GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual
(Version 1.60, May/2017)
PAGE: 23
Figure 21 Data exchange between the Modbus devices and the GW-7552-B /
GW-7552-M
When the GW-7552-B / GW-7552-M acts as a Modbus master device, it can get
query message through module parameter and DO
、
AO data and send query
message to Modbus slave device. It can also receive response message form
Modbus slave device and then saving to internal DI
、
AI memory space
,
as
shown in
figure 22
、
23
.