QUICKDESIGNER Profibus •
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A byte is 8 bits, therefore the addressing method is to use a period as the bit delimiter in the addressing
format. For example, I0.0 is bit 0 of Word 0, and I0.7 is bit 7 of Word 0.
Profibus DP Protocol Dialog Box
The number of Input and Output words and the addressing will determine the valid address range limits
for each variable type. The variable type names are fixed and are displayed in a cell corresponding to
the addressing type. A word addressing example is shown below.
GSD Files
PROFIBUS devices have different performance characteristics. Features differ in regard to available
functionality (i.e., number of I/O signals and diagnostic messages) or possible bus parameters such as
baud rate and time monitoring. These parameters vary individually for each device type and vendor. To
achieve simple Plug and Play configuration of PROFIBUS, the characteristic features are specified in
an electronic data sheet sometimes called a device data base file or GSD file. Standardized GSD data
expand open communication up to the operator control level. Using configuration tools based on GSD
files makes integration of devices from different vendors in a bus system simple and user-friendly.
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