Siemens SIMOTRAS 6SG7050 Operating Instructions Manual page 134

Start-up
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).
A separate address is assigned to each active bus node; the dispatcher is always assigned node
address 0.
A maximum of 8 telegrams can be transferred per active node. The number of telegrams used per
node is a parameterizable quantity.
Telegrams are identified by the node address and distinguished by their channel number of
between 0 and 7, with 2 data words transferred as user data in each telegram. The first channel
number starts with 0 and is counted in ascending sequence.
The assignment between connector values to be transferred and individual telegrams and channels
is also parameterized (see Section 8, Sheet Z122).
Transmission of double-word connectors:
The values of double-word connectors can be transmitted in the first four channels (selected with
U749.01 to U749.04 in the receive direction or with U751.01 to U751.08 in the transmission
direction). In the receive direction, the values of any two adjacent connectors (K) are combined to
form a double-word connector (KK) (e.g. K7001 and K7002 to KK7031). These double-word
connectors can be connected to other function blocks in the usual way. For details of how to
connect with double-word connectors, see Section 9.1, subsection, " The following rules apply to
the selection of double-word connectors ".
In the transmission direction, a double-word connector is applied by entering the same double-word
connector at two contiguous indices of selection parameter U751.
Examples:
7-48
Telegram
Word0 Word1
Application Flags
Channel number
Node address
U751 (0)
.01
KK9498 9498
.02
KK9498 9498
.03
K0401 401
.04
402
K0402
U751 (0)
.01
KK9498 9498
.02
9499
KK9499
.03
401
K0401
.04
402
K0402
L-Word
2x the same KK - number
H-Word
Word
Word
H-Word
2 different KKs !
H-Word
Word
Word
SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
01.04