22 NETLink
®
Ethernet Products
S7-NET driver in various automation systems, possibly with dif-
ferent transmission speeds.
This auto-baud function is only supported when the 'Cyclical dis-
tribution of the bus parameters' is activated in the involved automa-
tion system. This function is not available in S7-200 systems in
general.
5.1.1 MPI
The MPI configuration contains station and network-related set-
tings.
The most important setting concerning bus configuration is as-
signment of the station address. This refers to the address the
NETLink
®
will have on the bus when it goes online.
The station address can have any value from ‘0’ and ‘126’ if the
selected address is lower than or equal to the highest station ad-
dress (HSA).
Example: HSA = 31
Any value between ‘0’ and ‘31’ can be specified for the station ad-
dress if this address does not yet exist on the bus.
The local timeout of the NETLink-S7-NET driver can be param-
eterized in the station-related settings. If the driver does not re-
ceive a response to a request within the set timeout, a communi-
cation error is signaled to the Simatic application.
The network settings can be adapted manually if the checkmark
next to “Automatic Baud Rate Detection” is removed. This is usually
only necessary if the NETLink
®
fails to sign onto the bus system
automatically (can happen with passive bus participant).
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