Communication protocol transfer theorem – B&B Electronics GW-7553 - Manual User Manual

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GW-7553 PROFIBUS/Modbus TCP Gateway User Manual (Version 1.00, Dec/2008) PAGE: 16

3. Communication protocol transfer theorem

3.1 PROFIBUS data exchange

The GW-7553 is a PROFIBUS DP Slave device. The GW-7553 is first
parameterized then configured and finally it goes into the data exchange mode
(Figure 11).

Figure 11 State machine of PROFIBUS DP Slave device


The GW-7553 exchanges data cyclically between internal DI、DO、AI、AO
data and PROFIBUS Master device in data exchange mode, as shown in figure 12.

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