Fieldbus Protocols - Pavone Systems DAT 200 Technical Manual

PROFINET PROTOCOL
FIELDBUS data exchange takes place on two separate memory areas, which are described on page 38.
WARNING:
The "Input Data Area" and the "Output Data Area" are of 128 bytes
To transfer the parameters of the Output Data Area to the instrument you need to enable direct access
to the memory, writing the hexadecimal value 0x7FFF in the Command Register (1 word in writing) in
order to avoid that the instrument resets all its variables in the case of uninitialized Output Data Area
This command must be sent before the connection to inform the instrument that the parameters have
been initialized by the master. Now, the instrument continually tests the changes made to the parameters
and stores them only in case of real change.
PROFINET S7 300 PROCEDURE CONNECTION
1. gsd file installation.
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