Bit Specification Of A Word Device (D[ ].B); Direct Specification Of Buffer Memory (U[ ]\G[ ]) - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
5.5

Bit Specification of a Word Device (D[ ].b)

By specifying a bit of a word device, the specified bit can be used as bit data.
When specifying a bit of a word device, use a word device number and bit number (hexadecimal).
(Example: D0.0 ... Indicates the bit 0 of data register (D).)
Indexing is not available for both device numbers and bit numbers.
Target word device : Data register or special data register
Bit number
D0.F
D0 F E D C B A 9 8 7 6 5 4 3 2 1 0
5.6

Direct Specification of Buffer Memory (U[ ]\G[ ])

A buffer memory (BFM) of a special function block or special extension unit can be specified directly.
BFM is 16-bit or 32-bit word data, and is mainly used for operands in applied instructions.
For specifying a BFM, specify the unit number (U) of a special function block or special extension unit and the
BFM number (\G) consecutively.
(Example: U0\G0 ... Indicates the BFM #0 in the special function block or special extension unit whose unit
number is 0.)
Indexing is available for BFM numbers.
The specification range is as follows:
Unit number (U).................0 to 7
BFM number (\G) .............0 to 32766
Example of MOV
instruction
FNC 12
Example of indexing
BFM number
FNC 12
: 0 to F (hexadecimal)
D0.3
16 bits
Transfer Transfer
source destination
K10 U0\G10
MOV
Unit number BFM #10
Transfer Transfer
source destination
K20
U0\G10Z0
MOV
Unit number BFM #(10 + Z0)
5 How to Specify Devices and Constants to Instructions
5.5 Bit Specification of a Word Device (D[ ].b)
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