User Manual
Table Of Contents
- Chapter 1 Introduction
- Chapter 2 Getting Started
- Chapter 3 Initial IP Configuration
- Chapter 4 Choosing the Proper Operation Mode
- Chapter 5 Web Console Configuration
- Chapter 6 Installing and Configuring the Software
- Appendix A SNMP Agents with MIB II & RS-232 Like Groups
- Appendix B Well Known Port Numbers
- Appendix C Federal Communication Commission Interference Statement
- Appendix D FCC Warning Statement
- Appendix E Service Information
NPort W2250/2150 Plus User’s Manual Web Console Configuration
5-17
Inactivity time
Setting Factory Default Necessity
0 to 65535 ms 0 ms Optional
0 ms: TCP connection is not closed due to an idle serial line.
0-65535 ms: NPort W2250/2150 automatically closes the TCP connection if there is no serial data
activity for the given time. After the connection is closed, NPort W2250/2150 starts listening for
another host’s TCP connection.
This parameter defines the maintenance status as Closed or Listen for the TCP connection. The
connection is closed if there is no incoming or outgoing data through the serial port during the
specific Inactivity time.
If the Inactivity time is set to 0, the current TCP connection is kept active until a connection close
request is received. Although Inactivity time is disabled, the NPort W2250/2150 will check the
connection status between the NPort W2250/2150 and remote host by sending “keep alive”
packets periodically. If the remote host does not respond to the packet, NPort W2250/2150
assumes that the connection was closed down unintentionally. NPort W2250/2150 will then force
the existing TCP connection to close.
ATTENTION
The Inactivity time should be set at least larger than that of Force transmit timeout. To prevent
the unintended loss of data due to the session being disconnected, it is highly recommended that
this value is set large enough so that the intended data transfer can be completed.
ATTENTION
Inactivity time is ONLY active when “TCP connect on” is set to “Any character.”
Data Packing
Delimiter 1/2
Setting Factory Default Necessity
00 to FF (hex) None Optional
Once the NPort W2250/2150 receives both delimiters through its serial port, it immediately packs
all data currently in its buffer and sends it to the NPort W2250/2150’s Ethernet port.
ATTENTION
Delimiter 2 is optional. If left blank, then Delimiter 1 alone trips clearing of the buffer. If the size
of the serial data received is greater than 1 KB, the NPort W2250/2150 will automatically pack
the data and send it to the Ethernet. However, to use the delimiter function, you must at least
enable Delimiter 1. If Delimiter 1 is left blank and Delimiter 2 is enabled, the delimiter function
will not work properly.