SENA PS810 - Manual (Page 50)

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 Inactivity Timeout
In UDP mode, Inactivity Timeout is used in maintaining recent unlisted remote host. If there is no data
transmission between unlisted remote host and serial port of Pro Series during Inactivity Timeout, Pro
Series will not send data from a serial port to the recent unlisted remote host again. Namely, Inactivity
Timeout in UDP mode is the time maintained recent unlisted remote host list by Pro Series.
Note: If user set Inactivity Timeout as 0 in UDP mode, Pro Series does not allow any new connection
from/to remote host if the number of current remote host exceeds Max. allowed connections.
 Socket ID
When many Pro Series devices connect a same remote host(s), sometimes it is needed to identify the
device. In this case, Socket ID is available for identification of each device. Pro Series send the Socket
ID string before starting the data transmission. User can define Socket ID with a specific string. In UDP
mode, specified Socket ID strings are added to the head of every packet.
 DTR/DSR behavior
Purpose of the DTR/DSR pin is to control UDP connection state by using serial port signal. The DTR is
a write-only output signal, whereas the DSR is a read-only input signal in the Pro Series.
The DTR option can be set to one of three options:
Always HIGH: The state of the DTR pin is maintained high.
Always LOW: The state of the DTR pin is maintained low.
High when TCP/UDP is opened: The state of the DTR pin will be maintained high if the UDP
connection is established.
The DSR behavior can be set to one of two options:
None: Incoming connection from remote host is always allowed and nothing is done even though
the state of DSR pin changes.
Allow TCP/UDP connection only by HIGH: Pro Series receives UDP data from the remote host
only when the DSR status is high.
Note:
1. DTR/DSR behavior is not effective in RS422 and RS485 mode.
 Accept UDP datagram from unlisted remote host
If Accept unlisted (Accept UDP datagram from unlisted remote host) function is set as ‘No’, Pro Series
will accept only incoming UDP datagram from the remote host(s) configured on remote host
configuration. On the contrary if Accept unlisted function is set as ‘Yes’, Pro Series will accept all
incoming UDP datagram regardless remote host configuration.
 Send to recent unlisted remote host
If Send unlisted (Send to recent unlisted remote host) function is set as ‘Yes’, Pro Series sends data to