B&B Electronics GW-7552 - Manual - Manual (Page 51)

GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 51
Figure 49 Send Modbus command to read DI of the GW-7552 and
receive data (0xFE, 0xDC)
PS:
Modbus command:
Query message
DA FC
SA
(Hi)
SA
(Lo)
NO
(Hi)
NO
(Lo)
CRC
check
01 02 00 00 00 10 79 C6
Response message
DA FC BC DATA
CRC
check
01 02 02 FE DC F8 41