GW-7552 PROFIBUS/MODBUS GATEWAY Quick Start User Guide
(Version 1.00)
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PROFIBUS input test
--Send Command to write DO of the GW-7552
The user needs to input command (” 01 0F 00 00 00 10 02 FF FF”) here and
click <Send Command> button to send Modbus command and then MBRTU
can receive response message (” 01 0F 00 00 00 10 54 07”). The user can find
byte 0, 1 of input data area of Profibus master device have changed into “FF”
at this time, as shown in the below.
Send modbus command (output data: FF, FF)
Receive “0xFF” in input data area of Profibus master station
Module
Byte
Data type Representation
Value
Input 0
Byte
Hex
0xFF
Input module
Input 1
Byte
Hex
0xFF
PROFIBUS output test
--Send Command to read DI of the GW-7552
The user needs to input command (” 01 02 00 00 00 10”) in MBRTU and
click <Send Command> button to send Modbus command and then MBRTU
can receive response message (” 01 02 02 00 00 B9 B8”). In this message, the
user can know the value of DI0 & DI1 is “0” in the GW-7552.
--Send output data to write DI of the GW-7552 by the Profibus master
The user needs to set “0xFE” & “0xDC” in byte 2 & byte 3 of output data
