Mitsubishi FX3UC Series User Manual

307
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
9 CC-Link/LT Built-in master ability (Only FX3UC-32MT-LT)
9.17 Buffer Memory
1
Outline
2
External Dimensions
3
Generic Specifications
4
Power Supply Specifications
5
Input Specifications
6
Output Specifications
7
Examples of Wiring for Various Uses
8
Terminal Block
9
CC-Link/LT Master FX
3UC
(LT only)
10
Display module FX
3UC
(LT only)
9.17 Buffer Memory
Data transfer between the PLC main unit and built-in master is executed by a program in the PLC.
9.17.1 Used instruction
1. "Built-in master → CPU" (Data read)
Read (transfer) the contents saved in the buffer memory (BFM) in the built-in master to a data register (D),
extension register (R) or auxiliary relay (M) for digit specification, etc. using an application instruction such as
FROM, MOV or BMOV instruction.
Example) Program to read the contents of the BFM #4 (abnormal station information) in the built-in master
(whose unit No. is fixed to 0) to D0
1) FROM instruction
2) Direct Specification of Buffer Memory (U[ ]\G[ ])
In case of the MOV instruction
Example) Program to read the contents of the BFM #0 to #3 (remote station connection information) in the
built-in master (whose unit No. is fixed to 0) to D10 to D13
1) FROM instruction
2) Direct Specification of Buffer Memory (U[ ]\G[ ])
In case of the BMOV instruction
2. "CPU → Built-in master" (Data write)
Write (transfer) the contents of a data register (D), extension register (R) or auxiliary relay (M) for digit
specification, constant (K or H), etc. to the buffer memory (BFM) in the built-in master using an application
instruction such as TO, MOV or BMOV instruction.
Example) Program to write "H0" to the BFM #27 (command) in the built-in master (whose unit No. is fixed to 0)
1) TO instruction
2) Direct Specification of Buffer Memory (U[ ]\G[ ])
In case of the MOV instruction
K4 D0 K1
M8000
FROM K0
Unit
No. 0
BFM
#4
Storage
destination
Number of
transfer points
D0
M8000
MOV U0\G4
Unit No. 0
BFM #4
Storage
destination
K0 D10 K4
M0
FROMP K0
Unit
No. 0
BFM
#0
Storage
destination
Number of
transfer points
D10
M0
BMOVP U0\G0
Unit No. 0
BFM #0
K4
Storage
destination
Number of
transfer points
K27 H0 K1
M1
TOP K0
Unit
No. 0
BFM
#27
Transfer
source
data
Number of
transfer points
U0\G27
M1
MOVP H0
Transfer
source
data
Unit No. 0
BFM #27

Mitsubishi FX3UC Series Specifications

General

Brand	Mitsubishi
Model	FX3UC Series
Category	Controller
Language	English