Mitsubishi FX3U User Manual

6 Introduction of Functions
6.2 Basic Functions
48
FX3U-16CCL-M User's Manual
6.2.3 Communication between master station and intelligent device stations
This subsection describes the overview of the communication between the master station and intelligent
device stations.
Data link startup
1) The PLC sets to ON the write refresh command (BFM#10 b0), and makes the data of the remote output
(RY) effective.
When the write refresh command (BFM#10 b0) is OFF, all data of the remote output (RY) is treated as "0
(OFF)".
2) The PLC sets to ON the write data link startup by buffer memory parameters (BFM#10 b6) to start the
data link.
When the data link starts normally, the read data link status in master station (BFM#10 b1) turns ON.
PLC Master station
Refresh command
Intelligent device station
SET
FROM
TO
BFM#10 b0
SET
Buffer memory
Remote input (RX)
Remote output (RY)
BFM#10 b6
Remote input
(RX)
Link scan
Link scan
2)
4)
5)
3)
6)
TO
FROM
Remote register
(RWw)
Remote register
(RWr)
7)
10)
8)
9)
Remote output
(RY)
Remote register
(RWw)
Remote register
(RWr)
Link scan
Link scan
1)
Data link startup
M
M

Mitsubishi FX3U Specifications

General

Series	FX3U
Program Capacity	64k steps
Type	PLC
Power Supply	AC: 100-240V, DC: 24V
I/O Points	Up to 384 points
Communication	RS-232C, USB, Ethernet
Expansion	Supports multiple expansion modules including I/O, analog, and communication modules
Programming Language	Ladder Logic, SFC, Function Block Diagram
High-speed Processing	0.065 μs per basic instruction
Analog I/O	Available with expansion modules
Positioning Control	Up to 3 axes of positioning control
Weight	0.3 kg (Main unit)