Communications
configuring
System- and communication configuring D7-SYS - SIMADYN D
3-17
Edition 12.2003
A coupling module is always initialized (basic initialization) at system run-
up.
The CPU to the left of the coupling module and with the same bus
connection as the coupling module executes the following tasks:
•
checks as to whether the coupling module can be "addressed"
•
formats the data interface
The required coupling module is configured in HWConfig. When
initializing a coupling (basic initialization), no explicit configuring steps
must be executed.
3.1.4.1
Central coupling blocks
The central coupling blocks have the following functions for a coupling:
•
Initialization:
−
copying the configured initialization information (this is configured
at the initialization inputs) at the data interface
−
defines as to whether the data interface is in an error-free
condition.
•
Enabling:
−
after initializing by the central coupling blocks and the coupling
module firmware, the central coupling block enables the coupling
for all transmitters and receivers in the same subrack. Data
transfer can now start.
−
for timing reasons, a coupling is always enabled in the RUN
condition after several sampling times.
•
Monitoring:
−
the central coupling blocks provide information at their outputs
about the status of the coupling and, if relevant, the status of the
firmware.
When configuring, the following points must be observed:
•
Exactly one central coupling block must be configured for each
coupling.
•
The central coupling blocks can all be configured on a CPU of a
subrack or they can be distributed over various CPUs of a subrack.
−
configuring all central coupling blocks on a CPU simplifies, for
example, diagnostics.
•
Central coupling blocks have no transmit- or receive functionality.
•
All central coupling blocks must be configured in a sampling time
32 ms
≤
TA
≤
256 ms
Basic initialization
Configuring the
coupling module
Function of the
central coupling
blocks
Configuring the
central coupling
blocks
