Bit Device Processing Method; 1-Bit Processing; Digit Designation Processing - Mitsubishi Electric 700 Series Programming Manual

3.20 Bit Device Processing Method

As the processing method when the bit device (X, Y, M) is specified, 1-bit processing
and 16-bit processing using digit designation processing are available.

3.20.1 1-bit processing

When a PLC instruction is used, the device used as the target of operation processing
is one bit (one point) of bit device, and multiple bits cannot be specified.
Example
LD XO,OUT

3.20.2 Digit designation processing

When a basic or application instruction is used, the bit device used as the target of
operation processing may have to be specified by digit designation. When the
instruction whose processing unit is 16 bits is specified by this digit designation, up to
16 points can be specified in units of four points.
(1) 16-bit instruction: K1 to 4 (4 to 16 points)
Example
Setting ranges of 16-bit data, X0 to F, by digit designation
Fig 3.25 Digit Designation Setting Range for 16-bit Instruction
(a) When there is digit designation on the source (S) side, the numerical values
that can be handled as the source data are as indicated in Table 3.6.
Table 3.6 List of Designated Digits and Numerical
Values That Can Be Handled
Number of Designated Digits
K1 (4 points)
K2 (8 points)
K3 (12 points)
K4 (16 points)
Designation range of K2
Designation range of K3
(12 points)
Designation range of K4
(16 points)
16-bit Instruction
0 to 15
0 to 255
0 to 4095
-32768 to 32767
Bit Device Processing Method
Designation range
of K1
(4 points)
(8 points)
3
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