Item Description
Baud rate
Can be selected from 1200, 2400, 4800, 9600, 19200, 38400, 57600, and
115200
Parity Can be selected from EVEN, ODD, and NONE
Data bits
Data bit length between start bit and stop bit
Settable value: 7 bits and 8 bits (Settable: 0 to 255)
The default value of Modbus is 8 bits.
Stop bit
Settable value: 1 bit and 2 bits
The default value of Modbus is 1 bit.
8. Double-click
"Modbus Master, COM Port" in the navigator pane.
The "Modbus_Master_COM_Port" object will be displayed.
Select the "General" tab and set appropriate values for each item.
Item Description
Transmission mode
RTU: Binary transmission
ASCII: ASCII code transmission (Not supported)
Response timeout [ms]
[0..65535]
Waiting time for response from slave
* If a response timeout period is set in the slave device, the settings in the
slave device will take ef
fect.
Time between frames [ms]
[0..65535]
Time period during which master transmission is paused from when the last
response is received until the next command is sent
Auto-restart
communication
When the check box is selected: After a communication error occurs, the
communication status is automatically checked. When the communication is
restored, reconnection is performed.
When the check box is not selected: After a communication error occurs,
reconnection is not performed.
"ModbusGenericSerialMaster I/O Mapping" tab: Select a bus cycle task that performs
Modbus communication.
9. Double-click
"Modbus Slave, COM Port" in the navigator pane.
The "Modbus_Slave_COM_Port" object will be displayed.
13.3 MODBUS
WUME-GM1RTXOP-01 13-33
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