Communications configuring
3-166
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
When selecting the operating mode, it should be noted, that interrupt task
processing can interrupt cyclic tasks at any time. This can influence the
timing. For the non-synchronous mode, the SIMOLINK cycle is delayed
and for the external cyclic mode, T0 must be adapted to prevent
computation time overflow or multiple sending of the same values which
have not been re-calculated.
Synchronization to the base sampling time T0 can be set in 100 µs
intervals while interrupt tasks are initiated by the SYNC telegram,
dependent on the telegram duration.
3.17.4 Configuring - first steps
Using as an example a master-slave coupling, the necessary settings are
subsequently described which must be or should be observed when
configuring.
FM
458
EXM
448-1
SLB-
Modul
SIMATIC S7-400
SL master
e.g. FM 458 with EXM 448-1
Slaves/transceiver
e.g. MASTERDRIVES MC or
automation system with ITSL / EXM 448-1
SIMOLINK ring
SLB-
Mod-
ule
SLB-
Mod-
ule
SLB-
Mod-
ule
SLB-
Mod-
ule
Fig. 3-61
Example for a master-slave coupling
The SIMOLINK ring comprises the minimum of two and a maximum of
201 SLB modules, which are coupled to one another through fiber-optic
cables. There is only one SL master on a ring. All of the other nodes are
slaves.
An SLB module is a hardware component of an ITSL, an EXM 448-1
module or an option module SLB (
S
IMO
L
INK
B
oard, Order No.
6SX7010-0FJ00).
NOTE
Additional information on these modules and their installation is
provided in the User Manual D7-SYS “Hardware“, or SIMOVERT
MASTERDRIVES Instruction Manual SLB SIMOLINK board.
Cyclic or interrupt
task ?
Hardware