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Joe B

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  1. I have an OEM customer whose machines are installed globally. They are currently using a V130 to control their machines. They want to be able to monitor/troubleshoot the program, load new data into datatables, change settings in the program, etc. all remotely via a GSM modem. Problem is, they do not want to pay for 200+ per year public IP addresses. In theory, if they had private static IP addresses in GSM modems connected to their machines, and then used a VPN connection to their SIM provider to "tunnel" to these addresses, they should be able to accomplish this, right? I had one of their machines set up with an Enfora modem and a SIM card with a private static IP address. The provider then provided us with a VPN connection that was supposed to link us to this address. The modem initialized, I got network registration, everything looked good. However, after connecting to the VPN, I could not connect to the PLC. I tried pinging the private static IP address of the SIM card (while still connected to the VPN connection) and could not get a reply. I still have not got this setup to work. Is anyone else trying to do something like this? It seems like there would be a huge market for this - companies with machines in several locations or machines that are mobile, that the company would like to monitor. Public static IP addresses are not cheap. We were having trouble finding a provider who would supply us one - much less 200 per year.
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