Plant planning
3.7 Data rate
Power Line Booster
46
Operating Instructions, 11/2019, A5E36203125A-AG
3.6.2
Registration and transfer times
Registration time is the time that a PLB slave that is ready for operation needs to set up a
connection to a master. This is the case, for example, when a vehicle in a PSS application
travels from a segment without communication to a segment with communication. The
values refer to the registration time of a slave into a segment with the maximum number of
slaves.
The maximum registration time is 4 seconds. 98% of registrations take less than 1 second.
In the special case that the maximum number of 40 slaves register simultaneously on a
master, the maximum time until all slaves have set up a connection is 15 seconds.
Transfer time is the time a slave with a communication connection needs to terminate the
existing connection and set up a connection to a new PLB master. This is the case, for
example, when a vehicle in a PDS application travels from one communication segment to
the next communication segment with the maximum number of slaves.
The maximum transfer time is 4 seconds. 98% of transfers take less than 2 seconds.
Time for 98% of registrations
Maximum time
Registration time of one slave
into a full segment
1 second
4 seconds
Transfer time of one slave to a
full segment
2 seconds
4 seconds
Registration time of 40 slaves
into a segment
12 seconds
15 seconds
Note
A short transfer time can only be guaranteed if a different Short Network ID (SNID) is
configured for neighboring masters.
The first identification of the powerline network is over the Short Network ID (SNID). To
implement a fast segment change, you must ensure that the SNID of the master changes as
well with each segment change. You can set the SNID in the Web user interface under
Segment configuration (Page 101).
3.7
Data rate
The maximum data rate that can be transmitted is distributed across all slaves in a segment.
If the connections are poor due to high contact resistances or unsuitable cables, for
example, the data rate can be negatively affected. Depending on your application and
needs, you can optimize the maximum data rate using the parameters of the Power Line
Booster Traffic Manager (Page 95).
Summary of Contents for SIMATIC Power Line Booster
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