System configuration and system status (web interface)
6.4 Powerline
Power Line Booster
Operating Instructions, 11/2019, A5E36203125A-AG
95
6.4
Powerline
6.4.1
Traffic Manager
Below you can change the system configuration. These parameters have already been
optimized for standard applications and must not be changed. Please note that the stability
of the system can be significantly reduced by just a minor change of the parameters.
6.4.1.1
Traffic Manager time configuration
Figure 6-14 Traffic Manager time configuration
Time settings
To ensure the real-time requirements, the PLB master polls all PLB slaves to which it is
connected in each cycle one after the other (polling) and waits for a response. When it is
finished with one cycle, it starts all over again.
If a known slave does not respond in a cycle (PLB slave is faulty or has dropped out of the
segment), the master waits for the time configured under "1st timeout" before it tries to
contact the next connected station. If it does not receive a response in the second cycle, it
only waits for the time defined under "2nd timeout". Because the likelihood that the station
has dropped out of the segment gets greater with each attempt, the timeout times are also
getting shorter. The time that is configured under "(>) 4th timeout" is applied until the
"Blacklist Timer" has expired. Once the blacklist timer has expired, it is assumed that the
station has dropped out of the segment and that the master will not poll it in future cycles.
The time of the "Blacklist Timer" must also be configured on the slave so that it knows
whether it is still potentially being polled by a master or whether is must respond to "Hello
frames" to log in again on a master. The value of the "Blacklist Timer" must always be the
same for all communication partners (master and slave).
Содержание SIMATIC Power Line Booster
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