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Programmable Field Bus Controller 750-833
Process Image
3.4.2 Allocation of the Input and Output Data
The process data is exchanged via PROFIBUS with the higher ranking
controls (Master). A maximum of 244 bytes (128 byte up to SW 02) of data is
transmitted from the master to the controller, or node, to the output data. The
controller returns a maximum of 244 bytes (128 byte from SW 03) input data
as a reply to the master.
When projecting a node, the individual modules are configured according to
their physical arrangement. These modules can be copied from a hardware
catalogue of the projecting tool. The information covering the possible
modules is saved in the GSD file.
The controller generates an internal mapping according to the installed and
configured settings of the node, in which the allocation of the input and output
data is determined in the local process image with the position in the
PROFIBUS DP Telegram.
Fig. 3.4.2-9: Allocation of the input and output data
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WAGO-I/O-SYSTEM 750
Bus System
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