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.
