Mitsubishi Electronics FX3G User Manual
450
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
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
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
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
M8000
Unit No. 0
BFM#4
Transfer
destination
FNC 12
MOV
U0\G4
D0
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