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469
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15.9 FNC 78 – FROM / Read From A Special Function Block
11
FNC3
0-F
NC3
9
R
otati
on and
Shif
t
12
FNC4
0-F
NC4
9
D
ata
O
per
ati
on
13
FN
C
50-FN
C
59
H
igh Speed
Pr
ocess
ing
14
FM
C
60-
FN
C
69
H
andy
In
st
ru
ct
ion
15
FNC7
0-F
N
C7
9
Ex
ter
nal
FX
I/O
D
evice
16
FN
C
80-FN
C
89
Ext
ernal FX
De
vic
e
17
FN
C
100-
FN
C
109
Da
ta
Transf
er 2
18
FN
C
110-
FN
C
139
Fl
oati
ng Poi
nt
19
FN
C
140
-F
N
C
14
9
Da
ta
O
per
ati
on 2
20
FN
C
150-
FN
C
159
Posit
ioning
C
ontr
ol
Program examples
In programs, the contents of buffer memories (BFMs) in special extension units/blocks are read (transferred)
to data registers (D), extension registers (R) and auxiliary relays (M) with digit specification using the FROM
instruction and direct specification of buffer memories
*1
.
*1.
This function is supported only in FX
3U
/FX
3UC
PLCs.
Example: When the BFM #4 (abnormal station information) in the CC-Link/LT master unit (whose unit number
is fixed to "0") built in the FX
3UC
-32MT-LT(-2) is read to D0
- In case of FROM instruction
- In case of MOV instruction
Example: When the BFMs #0 to 3 (remote station connection information) in the CC-Link/LT master unit
(whose unit number is fixed to "0") built in the FX
3UC
-32MT-LT(-2) are read to D10 to D13
- In case of FROM instruction
- In case of BMOV instruction
M8000
Unit
No. 0
BFM #4
Transfer
destination
Number of
transfer
points
FNC 78
FROM
K0
K4
D0
K1
M0
Unit
No. 0
BFM #0
Transfer
destination
Number of
transfer
points
FNC 78
FROMP
K0
K0
D10
K4
M0
Unit
No. 0
BFM #0
Transfer
destination
Number of
transfer
points
FNC 78
FROMP
K0
K0
D10
K4
M0
Unit No. 0
BFM #0
Transfer
destination
FNC 15
BMOVP
U0\G0
D10
Number of
transfer
points
K4