08.2012 Technology Option F01
Siemens AG 6SE7087-6QX70 (Version AN)
SIMOVERT MASTERDRIVES Compendium Motion Control 9-119
Special SIMOLINK properties in a master/slave configuration
Master interfaces are available for:
• SIMADYN D
• SIMATIC FM458
• SICOMP SMP
♦ The master can write data into a maximum of 1000 doubleword
messages. The slaves can read doubleword information from a
maximum of any 8 message locations.
♦ Cross-traffic, i.e. message exchange between slaves, is possible.
The traffic is always routed via the master, however.
Special SIMOLINK properties in a peer-to-peer configuration with
no host system
1
2 3
+ +
1 2 3 4 5 6 7 8
+ +
1 2 3 4 5 6 7 8
+ +
1 2 3 4 5 6 7 8
+ ++
2
1
3
Station 1
(Dispatcher) (Transceiver)
(Transceiver)
SYNC
Station 2
Station 3
Fig. 9-45
The SIMOLINK drive interface can be compared to a goods train that
passes through various stations on a circular route. The stations in this
example are represented by 3 MASTERDRIVES converters:
♦ A "data train" sent by a dispatcher travels along the SIMOLINK ring.
Otherwise, the dispatcher has the same function as the two
transceivers.
♦ A goods carriage with capacity for 8 double word messages (called
"channels") is permanently assigned to each station. The station can
only store send packets in this carriage.
♦ Each station can read up to 8 data packets from any goods carriage,
however.
♦ After one lap of the circuit, the dispatcher sends a SYNC message
"to all". All stations now start their sampling time at exactly the same
instant with related setpoints.
♦ The drives coordinate themselves without the need for a centralized
host system.
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