7. APPLICATION INSTRUCTIONS
7
−
82
MELSEC-A
7.6.5 Special module/special block
1-, 2-word data read
(FROM, FROMP, DFRO, DFROP)
Available Device
Bit device
Word (16-bit) device
Constant
Pointer
Level
Ca
rr
y
fla
g
Err
o
r
fla
g
X Y M L S B F T C D W R A0
A1
Z V K H P I N
D
igit specification
Inde
x
M9012 (M9010, M9011)
n1
O
O
n2
O
O
(D)
O O O O O O O O O O
n3
O
O
* O
O
*: K1 to K4 when the FROM(P) instruction is used. K1 to K8 when the DFRO(P) instruction is used.
Function FROM
Reads the n3 words of data from the buffer memory address specified by n2 in the
special module/special block specified by n1 and writes the data to the A1FXCPU
beginning with the device number specified by (D).
AnS
AnN
AnSH
An A1FX
A3H
A3M
A3V AnA
AnU, A2AS
A2USH-S1
A2USH board
QCPU-A
(A Mode)
A0J2H
A2C
A52G
A73
A3N
board
Applicable
CPU
X X O X X X
X
X X X X
Remark
n3
n3
n1
Sets the position of the special module
or the special block counted from the
A1FXCPU (0 to 7).
n2
The head address of the special module
or the special block where the data is
read.
(D)
The device number of the A1FXCPU
where the read data is stored.
n3
Number of data to be read
Setting data
FROM, DFRO
Indicates the instruction symbol.
n1 (D)
n1 (D)
P
n2
n2
Read commands
Buffer memory in
the special module/
special block
A1FXCPU
n2
Device number
specified by (D)
n3 points
n3 words
Summary of Contents for MELSEC-A series
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