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4/2/2009 10:50 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (308) |
Hello, An MD741 is connected to Intrenet (via GPRS or EDGE). The most common way to connect without a TIM is to create a VPN tunnel between the MD741 and an Scalance S612. The PN-CPU is connected behind the S612. The usage of a VPN tunnel is recommended because your traffic crosses the Internet. And a VPN tunnel will assure functions like authentication, encryption, ... that will protect your traffic. This is described here: http://support.automation.siemens.com/WW/view/en/24960449 A TIM can be used additionally when connecting to a SIAUT Server. One of the functions of a TIM is to buffer data if the link is not available for a while. More info here: http://support.automation.siemens.com/WW/view/en/23810112 PS: the MD740-1 is replaced by MD741-1 |
Best regards |
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6/8/2009 11:44 AM | |
Posts: 5 Rating: (0) |
to answer the other question, the MD741-1 cna not be conected to the PN connection of the CPU. hope this helps. |