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Modbus RTU
M-LINK has a free TCP/RTU gateway. You can read the measurement point data of any RTU slave device via Ounet.
You can also add bus devices to M-LINK.
Factory
Setting
setting
Modbus master settings
Timeout
1000 ms
Min delay
100 ms
between packets
Timeouts to fault
5
state
Modbus RTU slave settings
Function in use
Slave address for
1
internal registers
Serial port (A1,B1) settings
Port baudrate
9600
Data bits
8
Parity
None
Stop bits
1
Logs
When you click the "Update log", 50 latest descriptions of bus communication errors are updated to the screen. Errors may occur in ga-
teway traffic or communication of the Master device. The log shows a time stamp indicating the time the error message was received,
the function it concerns, the slave device register the error is present in, how many items of register data the register contains, and
where the error shows up.
Description
These settings are in use when "Master" is selected as the function of the M-Link device
Modbus master timeout
Minimum delay between packets. If a device in the bus is unstable, bus traffic can be restored
by increasing the delay between packets.
This setting determines the number of unanswered requests made to a slave device before
changing the state of the device to fault state. A signal strength alarm is raised when the in-
coming delay time has passed while the fault state was active.
Refresh view.
The M-Link device can be on the bus either as a master device or as a slave device. Configu-
ring M-Link as a slave requires OuflexTool programming. In this case, master-points from the
third party device are read by means of M-Link to Ounet.
Speed of traffic in the bus. The devices connected to the same bus must have the same traffic
speed (baud rate). The default rate is 9600 bauds, but it can be changed.
Number of data bits in the bus. The devices connected to the same bus must have the same
Data bits value.
Parity of the bus. None = parity is not taken into account. Set the same parity as here for all
devices in the bus.
Number of stop bits in the bus. The devices connected to the same serial port must have the
same Stop bits setting.
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