Mitsubishi MELSEC-A series, Programming Manual

Page: 267 / 508

7. APPLICATION INSTRUCTIONS
7
−
65
MELSEC-A
7.6.1 Special function module 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
*2
In
d
e
x
M9012 (M9010, M9011)
n1 O O
n2 O O
(D) O
*1
O
*1
O
*1
O
*1
O
*1
O
*1
O
*1
O O O O O
n3 O O
O O
*1: Bit devices cannot be used with the An and A3H CPUs.
*2: K1 to K4 when the FROM(P) instruction is used. K1 to K8 when the DFRO(P) instruction is used.
Functions FROM
Reads the data of "n3" words, which start at the address specified at "n2" of buffer
memory inside the special function module specified at "n1", and stores the data into
devices which begin with the device specified at (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
O O X O O O O O X O O
Remark
Special function module
buffer memory
CPU module
n2
Device specified at (D)
n3 points n3 words
K1
to
K4
K1
to
K8
n3
n3
n1
Head I/O number of special function
module
n2 Head address of data to be read
(D)
Device number which will store read
data
n3 Number of data to be read
Setting data
FROM, DFRO
Indicates the instruction symbol.
n1 (D)
n1 (D)
P
n2
n2
Read commands
Specified with the upper two digits
when the head I/O number is
expressed in 3 hexadecimal digits.