MD720-3 GSM modem & S7-200 PLC

[Raj Kumar 0]

I am trying to transfer data between CPU226 & CPU 224XP by using GSM Modem MD720-3 at both ends. I do not want any computer or LAN etc in between. Has some body done it? I need help in this......

[sse 0]

I've had an experience with non-SIEMENS EDGE modems ER-75i, connected to S7-200 and S7-300 PLCs. A PC with VPN client software was on other side. If static IP is obtainable, a modem-to-modem VPN tunnel must work without a problem