Mitsubishi Electric MELSEC FX3U Programming Manual page 745

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
• Do not stop the driving of the instruction while it is being executed. If driving is stopped, the buffer memory
(BFM) reading/writing processing is suspended, but the data acquired in the middle of reading/writing
processing is stored in
Command
input
M
M8029
Instruction execution complete
• When indexing is executed, the contents of index registers at the begining of execution are used.
Even if the contents of index registers are changed after the instruction, such changes do not affect the
process of the instruction.
• The contents of "n1" devices starting from
After execution of the instruction is completed, execute another instruction for "n1" devices starting from
.
D
• Do not update (change) the contents of "n1" devices starting from
is executed. If the contents are updated, the intended data may not be written to the buffer memories
(BFM).
• Do not update (change) the contents of "n1" buffer memories (BFM) starting from the buffer memory No.
"m2" while RBFM (FNC278) instruction is executed. If the contents are updated, the intended data may
not be read.
and later and buffer memories (BFM).
D
FNC278
m1 m2
RBFM
31 Data Transfer 3 – FNC275 to FNC279
31.1 FNC278 – RBFM / Divided BFM Read
SET M
D n1 n2
RST M
change while RBFM (FNC278) instruction is executed.
D
S
while WBFM (FNC279) instruction
31
32
33
34
35
36
37
38
A
B
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