Schneider

Version 5.1 by Hunter on 2025/12/06 18:52

Schneider Modicon MODBUS RTU

HMI Setting

PLC Setting

Communication mode	Modbus RTU protocol

Device Address

Bit/Word	Device type	Format	Range	Memo
B	IX	DDDDDo	0 ~ 655357	Input bit (read only)
B	QX	DDDDDo	0 ~ 655357	Write multiple coils
B	MX	DDDDDDo	0 ~ 9999997	Output register bit (octal)
W	MW	DDDDDD	0 ~ 999999	Output register
DW	MD	DDDDDD	0 ~ 999999	Output register

Wiring Diagram

RS-485 2W (RJ45 Connector): The following is the view from the soldering point of a connector.

HMI Setting

Parameters	Recommended	Notes
Protocol	Schneider Modicon MODBUS RTU
Connection	RS485
Baud rate	19200
Data bit	8
Parity	Even
Stop bit	1
PLC station No.	1

Device Address

Bit/Word	Device type	Format	Range
B	IX	IX dddd.d	0 to 65535
B	QX	QX dddd.d	0 to 65535
B	MX	MX dddd.dd	0 to 999999
W	MW	MW dddd	0 to 999999

Configure the communication protocol

PLC Setting:

Open SoMachine Central, create a new project or open the project that has been created.

Create new project: [Create a new project]→[Empty Project]→[OK]→[Open Configuration]

Into the [Open Configuration].

[Untitled]→[Add Device]→[Logic Controller]→[M218]→[TM218LDA16DRN]

PLC Default Parameters:

In the Devices tree [MyController]→[Serial Line 2]→[Modbus_Manager]

Modbus:

[Transmission Mode] RTU→[Addressing] Slave

Serial Line Settings:

[Baud rate] 19200, [Data bits] 8, [Stop bits] 1, [Parity] EVEN, [Physical Medium] RS485

Cable Wiring

Supported Series: Modicon M221 Series

HMI Setting

Address List

Type	Address Type	Format	Range	Note
Bit	IWMB	IWMB DD.dd	0~20.15	Output Register(Bit type)
	QWMB	QWMB DD.dd	0~20.15	Input Register(Bit type)
	MWB	MWB DDDD.dd	0~8000.15	Internal memory word(Bit type)
	M	M DDDD	0~1024	Internal memory bit
	IWB	IWB DDDDDD.dd	0~255255.15	Analog Input(Bit type)
	I	I DDD.dd	0~255.13	Digital Input
	Q	Q DDD.d	0~255.9	Digital Output
	S	S DDD	0~159	System Bit
Word	IWM	IWM DD	0~20	Output Register
	QWM	QWM DD	0~20	Input Register
	MW	MW DDDD	0~7999	Internal memory word
	MD	MD DDDD	0~7998	Internal memory double word
	MF	MF DDDD	0~7998	Internal memory floating point
	IW	IW DDDDDD	0~255255	Analog Input
	SW	SW DDD	0~233	System word
	KW	KW DDD	0~511	Constant word
	KD	KD DDD	0~510	Internal constant double word
	KF	KF DDD	0~510	Internal constant floating point
	TM_V	TM_V DDD	0~254	Timer
	TM_P	TM_P DDD	0~254	Timer