Manual > Device Connection Guide > MG > Connection Procedure (Ethernet) > ModbusTCP/R3/R5/R7E/R9E/D3/D5/GR8/IB10/WL40/IT

About the connection example

Please see below for an example of connection settings for this driver.

Applicable models etc.

explanation

This is an example of connection settings with the R3 series via Modbus/TCP.

This is an example of connection settings with the WL40/IT series via Modbus/TCP.

*For connection methods for models not included above, please refer to the settings in "Connection example [R3 series]".

Device List

The compatible devices are as follows (see here for how to view the device list).

device	keyword	Start address	explanation	unit	reading	Writing
Coil (0x)	C	00001	Decimal	bit	○	○
Input Status (1x)	I	10001	Decimal	bit	○	×
Input Registers (3x)	IR	30001	Decimal	word	○	×
Input register (for 3x floating point)	IRF	30257	Decimal	word	○	×
Holding Registers (4x)	HR	40001	Decimal	word	○	●
Holding registers (for 4x floats)	HRF	40257	Decimal	word	○	●

Communication with R3-NE1 is carried out using the Modbus/TCP protocol.

Depending on the IO card configuration, the I/O devices are mapped to the addresses in the table above. For R3-NE1, they are assigned as follows:

For details, please refer to the MG manual "Remote I/O Converter R3 Series Modbus/TCP (Ethernet) Communications Card R3-NE1."

	Address	Data Type	Data
coil Coil 0x	1 to 1024	bit	Contact Output
Input Status Input 1X	1 to 1024	bit	Contact Input
	1025 to 1040	bit	Card Information
	1041 to 1056	bit	Anomaly Information
	1057 to 1072	bit	Data anomaly information
Input Register Input Register 3X	1-256	Integer(IR) *	Analog Input
Input Register Input Register 3X	257～768	Floating point number (IRF) *	Analog Input
Holding Register Holding Register 4X	1-256	Integer(HR) *	Analog Output
Holding Register Holding Register 4X	257～768	Floating point number (HRF) *	Analog Output

*Please use IR/HR for integer ranges 30001 to 30256 or 40001 to 40256. Please use IRF/HRF for single-precision floating-point ranges (IEEE 32bit) 30257 and above or 40257 and above.

*For R5-NE1, if you use the floating-point area of the input register or holding register, select IR or HR without using IRF or HRF, set "Type" to single-precision floating-point type, and set "Size" to 32 bits. The same applies when communicating with R1M series via D5-NE1 or 72EM2.

Number of digits in address

This driver allows you to specify 5 or 6 digits in the Modbus/TCP address settings. The driver you select depends on the number of digits, so please select the driver that matches your specifications.

About the setting software and manual

Configuration software (such as "R3CON" or "ITCFG") and manuals (such as "Remote I/O Converter R3 Series Modbus/TCP (Ethernet) Communications Card R3-NE1") can be downloaded from the following site.

http://www.m-system.co.jp/

Notes

Retry settings when setting an update cycle longer than the timespan

Depending on the device specifications, there is a mechanism to close the connection if no TCP/IP communication is performed for a certain period of time. Therefore, if you set an update cycle longer than the time span of that period, a communication error will occur.

Reference: The default value for R3-NE1 is 180 seconds. The configurable range is 0 to 3276.7 seconds.

*For information on how to set up and specify the settings, please refer to the device's manual.

If you need to specify an update cycle longer than this time span, specify a retry count of 1 or more in the unit's communication settings. This setting will cause the first communication to fail internally, but the retry will result in a connection being reopened, so no communication errors will occur.

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Node number when using GR8-EM

When using GR8-EM, set the node number of the remote I/O to be connected in the connection test dialog and folder network settings.

[Connection test dialog]

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[Folder Properties]

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