Addition and Removal of Modbus Devices
Presentation
Modbus TCP/IP and Modbus-SL devices can be added to or removed from the EcoStruxure Panel Server system through the Panel Server webpages.
Discovery of Modbus TCP/IP Devices With a List
In the webpage, create
a list of devices to be discovered by entering the IP address for
each device. The port is always 502 (see Ethernet Communication) and unit
ID 255 (see Modbus Gateway Function).
Result: The table shows the following information for each device discovered on the Modbus TCP/IP network:
-
Picture
-
Device name
NOTE: If applicable, for example for a third-party device, unknown device is displayed. In this case, data not displayed in the webpages. -
IP address
-
Port
-
Virtual server ID
The device is displayed in the Modbus devices section.
Manual Addition of Modbus TCP/IP Devices
In the webpage, enter the following information for each device:
-
IP address
-
Port
-
Unit ID
-
Device type
NOTE: If the device type is not available in the drop-down list, for example for a third-party device, select unknown device. In this case, data is not displayed in the Panel Server webpages.
Result: Once the device is discovered, it is displayed in the Modbus devices section.
Discovery of Modbus-SL Devices With a List
In the webpage, enter the list of Modbus addresses (1–247) for which the devices must be discovered.
Result: The table shows the following information for each device discovered on the Modbus-SL network:
-
Picture
-
Device name
NOTE: If applicable, for example for a third-party device, unknown device is displayed. In this case, data is not displayed in the Panel Server webpages. -
Virtual server ID (Server ID)
The device is displayed in the Modbus devices section.
Manual Addition of Modbus-SL Devices
In the webpage, enter the physical server ID of the device to be added and select the device type.
Result: Once the device is discovered, it is displayed in the Modbus devices section.
Addition of Modbus-SL Devices Connected to a Child Panel Server Gateway
To add Modbus-SL devices connected to a child/downstream Panel Server (see example), navigate to .
Enter:
-
The IP address of the child/downstream Panel Server
-
The virtual server ID of the Modbus device in Unit ID
-
The Modbus device type
NOTE: If the device type is not available in the drop-down list, for example for a third-party device, select unknown device. In this case, data is not displayed in the Panel Server webpages.
Result: Once the device is discovered, it is displayed in the Modbus devices section.
Reading Modbus Device Registers
To troubleshoot the addition of Modbus devices, navigate to the webpage . Then follow this procedure:
-
Enter the Modbus-SL device ID.
-
Select the function code.
-
Enter the starting register number.
-
Click the Read registers button.
Result: A table is displayed containing the list of register numbers and the register content in hexadecimal format.
Removal of Modbus Devices
Follow this procedure to remove Modbus devices from the system:
-
Navigate to to view the list of connected devices.
-
Select the device to be removed from the system.
-
Click the bin icon on the top right side of the webpage.
-
Confirm removal process.
Result: Once the Modbus device is successfully disconnected from the Panel Server, it is no longer visible in the list of Modbus devices.