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ICP DAS WISE User Manual
Modbus RTU Master (Connect to Modbus RTU slave devices)
Figure 5-27：COM Port Interface Setting for Modbus RTU Master
The settings steps are as below:
i In the "Baudrate" field, select the Baudrate from the dropdown list,
the Baudrate of WISE and Modbus RTU slave module have to be
set the same.
ii In the "Parity" and "Stop bits" fields, set up the Parity and Stop
bits. The Parity and Stop bits of WISE and Modbus RTU slave
module have to be set the same.
iii In the "Silent Interval" field, input the time interval between
successive sending of commands from the WISE to the Modbus
RTU slave module, the unit will be millisecond (ms).
iv After all settings are completed, click "Save" button to save the
changes.
Please Note: After the "Baudrate" is selected, the system will
automatically generate a proper value in the "Silent Interval" field.
For each Modbus RTU Slave module has different Modbus
command process capability, the response time for sending result
from Modbus RTU Slave module to WISE might be different. The
user can adjust this value to most appropriate time interval, such as:
extend this value to make sure every Modbus RTU Slave module
connected to the WISE has enough time to process the Modbus
command, or shorten this value to improve the efficiency of the
polling mechanism between Modbus RTU Slave module and WISE.
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