Fnc279 - Wbfm / Divided Bfm Write - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
31.2 FNC279 – WBFM / Divided BFM Write
Outline
This instruction writes data to continuous buffer memories (BFM) in a special function block/unit over several
operation cycles by the time division method. This instruction is convenient for writing send data, etc. to
buffer memories in a special function block/unit for communication by the time division method.
TO (FNC 79) instruction is also available for writing data to the buffer memory (BFM).
1. Instruction format
FNC 279
WBFM
2. Set data
Operand Type
m1
m2
S
n1
n2
3. Applicable devices
Bit Devices
Oper-
and System User
Type
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
m1
m2
S
n1
n2
: Except special data register (D)
Mnemonic
16-bit Instruction
11 steps WBFM
Unit number [0 to 7]
Head buffer memory (BFM) number [0 to 32766]
Head device number storing data to be written to buffer memory (BFM)
Number of all buffer memories (BFM) to be written [1 to 32767]
Number of points transferred in one operation cycle [1 to 32767]
Digit Specification
31 Data Transfer 3 – FNC275 to FNC279
31.2 FNC279 – WBFM / Divided BFM Write
→ For TO (FNC 79) instruction, refer to Section 15.10.
Operation Condition
32-bit Instruction
Continuous
Operation
Description
Word Devices
Special
System User Index
Unit
V Z Modify K H
Mnemonic Operation Condition
−
Data Type
16-bit binary data
Others
Con- Real Charac-
Pointer
stant Number ter String
E " " P
745
31
32
33
34
35
36
37
38
A
B