Installation and configuration of the LAN connection

One of the options for our DSP controlled power supplies is a LAN interface (option /LAN). The LAN interface in the power supply needs a partner driver on the connecting PC to establish a serial connection via LAN. The driver on the PC emulates a serial COM port for applications running on the PC allowing every application capable of serial communcation to connect to a properly setup power supply.

Every host connected to a LAN needs an IP address. The Lantronix COM Port Redirector (CPR Manager) is used to map the virtual COM port to an IP address. Ex works our power supplies are configured to get their IP address via DHCP.

  • If your network uses DHCP, there is no need to install and use Lantronix Device Installer and you can skip to the configuration of the COM port with Lantronix Com Port Redirector (CPR Manager).
  • If your network environment does not use DHCP, ask your network administration about how IP adresses are assigned in your environment and let them assign one including the correct subnet mask for the power supply. Never just make up an IP adress or subnet mask and assign it to the power supply. Using a wrong IP address or subnet mask could make the power supply unreachable and/or seriously interfere with the functional suitability of your network.

Installers

We use network modules from Lantronix  in our power supplies. Two installers from Lantronix are required to enable your PC to connect via the LAN interface to the power supply. Beforehand make sure your computer has the current version of Microsoft .NET Framework 4 installed, as both Lantronix applications require it.

  1. The Device Installer (DI) is used to assign IP and other network specific settings like a port number to the XPort module in your power supply.
    Download the  ZIP archive, unzip it and start the setup program.
  2. The COM Port Redirector (CPR) maps the TCP/IP connection to the XPort in your power supply configured with the device installer above onto a virtual COM port.
    Download the  ZIP archive, unzip it and start the setup program.

Download the needed installers and run them. You might need administrator privileges.

Configuration of the XPort with Lantronix Device Installer

Start Lantronix Device Installer.

Assign IP:

Lantronix Device Installer - Assing IP Adress

On the left choose the network you want to scan. If the XPort is not shown immediately, click on Search to scan the network for available XPorts.
If your computer has more than one LAN interface and is connected to more than one networks, you can choose the appropriate network interface under Tools → Options → Network.

Assignment Method:

Lantronix Device Installer - Assignment Method

Choose between automatic or manual assignment.

IP Settings:

Lantronix Device Installer - IP Settings

IP address, subnetz mask and gateway.

Assignment:

Lantronix Device Installer - Assignment - Assign

Click on Assign to activate the settings.

Assignment:

Lantronix Device Installer - Assignment - Assignmentcompeted successfully

The settings have been sent to the XPort.

Device Installer:

Lantronix Device Installer - XPort has new IP address

The XPort is recognized with its new IP address.

Configuration of the virtual COM port with Lantronix Com Port Redirector (CPR Manager)

COM Port List before search:

CPR Manager - Com Port List before search

After starting up without any configured virtual interface the CPR Manager lists all physical COM ports of the computer.

Com Port List after search:

CPR Manager - Com Port List after search

Click Refresh to scan for XPorts the CPR can find in the LAN. Found XPorts will be displayed in the Device List in the lower part of the window.

After a click on Add/Remove

Com Ports:

CPR Manager - Com Ports

…you can choose a COM port name to map this connection to. Already assigned port names are grayed out. Here COM 100 is chosen.

Com Port List with new entry:

CPR Manager - Com Port List with new entry

The new COM port is listed, but is not mapped to the IP address yet.

Empty settings for the new port:

CPR Manager - Empty settings for the new port

Click on the chosen COM port in the list at the left. The current settings of this port are displayed and can be edited.

Added settings for the new port:

CPR Manager - Added settings for the new port

The data of the XPort can either be filled out manually or by doing a right-click on the XPort in the Device List at the bottom and choosing Add To Settings.

Com Port List with new port added:

CPR Manager - Com Port List with new port added

Now the COM Port 100 is mapped to the IP address of the XPort.

The new COM port has the default settings a physical interface would have. A few settings need to be changed.

Settings in the Device Manager

Ports (COM & LPT):

Device Manager - Ports (COM & LPT)

Open the Device Manager in the Control Panel of your computer and toggle the entry for Ports (COM & LPT) open. The new COM port is shown as Lantronix CPR Port with the number you assigned earlier.

Lantronix CPR Port properties - general:

Device Manager - new port properties: general

Doing a right-click on the new COM port and choosing Properties will bring up a new window.

Lantronix CPR Port properties - settings:

Device Manager - new port properties: port settings

Open the tab Port Settings. The settings shown should correspond to the data you entered when you configured the XPort with the CPR Manager.

Now choose Advanced

Advanced Settings default:

Device Manager - Advanced Settings default

These are the default settings

Advanced Settings custom:

Device Manager - Advanced Settings custom

Change the settings for Receive Buffer and Transmit Buffer to the lowest possible values and save the settings by clicking on OK.

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