Mervis on Unipi Axon

By default, each Axon controller comes with a pre-uploaded Mervis OS image. To use the Mervis, all you need to do is to install the Mervis IDE.

Axon

Flashing OS via the service interface on Axon controllers can be performed in three ways:

1) In a local network (with DHCP):

  1. Connect the PLC to your local network, plug in the power supply and wait at least for a minute before the PLC boots and gets an IP address from DHCP. After that unplug the power supply
  2. Press and hold the Reset button located in the upper row of connector labels (left from USB port labels)
  3. Plug in the power supply. After few moments the controller will switch to the service mode indicated by alternating blinking of the upper and lower row of LEDs. You can release the Reset button.
  4. You now need to get the PLC's IP address. You can obtain it either from the DHCP server or using a suitable application such as Advanced IP Scanneruser manual

2) Direct connection to the PLC (without DHCP):

  1. Connect to the PLC using a network cable (RJ45)
  2. Press and hold the Reset button located in the upper row of connector labels (left from USB port labels)
  3. Plug in the power supply. After few moments the controller will switch to the service mode indicated by alternating blinking of the upper and lower row of LEDs. You can release the Reset button.
  4. Set the PC's IP address to 192.168.200.100, mask 255.255.255.0
  5. The Axon's IP is now set to 192.168.200.200

3) Via a Wi-Fi hotspot

  1. Press and hold the Reset button located in the upper row of connector labels (left from USB port labels)
  2. Plug in the power supply. After few moments the controller will switch to the service mode indicated by alternating blinking of the upper and lower row of LEDs. You can release the Reset button.
  3. Connect to Wi-Fi network with SSID: UNIPICONFIG, using unipi.technology as password. Wait until your PLC obtains an IP address from the DHCP server running in the PLC
  4. The Axon's IP is now set to 192.168.201.1

Next steps:

  1. Enter the PLC's IP address into your web browser. After confirmation, the Axon service interface will display
  2. Drag and drop the archive.swu file obtained from the OS image archive into the Software update dialogue window
  3. Wait until the controller finishes the entire process. You can monitor its progress in the Messages dialogue window
  4. The controller will automatically reboot

Flashing the OS using USB flash disk

  1. Prepare a USB flash disk with a capacity of at least 2 GB and a FAT32 partition
  2. Copy the whole content of the ZIP archive to the flash disk
  3. Insert the flash disk into the controller's USB2 port
  4. Press and hold the reset button located next to the upper row of connector labels
  5. The controller will automatically start the reflashing process, indicated by progressive blinking of LEDs. You can now release the reset button
  6. Once the LEDs stop blinking the reflash is completed. After that, the Axon will automatically reboot to its normal state

Only the USB2 port can be used for reflashing.

In case the used flash disk is not compatible, Axon will boot to the Service mode and the progressive blinking of LEDs is not indicated. In this case it necessary to use different flash disk or the above mentioned Service web interface.

Download the latest version of Mervis from our download section and run the installation package.

The installation process displays the welcome screen, which you can confirm by clicking on Next.

In next dialog, you have to confirm the License agreement and click on Next

In next dialog, we can select parts of Mervis for installation. The IDE is the editor, in which we will create and debug programs for UniPi controller. The Windows RT is a simulator of a controller, if you don't have one. Typically, you will need only the IDE.

In older Mervis version, there was also option for installing HMI editor. In current version, the HMI editor has been merged into IDE.

Last two dialogs are just for confirmation of the installation process and finishing it. Just hit Install and then Finish.