Bit Device Processing Method; 1-Bit Processing; Digit Specification Processing - Mitsubishi Electric A800 Programming Manual

3.20

Bit device processing method

Processing methods available for when a bit device (X, Y, M) is specified are 1-bit processing, and 16-bit and 32-bit
processing which are accompanied by digit specification.
3.20.1

1-bit processing

When sequence instructions are used, the device that is the operation processing target is 1 bit (1 point) of the bit device, and
multiple bits cannot be specified.
Example LD X0, OUT Y20
3.20.2

Digit specification processing

When basic instructions or application instructions are used, there are situations in which the bit device that is the operation
processing target needs to be specified with digit specification. When the processing increment of this digit specification is a
16-bit instruction, up to 16 points can be specified in 4-point increments.
16-bit instruction: K1 to 4 (4 to 16 points)
Setting range from 16-bit data digit specification of X0 to F
Example
• When there is a digit specification on the source (S) side, the values that can be handled as source data are indicated in
the table below.
16-bit instruction
Designation range of K4
(16 points)
Specified number of digits
K1 (4-point)
K2 (8-point)
K3 (12-point)
K4 (16-point)
Ladder example
Source (S) data

Bit device processing method

Designation range
of K1
(4 points)
Designation range of K2
(8 points)
Designation range of K3
(12 points)
16-bit instruction
0 to 15
0 to 255
0 to 4095
-32768 to 32767
Process
Change to 0.
Sequence program
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