Manual > Device Connection Guide > Modicon > Connection Procedure (Ethernet) > Modbus/TCP > Connection Example [Yokogawa Electric GM10]

overview

This is a connection example with Yokogawa Electric's GM10. This is a setting example for an Ethernet connection using Modbus/TCP.

Model used

item	Model etc.
device	GM10
Communication Unit	Ports included with the unit

Configuration environment

item

environment

Windows10 Pro 64Bit

tool

IP Address Setting Tool

Web browser (Microsoft Edge, etc.)

Configuration details

item	setting	Setting items	Configuration Example
Device settings	Set with tools	IP address	192.168.1.1
		Subnet mask	255.255.255.0
		Port number	502
PC settings	Unit Settings	IP address	192.168.0.1
		Port number	Automatic
		Communication Protocol	TCP (UDP cannot be specified)
	Folder Settings	Unit ID	255

* Most of the settings on the computer will be adjusted to match the settings on the unit.

Device settings

Configure the "GM10". The settings are done using an IP address setting tool and a web browser such as Microsoft Edge.

1.Start the IP address setting tool and click "Search".

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If multiple network adapters are connected, the device cannot be found.

In such cases, you will need to disable all adapters other than the one connected to the device using the following method.

- Remove everything except the network adapter connected to the device.

- Disable all network adapters in the OS settings except for the one connected to the device, etc.

2.Select the target device, click "Network Settings" and set as follows

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setting	Setting contents
IP address	192.168.1.1
Subnet mask	255.255.255.0

3.Click "Change" and exit the tool

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The IP address cannot be changed if the GM (firmware version R2.03.01 or later) is in the following state: If changing the IP address fails, the message "Address setting failed" is displayed.

-The security function setting is set to Communication [Login].

- The advanced security function (additional specification, /AS) is set to [On] and recording is in progress.

4.Access the IP address of the target device from a WEB browser

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5.Open "Settings" tab - "Communication (Ethernet) Settings" - "Server Settings Server List"

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6.Set MODBUS as follows and click "Change"

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setting	Setting contents
On/Off	Select "On"
Port number	502

PC settings

Use the Server application to connect to the device for which you have set up communications.

1.Right-click "Application" - "Driver" in the tree and select Add Driver.

2.Select the following units from the displayed driver list and add them:
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3.Open the properties of the added unit (U01) and click Communication Settings.
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4.Configure the following in "PC Settings"

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setting	Setting contents
Computer IP address	192.168.1.2
Computer port number	(Automatic)

5.Set the following in "Unit side settings"

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setting	Setting contents
Unit IP Address	192.168.1.1
Unit Port Number	502

6.Select "Ping Test" to check if the ping goes through normally.

If you see a message such as "Ping test is success～", the test was successful.

7.Specify "255" for "Start" and "End" in the network settings, perform a connection test, and confirm the connection.

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If a message such as "Connection OK" is displayed, the connection is confirmed.

The GM10 Unit ID is fixed at "255", so specify "255" as the parameter.

Folder settings

The GM10 Unit ID is fixed at "255", so specify "255" in the communication settings for the folder you want to add under the unit.

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Update cycle

We have confirmed that if the update cycle is set to longer than a certain period of time (30 seconds or more), TCP/IP communication is disconnected from the device.

Therefore, make sure to specify an update interval shorter than 30 seconds.

Please note that this behavior depends on the device specifications and may change in the future. Please contact Yokogawa Electric for details.

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Mapping and tagging

The mapping on the GM10 side during Modbus/TCP communication is as follows:

The contents on this page are excerpts from the GM manual.

For details, please refer to the device manual.

coil

kinds		number	Type
Input/Output Channels	Input data	00001 to 00500	Bit
	Status Information	00501 to 01000
Communication Channels	Calculation Data	01001 to 01500
	Status Information	01501 to 02000
Internal Switch		02001 to 02100

The writable areas of the coil are as follows:

- Communication channel communication data (01001 to 01500)

- Internal switches (02001 to 02100) *The type of switch must be specified in the manual

If you write to any other area, a communication error will occur.

Input relay (input status)

kinds		number	Type
Input/Output Channels	Input data	100001 to 100500	Bit
	Status Information	100501 to 101000
Communication Channels	Calculation Data	101001 to 101200
	Status Information	101501 to 101700

Input Register

unit	kinds		number	Type
Main Unit	Input/Output Channels	Input/Output Data	300001 to 301000	Signed 32-bit integer type
			301001 to 302000	32-bit floating-point type
			302001 to 302500	Signed 16-bit integer type
		Status Information	302501 to 303000	Signed 16-bit integer type
	Input/Output Channels	Input/Output Data	304201 to 304400	Signed 32-bit integer type
	(Continuous area)		304401 to 304500	32-bit floating-point type
		Status Information	304501 to 304600	Signed 16-bit integer type
	Calculation Channel	Calculation Data	305001 to 305200	Signed 32-bit integer type
	(A001 to A100)		305201 to 305400	32-bit floating-point type
			305401 to 305500	Signed 16-bit integer type
		Status Information	305501 to 305600	Signed 16-bit integer type
	Calculation Channel	Calculation Data	306001 to 306200	Signed 32-bit integer type
	(A101 to A200)		306201 to 306400	32-bit floating-point type
			306401 to 306500	Signed 16-bit integer type
		Status Information	306501 to 306600	Signed 16-bit integer type
	Device Status		308001 to 308007	Signed 16-bit integer type
Subunits	Unit 1	Input/Output Data	310001 to 311000	Signed 32-bit integer type
	Input/Output Channels		311001 to 312000	32-bit floating-point type
			312001 to 312500	Signed 16-bit integer type
		Status Information	312501 to 313000	Signed 16-bit integer type
	Unit 2	Input/Output Data	315001 to 316000	Signed 32-bit integer type
	Input/Output Channels		316001 to 317000	32-bit floating-point type
			317001 to 317500	Signed 16-bit integer type
		Status Information	317501 to 318000	Signed 16-bit integer type
	Unit 3	Input/Output Data	320001 to 321000	Signed 32-bit integer type
	Input/Output Channels		321001 to 322000	32-bit floating-point type
			322001 to 322500	Signed 16-bit integer type
		Status Information	322501 to 323500	Signed 16-bit integer type
	Unit 4	Input/Output Data	325001 to 326000	Signed 32-bit integer type
	Input/Output Channels		326001 to 327000	32-bit floating-point type
			327001 to 327500	Signed 16-bit integer type
		Status Information	327501 to 328000	Signed 16-bit integer type
	Unit 5	Input/Output Data	330001 to 331000	Signed 32-bit integer type
	Input/Output Channels		331001 to 332000	32-bit floating-point type
			332001 to 332500	Signed 16-bit integer type
		Status Information	332500 to 333000	Signed 16-bit integer type
	Unit 6	Input/Output Data	335001 to 336000	Signed 32-bit integer type
	Input/Output Channels		336001 to 337000	32-bit floating-point type
			337001 to 337500	Signed 16-bit integer type
		Status Information	337501 to 338000	Signed 16-bit integer type

Holding Register

unit	kinds		number	Type
Main Unit	Input/Output Channels	Input/Output Data	400001 to 401000	Signed 32-bit integer type
			401001 to 402000	32-bit floating-point type
			402001 to 402500	Signed 16-bit integer type
		Status Information	402501 to 403000	Signed 16-bit integer type
	Input/Output Channels	Input/Output Data	404001 to 404200	Signed 32-bit integer type
	(Continuous area)		404201 to 404400	32-bit floating-point type
			404401 to 404500	Signed 16-bit integer type
		Status Information	404501 to 404600	Signed 16-bit integer type
	Communication Channels	Communication Data	405001 to 406000	Signed 32-bit integer type
			406001 to 407000	32-bit floating-point type
			407001 to 407500	Signed 16-bit integer type
		Status Information	407501 to 408000	Signed 16-bit integer type
	Internal Switch		408001 to 408100	Signed 16-bit integer type
	Main unit operation settings		409001 to 410000	Signed 16-bit integer type
Subunits	Unit 1	Input/Output Data	410001 to 411000	Signed 32-bit integer type
	Input/Output Channels		411001 to 412000	32-bit floating-point type
			412001 to 412500	Signed 16-bit integer type
		Status Information	412501 to 413000	Signed 16-bit integer type
	Unit 2	Input/Output Data	415001 to 416000	Signed 32-bit integer type
	Input/Output Channels		416001 to 417000	32-bit floating-point type
			417001 to 417500	Signed 16-bit integer type
		Status Information	417501 to 418000	Signed 16-bit integer type
	Unit 3	Input/Output Data	420001 to 421000	Signed 32-bit integer type
	Input/Output Channels		421001 to 422000	32-bit floating-point type
			422001 to 422500	Signed 16-bit integer type
		Status Information	422501 to 423000	Signed 16-bit integer type
	Unit 4	Input/Output Data	425001 to 426000	Signed 32-bit integer type
	Input/Output Channels		426001 to 427000	32-bit floating-point type
			427001 to 427500	Signed 16-bit integer type
		Status Information	427501 to 428000	Signed 16-bit integer type
	Unit 5	Input/Output Data	430001 to 431000	Signed 32-bit integer type
	Input/Output Channels		431001 to 432000	32-bit floating-point type
			432001 to 432500	Signed 16-bit integer type
		Status Information	432501 to 433000	Signed 16-bit integer type
	Unit 6	Input/Output Data	435001 to 436000	Signed 32-bit integer type
	Input/Output Channels		436001 to 437000	32-bit floating-point type
			437001 to 437500	Signed 16-bit integer type
		Input/Output Data	437501 to 438000	Signed 16-bit integer type
Channel Properties	Each channel information	Channel Properties	440001 to 465000	Signed 16-bit integer type

The writable areas of the holding register are as follows:

- Communication channel communication data (405001 to 407500)

- Internal switches (408001 to 408100) *The type of switch must be specified in the manual

If you write to any other area, a communication error will occur.

Please set the tags according to the format specified on the GM side.

Example: When referencing holding register 405001 (signed 32-bit integer type)

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Example: When referencing holding register 406001 (32-bit floating-point type)

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Example: When referencing holding register 407001 (signed 16-bit integer type)

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Connection example [Yokogawa Electric GM10]

Connection example [Yokogawa Electric GM10]