ICS-Series User Manual

User’s Manual of ICS-11x Serial Device Server Series
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4.5.2.5 TCP Server mode
When the serial server is configured as a TCP server, it waits for a connection initiated by another network device. User must
set the local TCP port number for which it will listen for the connection, and the serial server provides the maximum number of
two concurrent connections. Incidentally, serial server can be configured as a client or server. The TCP server mode topology in
Figure 4-5-115 appears.
Figure 4-5-15: TCP Server Mode Topology
The TCP server mode screenshot in Figure 4-5-16 appears.
Figure 4-5-16: TCP Server Mode Screenshot
Object Description
• TCP Keep-alive
Interval
TCP keep alive interval shows how many seconds the unit waits during an inactive
connection before checking its status. If the unit does not receive a response, it will drop
that connection. The default is 0 minute.
• Quiescent Time
When the network connection is determined to be idle, the duration of the control
network inactivity will cause the connection to be forcfully closed. The range of value is
from 1 to 65535 ms. The default is 0 ms
• Max connection
This parameter set the TCP port number on which it will listen for the connection and set
the maximum (up to two) acceptable number of connections. The range of value is from
1 to 4. The default is 1.
• Local TCP port
This parameter describes the TCP port that communicates with the connected device.
The setting slave and master destination IP parameters must use the same value to
achieve communication. The range of value is from 1 to 65535. The default is 5004 for
port 1, 5005 for port 2, 5006 for port 3 and , 5007 for port 4
• Frame Length
This parameter can be used to control the data packet. When the device port is in the
buffer until the specified data is accumulated, the data will be packed and transmitted by
the network. This parameter is 0 to indicate that the data will not be packed until the
buffer is full. The range of value is from 0 to 1024. The default is 0.