X20 system modules • X20 electronics module communication • X20CS1030
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X20 system User's Manual 3.10
4.18.6.7.10 FlatStream communication
4.18.6.7.10.1 Introduction
B&R offers an additional communication method for some modules. "FlatStream" was designed for X2X and
POWERLINK networks and allows data transmission to be adapted to individual demands. Although this method
is not 100% real-time capable, it still allows data transmission to be handled more efficiently than with standard
cyclic polling.
X2X
FlatStream
Cyclic
communication
Cyclic
communication
Field device
language
B&R field device
B&R field device
B&R field device
B&R module
B&R module
B&R module
PLC or
Bus controller
PLC or
Bus controller
PLC or
Bus controller
B&R CPU
B&R CPU
B&R CPU
Device command
X2X-compatible
device command
as a bridge
cached value
Cyclic call
of cached values
Acyclic call
of cached values
Cyclic call
via I/O mapping
Acyclic call
via
library functions
cached value
Figure 489: Three types of communication
FlatStream extends cyclic and acyclic data queries. With FlatStream communication, the module acts as a bridge.
It is used to pass CPU queries directly on to the field device.
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