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This utility simulates a Modbus master device and can be downloaded from
the following directory:
http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/modbus/modbus_utility/
(1) Set the COM port number of the PC
(2) Set the Baud rate to 115200
(3) Set the Line control to N,8,1
(4)Open the connection
Figure 44 MBRTU Utility
--Send Command to write DO of the GW-7552-B
The user needs to input command (" 01 0F 00 00 00 10 02 FF FF") and click
<Send Command> button to send Modbus command: "01 0F 00 00 00 10 02
FF FF E3 90" and then MBRTU can receive response message (" 01 0F 00 00
00 10 54 07"). The fields IB 4 and IB 5 (means byte 0, 1 in "Input
Relay/Coil" module) of the input data area in the variable table of
configuration program "Step 7 manager" have been changed to "FF" at this
time, as shown in the below.
GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual (Version 1.60, May/2017) PAGE: 47
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