Communications configuring
3-268
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
channel name, the sender only specifies the '@' character at
its AT connection.
(Refer to Fig. case 3.)
−
For a
bi-directional select/multiple-connection,
the sender
multiple/receiver selection cannot make any specification.
Case 2.)
and 3.) simultaneously occur in this case
.
In addition to the
channel name, the sender-multiple/receiver select only
specifies the '@' character at its US connection
. (Refer to Fig.
case 4.).
The following diagram clearly illustrates the situation.
BGT1 with data interface BG1___A
Sender-Multiple:
AT connection: "Channel.@"
Sender-Handshake/Refresh:
AT-Anschluß: "[email protected]___A"
Sender-Select
AT connection: "[email protected]___A"
Receiver-Multiple:
AR connection: "[email protected]__A"
Receiver-Handshake/Refresh:
AR connection: "[email protected]___A"
Receiver-Select
AR connection: "Channel.@"
BGT2 with data interface BG2___A
Sender-Multiple/Empfänger-Select:
US connection: "Channel.@"
Receiver-Multiple/Sender-Select
US connection: "[email protected]__A"
1.)
2.)
3.)
4.)
3.23.3.2
Assigning the data interfaces to the configured NTCs
The NTC has the task to search for network channels. In this case, it
cyclically searches for the data interfaces, assigned to it from @NMC.
The @NMC function block automatically determines whether an NTC
function block was successfully configured. If this is the case, then it
distributes the configured data interfaces to the configured NTCs. It
proceeds as follows:
It consecutively assigns the data interfaces for all function blocks NTC. If
all of the NTC data interfaces have been assigned, and if non-assigned
data interfaces are still available, it starts again at the first NTC. The NTC
are handled in the log-on sequence; the data interfaces according to
increasing slot number. If there are more NTC function blocks than there
are data interfaces, the superfluous NTC go into the "
OFF
" condition.
It does not make sense to configure NTC function blocks in different
sampling times, as generally it cannot be determined which NTC are
assigned to which data interface.
