Siemens SIMOREG DC Master 6RA7028-6DS22 Operating Instructions Manual page 176

Start-Up
Process data are connected to the SIMOLINK board through assignment of the
4
corresponding connectors and/or binectors to telegram addresses and channel numbers
(see Section 8, Sheet SIMOLINK Board: Receiving, Transmitting").
Example:
U749.01 = 0.2
U740.01 = 1
U751.01 = 32
U751.02 = 33
Changes to the settings of the receive data parameters do not take effect until the electronics
power supply is switched on again.
SIMOLINK (Siemens Motion Link) is a digital, serial data transmission protocol which uses fiber
optics as a transmission medium. The SIMOLINK drive link has been developed to allow a fast,
cyclic exchange of process data (control information, setpoints, status information and actual
values) via a closed ring bus.
SIMOLINK consists of the following components:
SIMOLINK Master
Active bus node as interface to higher-level automation systems (e.g. SIMATIC M7 or
SIMADYN)
SIMOLINK Board (SLB)
Active bus node as interface for drives on SIMOLINK
SIMOLINK Switch
Passive bus node with switching function between two SIMOLINK ring busses. The
separating filter and concentrator are identical in terms of hardware, but perform different
functions. Separating filters are used to reverse the signal flow, e.g. in order to link the nodes
on one ring bus to another ring bus after the failure of their master. Concentrators allow ring
segments to be star-connected to form a complete ring.
Fiber optic cables
Transmission medium between the SIMOLINK nodes. Glass or plastic fiber optic cables can
be used. The permissible maximum distances between adjacent nodes in the ring differs
depending on the type of fiber optic used (plastic: max 40m, glass: max. 300m).
SIMOLINK is a closed fiber optic ring. One of the nodes on the bus has a dispatcher function
(SIMOLINK master or SLB parameterized as the dispatcher). This dispatcher node is identified by
node address 0 and controls communication on the bus. Using SYNC telegrams, it supplies the
common system clock cycle for all nodes and sends telegrams in ascending sequence of telegram
addresses and channel numbers in the task table. The task table contains all telegrams which are
transmitted cyclically in normal data interchange.
When an SLB is employed as the dispatcher, the task table is configured solely on the basis of
drive parameters. The following restrictions apply as compared to the use of a SIMOLINK master
as the dispatcher:
Flexible address lists with gaps in address sequence are not allowed on the bus. Addresses
are assigned consecutively to the nodes, starting with address 0.
The number of telegrams (channels) used per node is identical for all nodes.
It is not possible to use application-specific special data.
All other active bus nodes apart from the dispatcher are transceivers. These simply forward
telegrams (with updated contents in some cases) along the bus.
Active bus nodes receive and/or send telegrams (SIMOLINK master, dispatcher, transceivers).
Passive bus nodes simply forward received telegrams along the bus without changing their
contents (separating filters, concentrators).
7-34
means that the values of node 0 / channel 2 are read as word1
(K7001) and word2 (K7002)
means that node 1 in channel 0 transmits status word 1 (K0032) as
word1 and status word 2 (K0033) as word2
SIEMENS AG
SIMOREG DC Master Operating Instructions
02.00
6RX1700-0AD76