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Normally, to access the modbus device on the local network, it needed a VPN connection. So how, if we do not have a VPN Server, but we want to connect with this device directly from the Internet?
To answer this question, use the Windows PC that can be connected to the internet, and this Windows PC also can be connected to the local network. After that, run the Modbus Master Slave Server application that you can download in here https://dl.dropboxusercontent.com/u/3351822/HINETSlaveServer2016.rar
after that, create a new Modbus port as shown in the following picture: https://dl.dropboxusercontent.com/u/3351822/ModbusGateWayPic.jpg
After click create button, now you double click field 'status port' on the grid to run this service.
And now your Modbus devices it can be accessed via Modbus Master Application from the Internet, via accessing to the IP public used by this windows PC.
Good luck..
To answer this question, use the Windows PC that can be connected to the internet, and this Windows PC also can be connected to the local network. After that, run the Modbus Master Slave Server application that you can download in here https://dl.dropboxusercontent.com/u/3351822/HINETSlaveServer2016.rar
after that, create a new Modbus port as shown in the following picture: https://dl.dropboxusercontent.com/u/3351822/ModbusGateWayPic.jpg
After click create button, now you double click field 'status port' on the grid to run this service.
And now your Modbus devices it can be accessed via Modbus Master Application from the Internet, via accessing to the IP public used by this windows PC.
Good luck..