Siemens Simovert Masterdrives Compendium page 476

12.2010
8.3.2 Peer-to-peer functionality
Bus topology
Dispatcher
NOTE
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
Each node on SIMOLINK has an active function either as a transceiver
or as a dispatcher. There is always only one node with a dispatcher
function in the SIMOLINK ring. All the other nodes are transceivers.
Transceiver
Transceiver
Fig. 8.3-3 SIMOLINK with dispatcher
A table (= task table) is defined in the SIMOLINK dispatcher in which all
telegrams are entered in the order in which they are sent. Each
telegram has an address section (= node address) and a subaddress
section (= channel number) in the telegram header. The telegrams are
entered in the task table with ascending address and subaddress
sections. The SIMOLINK dispatcher initiates telegram traffic by
dispatching all the telegrams one after the other, beginning with the
telegram with the lowest address and subaddress section according to
the entry in the task table. As soon as the SIMOLINK dispatcher has
dispatched all the telegrams, it sends a synchronization telegram
(SYNC telegram) and a pause telegram. After this, it dispatches the first
telegram from the task table again without any delay.
The dispatcher can upread or overwrite the data contents of telegrams,
as can every transceiver.
Compendium Motion Control
Transceiver
Direction of data
Transceiver
Communication / SIMOLINK
Nodes
Dispatcher
Transceiver
Fiber-optic cable
8.3-5