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About NETLink S7-Compact
The NETLink S7-Compact is a gateway between a TCP network and an MPI, PPI, or PROFIBUS network.
Two protocols are available on the TCP side for the exchange of user data with the automation
system:
§
a proprietary protocol used to connect to the proprietary NETLink S7-Compact driver
§
the S7-TCP/IP protocol often NETLink S7-Compact used by visualization system manufacturers
which is known as RFC1006 or ISO-on-TCP.
Up to 16 TCP connections (10 Mbps or 100 Mbps) and up to 32 MPI/PPROFIBUS connections (9.6 Kbps
to 12 Mbps) can be used simultaneously.
The TCP/IP end of the NETLink S7-Compact is electrically isolated from the MPI/PPI/PROFIBUS.
On both the TCP and the fieldbus sides, the baud rate used can be determined automatically (auto
negotiation resp. auto baud).
Internet tele servicing with NETLink S7-Compact should only take place through additional encoding
mechanisms and the usual security criteria. The usual VPN technology (Virtual Private Network) is
suitable for this purpose. Further components are necessary to incorporate a NETLink S7-Compact
gateway into such a virtual tunnel.
The NETLink S7-Compact has the shape of a PROFIBUS connector with a PG female connector and it is
plugged directly into the MPI/PPI/PROFIBUS interface of the automation system. Because it is active,
no spur line is created that could interfere with the bus.
The TCP/IP end of the NETLink S7-Compact is electrically isolated from the MPI/PPI/PROFIBUS.
On both the TCP and the field bus sides, the baud rate used can be determined automatically (auto
negotiation or auto baud)
The NETLink S7-Compact can draw the necessary power supply either from the bus interface of the
programmable controller or via an external power supply.
The use of the NETLink S7-Compact driver makes it possible to use the NETLink S7-Compact as the
following at the PC end
§
programming adapter, or
§
operator control and monitoring unit
The RFC1006 interface also enables you to use third-party soft-ware that supports this protocol to
communicate with S7-200/S7-300 and S7-400 systems.
A NETLink S7-Compact can generally be connected to the PC via a switch, hub or directly via LAN
cable.
Version EN-062023-1.00
Note
The TCP/IP communication is not encoded to the extent that no direct IP Internet tele
servicing should take place via a NETLink S7-Compact gateway.
Chapter 2 - About NETLink S7-Compact
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