B&B Electronics GW-7553 - Manual - Manual (Page 21)

GW-7553 PROFIBUS/Modbus TCP Gateway User Manual (Version 1.00, Dec/2008) PAGE: 21
hen the GW-7553 acts as a Modbus Slave device, it can receive query message
Figure 20 The GW-7553 receive data from Modbus Master device
Figure 21 The GW-7553 output data to Modbus Master device
W
from Modbus Master device and then saving to internal DO、AO memory space.
It can also send response message to Modbus Master device through internal DI、
AI data, as shown in figure 20
、 21.