Communications configuring
3-16
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
The value at output YTS can be read as decimal number using CFC.
Additional information
regarding the significance of the decimal number, refer to the online help
"Help on events".
3.1.4
Mode of operation of the couplings
A coupling functions as follows:
•
CPUs transfer data with a coupling module via the backplane bus (C-
or L bus).
•
For serial couplings (e. g. for SINEC H1) the firmware on the coupling
module "re-structures" and "packages" the data, so that they
correspond to the required telegram structure and protocol.
•
If the communications partner is also a SIMADYN D (subrack
coupling, buffer memory coupling), then the data are not conditioned.
Data transfer via
backplane bus
CPU
Coupling module
Data interface
Serial connection
(connector at the
front panel)
Re-structuring and packaging
of the data is realized by the firmware
on the coupling module
Fig. 3-6
Data transfer between the CPU and coupling module
•
The C- and L buses are structured the same, have the same mode of
operation and the same performance features.
•
The coupling module bus connection defines whether data are trans-
ferred between the CPU and the coupling module via the C- or L bus.
As the data interfaces are located on external coupling modules and not
locally on a CPU, they can be used by all CPUs in a subrack. However to
use a data interface, the CPU and the coupling module must have the
same bus connection.
NOTE
For the local CPU coupling, the data interface is located on the CPU
RAM. This data interface cannot be accessed by any of the other
subrack CPUs. It can only be used by that CPU on which it was
configured.
Fault diagnostics
General
C- and L bus
Access to the data
interface