Mitsubishi Electronics FR-A700, 700 Series specifications DEC Decimal Code BIN Binary Code

Numerical Values Usable in Sequence Program

3.8.1BIN (Binary Code)

(1) Binary code

BIN is a numerical value represented by 0s (OFF) and 1s (ON).

In the decimal code, a number is incremented from 0 to 9, and at this point, a carry occurs and the number is incremented to 10.

In BIN, 0, 1 are followed by a carry, and the number is incremented to 10 (2 in decimal).

Table 2.2 indicates the numerical representations of BIN and decimal code. Table 3.2 Differences between Numerical

Representations of BIN and Decimal Code

DEC (Decimal Code)	BIN (Binary Code)
0	0000
1	0001	Carry
2	0010
3	0011	Carry
4	0100
5	0101
6	0110
7	0111	Carry
8	1000
9	1001
10	1010
11	1011

(2)Numerical representation of BIN

1)Each register (e.g. data register) of the built-in PLC function consist of 16 bits. Each bit of the register is assigned a 2n value.

However, the most significant bit is used to judge whether the value is positive or negative.

•Most significant bit is 0 ..... Positive

•Most significant bit is 1 ..... Negative

The numerical representation of each register of the built-in PLC function is shown in Fig. 2.8.

	Most significant bit (for judgment of positive/negative)
Bit name	b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0

SEQUENCE PROGRAMMING

215	214	213	212	211	210	29	28	27	26	25	24	23	22	21	20
=	=	=	=	=	=	=	=	=	=	=	=	=	=	=	=
Decimal value -32768 16384 8192 4096 2048 1024 512 256 128									64	32	16	8	4	2	1

Value is negative if most significant bit is 1.

Fig 3.9 Numerical Representation of Each Register of Built-in PLC Function

2)Numerical data usable with the built-in PLC function

In the numerical representation shown in Fig. 2.8, values can be represented in

3

73