GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual
(Version 1.60, May/2017)
PAGE: 19
3. Communication protocol transfer theorem
3.1 Profibus data exchange
The GW-7552-B / GW-7552-M is a Profibus DP slave device. The GW-7552-B /
GW-7552-M is first parameterized then configured and finally it goes into the data
exchange mode (
Figure 15
).
Figure 15 State machine of Profibus DP slave device
The GW-7552-B / GW-7552-M exchanges data cyclically between internal DI
、
DO
、
AI
、
AO data and Profibus master device in data exchange mode, as shown
in
figure 16
.