Mitsubishi FX3U-232-BD User Manual page 545

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX
5.3 Direct Specification of Buffer Memory (U \G )
In FX and FX
3U 3UC
specified buffer memories even with instructions other than the FROM and TO.
1. How to specify a buffer memory directly
When directly specifying a buffer memory, put the following setting directly into the source or destination of
the command.
Specifies the block number
Example 1: When reading data from buffer memory No. 4 in special function block No. 1, and
transferring it to D0
In the case of FROM instruction
M8000
In the case of direct
specification
M8000
Example 2: When writing the numeric value K1 to buffer memory No. 1000 in special function block
No. 1 (pulse operation type)
In the case of TO instruction
M1
In the case of direct
specification
M1
Example 3: When multiplying the value stored in buffer memory No. 1000 in special function block
No. 1 by the numeric value "K2", and writing the multiplication result to buffer memories
Nos. 2000 and 2001 in special function block No. 2
When using the FROM and TO instructions
M0
In the case of direct specification
M0
Caution
The FX -32MT-LT PLC main unit has a built-in CC-Link/LT master. When using special function blocks, set
3UC
the block numbers. starting from "1".
-232IF)
2N
PLCs, one is able to directly specify buffer memories and read/write data from/to the
U \ G
FNC 78
K1 K4
FROM
FNC 12
MOV
FNC 79
K1 K1000
TO P
FNC 12
P
MOV
FNC 78
K1 K1000
FROM
FNC 22
D0
MUL
FNC 79
K2 K2000
TO
D
FNC 22
U1\G1000
MUL
5.3 Direct Specification of Buffer Memory (U \G )
Specifies the buffer memory number
D0 K1
U1\G4 D0
K1 K1
K1 U1\G1000
D0 K1
K2 D1
D1 K1
K2 U2\G2000
5 Creating Programs
A
B
C
D
E
F
G
H
I
Apx.
G-17