B&B Electronics GW-7552 - Manual User Manual

Page 27

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GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 27

When the GW-7552 acts as a Modbus slave device, the data exchange runs
continuously between Profibus master and the GW-7552 and the data exchange
runs between Modbus master device and the GW-7552, when GW-7552 receive
query message from Modbus master device, as shown in figure 28

、

29.

Figure 28 GW-7552 (slave mode) communication protocol transfer