stored at the end of the converted character string.
Cautions
When handling character string data or 32-bit data in structured program, you cannot specify 16-bit device
directly unlike the simple project. When handling character string data or 32-bit data, please use the label.
However, the 32-bit counter is a 32-bit long device, and can be specified directly. When specifying the device,
use the global label.
1
12
4
+1
+2
All digits (12)
0
"20H" (space) is inserted.
2 3 4 6 E + 11
1 digit fixed
+1
-12.34567
s1
s2
s1
s2
s2
1
12
4
+1
+2
All digits (12)
02 3 4 6 E + 11 67
Number of digits
below decimal point (4)
Rounded and discarded.
+1
-12.34567
s1
s2
s1
s2
s2
1
12
4
+1
+2
All digits (12)
02 3 4 6 E + 11
Number of digits below decimal point (4)
Added automatically.
+1
-12.34567
s1
s2
s1
s2
s2
1
12
4
+1
+2
All digits (12)
0
"30H" (0) is inserted.
2 3 4 6 E + 11
2 digits fixed
+1
-12.34567
s1
s2
s1
s2
s2