UR75 User Guide
105
Figure 4-4-2-2
DTU Mode
Item
Description
Default
DTU Protocol
Select from "None", "Transparent", "Modbus", and "TCP server".
- Transparent: the routed is used as TCP client/UDP and transmits
data transparently.
- TCP server: the router is used as TCP server and transmits data
transparently.
- Modbus: the router will be used as TCP server with modbus
gateway function, which can achieve conversion between Modbus
RTU and Modbus TCP.
--
TCP Server
Listening port
Set the router listening port. Range: 1-65535.
502
Keepalive Interval
After TCP connection is established, client will send heartbeat packet
regularly by TCP to keep alive. The interval range is 1-3600 in seconds.
75
Keepalive Retry
Times
When TCP heartbeat times out, router will resend heartbeat. After it
reaches the preset retry times, TCP connection will be reestablished.
The retry times range is 1-16.
9
Packet Size
Set the size of the serial data frame. Packet will be sent out when
preset frame size is reached. The size range is 1-1024. The unit is byte.
1024
Serial Frame
Interval
The interval that the router sends out real serial data stored in the
buffer area to public network. The range is 10-65535, in milliseconds.
Note: data will be sent out to public network when real serial data size
reaches the preset packet size, even though it's within the serial frame
interval.
100
Table 4-4-2-2 DTU Parameters
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