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The GMT-X1 supports multiple communication methods, including serial communication, CAN communication, Ethernet communication (Modbus TCP/IP), and fieldbus communication (including Profinet, EtherCAT, Ethernet/IP, and CC-Link IE Field Basic).

In this video, we will demonstrate how the GMT-X1 communicates with a Mitsubishi PLC via the CC-Link IE Field Basic bus.

Before communication, you need to download the GMT-X1 device description file “GMT-X1_CSP file” from the General Measure official website: www.gmweighing.com

The software used in this demonstration is GX Works3 (PC IP: 192.168.101.25).

The PLC model is FX5U (IP: 192.168.101.2), and the instrument GMT-X1 (IP: 192.168.101.10).

Make sure the PLC and the instrument are set to the same network segment in advance. After modifying the IP address of the instrument, it must be restarted for the changes to take effect.
The CSP file used is: 0x0352_GMT-X1_1_en.cspp.

1. Load the CSP File

Double-click to open the GX Works3 software. Then click [Tool] → [Profile Management] → [Register].
Select the previously downloaded CSP file, then click [Register] → [OK].

If this is your first time using the software, you need to disable [Security Enhancement Mode].
The steps are: click [View] → [Switch Security Enhancement Mode] → [Disable] → [OK], then close and reopen the software.

2. Create a New Project

Click [New], select the series FX5CPU, choose the model FX5U, and keep the default programming language as Ladder Diagram, click [OK].
Then click [OK] in the pop-up windows.

3. CPU Communication Test

Click [Online] → [Current Connection Destination] → [Direct Connection Settings] → [Ethernet].
Select the network adapter corresponding to the network card connected to the instrument, then click [Communication Test].
If the connection is successful, a message “Successfully connected to FX5U CPU” will appear.
Then click [OK] .

4. Network Configuration

In the navigation window, expand [Parameters] → [FX5UCPU] → [Module Parameters], then double-click [Ethernet Port].

In the Own Node Settings under [Basic Settings], click [IP Address Settings] and enter: (Based on your computer IP, subnet mask and default gateway)

• IP Address: 192.168.101.2
• Subnet Mask: 255.255.255.0
• Default Gateway: 192.168.101.1

For [CC-Link IEF Basic Usage], select [Enable] from the dropdown list.

Then double-click [Detailed Settings] under [Network Configuration Settings], click [Automatic Detection of Connected Devices] → [Yes].
Wait for the automatic detection to complete, then click [OK]. The network configuration will add the online GMT-X1 remote station in the local network along with its IP address.
Finally, click [Apply Settings and Close] → [Yes].

Next, double-click [Detailed Settings] under [Refresh Settings].
On the CPU side, set all [Refresh Targets] to Specified Device, and set the Device Names to X, Y, R, W respectively.
Set the Start Address to 100 for all of them.
Finally, click [Apply] to complete the network configuration.

5. Download the PLC Program

Click [Online] → [Write to PLC] → [Parameters + Program] → [Execute] → [Yes] → [Yes to All].
After the download is completed, click [Close] → [OK] → [Close].
Then reset the CPU or restart it. (Reset CPU to execute the RUN operation. Please reset the CPU or restart PLC.)

6. Read Cyclic Data

After resetting or restarting the CPU, click [View] → [Docking Window] → [Watch 1].
In the Watch 1 window, double-click the name field and enter the device name configured earlier, such as R100.
Double-click [Data Type], select Single-Precision Floating Point, and click [Start Monitoring].
The current weight will then be displayed (in floating-point format by default).

For reading and writing other data, please refer to the cyclic parameter address table in the instrument manual and the device mapping in the network configuration.

That's the end of this video. If you would like to learn more about the detailed functions of this instrument, feel free to contact General Measure.