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Free remote maintenance for your ACE PLC and CommandHMI

via Android smartphone in 4G or WiFi


Now, all machine builder recognizes the need to remotely access its machines in order to reduce maintenance costs and optimize customers machine uptime. Our solution is free and use almost common hardware for its realization. It’s simple, reliable and easy to use…

However, you must know that you can also share and upload a program without disclosure the code

WIFI/4G remote access using an Android Smartphone. It’s almost free, just need some hardware device for connected Android Smartphone to the ACE PLC or CommandHMI


On the PC remote maintenance side : Service Engineer / Machine Builder

On the PC you want to use for remote maintenance, close vBuilder, and download this software:

Start the program VirtualHere USB Client. Right click USB Hubs > Specify Hubs > Advanced Tab and check “Enable Reverse Connections”

In your ADSL router, the one you use for your internet access at the office, forward the port 7573 from Internet to your PC. In some case you must restart your router.

Note your Public addresse IP (see You will need it for the ACE PLC / CommandHMI side.

It’s done! That’s all! We just have to wait the connection from the ACE PLC or CommandHMIs side

Here, we are connected to the USB port of the Android Smartphone, but not to the ACE PLC or CommandHMI.
Double-click on the “Virtual COM Port” to be connected to the ACE PLC or CommandHMI
Or you can select Auto-Use All Devices for be connected automatically on each USB port.

Then launch vBuilder and you can work as you were directly connected to your ACE PLC!

    • Now, you can troubleshoot, debug and program ACE PLCs remotely and almost live
    • You can switch to other applications on your smartphone, it will always work

On the ACE PLCs and CommandHMIs side : Remote customer

You need:




Android Phone
with Micro-USB or USB-C port


or USB-C OTG Adapter


USB to Mini USB cable
for the ACE PLC
or USB to USB A cable

for the CommandHMI




Your Incredible ACE PLC


your Affordable CommandHMI


On your Smartphone, install the VirtualHere USB Server application available on Google Play for Android

Start the program

In the menu, select “Reverse Clients”. Add a new Reverse Client and Enter “client hostname”or IP address

  • This IP address is the Public IP addess of the Internet access (ADSL) on the remote maintenance PC side
  • Generally, you must ask this IP address to the machine builder
  • Let the port number by defaut (7573). So you must have something like XXX.XXX.XXX.XXX:7573 where XXX.XXX.XXX.XXX is the Internet ADSL IP address

It’s done! That’s all! We just have to wait the connection of the engineer service / machine builder. (Remote maintenance PC side)!