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Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
5 How to Specify Devices and Constants to Instructions
5.5 Bit Specification of a Word Device (D[ ].b)
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 : 0 to F (hexadecimal)
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
D0.F
D0.3
D0
F E D C B A 9 8 7 6 5 4 3 2 1 0
16 bits
Transfer
source
Transfer
destination
Unit number BFM #10
Example of MOV
instruction
Example of indexing
BFM number
FNC 12
MOV
K10 U0\G10
Transfer
source
Transfer
destination
FNC 12
MOV
K20
U0\G10Z0
Unit number BFM #(10 + Z0)