Conversion Of Numeric Values; Handling Of Numeric Values In Floating Point Operations - Mitsubishi Electric MELSEC-Q Structured Programming Manual

FXCPU Structured Programming Manual
[Device & Common]
3.1.2

Conversion of numeric values

Numeric values handled in FX PLCs can be converted as shown in the table below.
Decimal number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
99
Major applications
Decimal number
Constants (K) and
numbers of internal
devices except input
relays and output relays
3.1.3

Handling of numeric values in floating point operations

Handling of numeric values in floating point operations
Binary integers are handled inside PLCs.
In division of integers, the answer "40 / 3 = 13 ... 1" is obtained, for example.
In squire root extractions of integers, the portion after the decimal point is truncated.
In PLCs, floating point operations are available to achieve higher accuracy in such operations.
FX /FX /FX /FX
0S 0 0N
3.1 Numeric Values Handled in PLCs (Octal, Decimal, Hexadecimal and Real Numbers)
Octal number Hexadecimal number
0
1
2
3
4
5
6
7
10
11
12
13
14
15
16
17
20
143
Octal number Hexadecimal number
Numbers of internal input
Constants (H)
relays and output relays
/FX /FX /FX /FX PLCs do not support floating point operations.
1S 1N 1NC U 2C
3 How to Specify Devices and Constants in Instructions
Binary number
00 0000 0000
01 0000 0001
02 0000 0010
03 0000 0011
04 0000 0100
05 0000 0101
06 0000 0110
07 0000 0111
08 0000 1000
09 0000 1001
0A 0000 1010
0B 0000 1011
0C 0000 1100
0D 0000 1101
0E 0000 1110
0F 0000 1111
10 0001 0000
63 0110 0011
Binary number
Processing inside PLC
BCD
0000 0000
0000 0001
0000 0010
0000 0011
0000 0100
0000 0101
0000 0110
0000 0111
0000 1000
0000 1001
0001 0000
0001 0001
0001 0010
0001 0011
0001 0100
0001 0101
0001 0110
1001 1001
BCD
BCD digital switches and
seven-segment display
units
125
1
2
3
4
5
6
7