User's Manual
Table Of Contents
- 1. Introduction
- 2. Getting Started
- 3. Initial IP Configuration
- 4. Introduction to Operation Modes
- 5. Web Console: Basic Settings
- 6. Web Console: Network Settings
- 7. Web Console: Serial Port Settings
- 8. Web Console: System Management
- 9. Web Console: System Monitoring
NPort W2150A/W2250A Series Web Console: Serial Port Settings
7-15
TCP Alive Check Time
Default 7 min
Options 0 to 99 min
Description This field specifies how long the NPort will wait for a response to “keep alive” packets before
closing the TCP connection. The NPort checks connection status by sending periodic “keep
alive” packets.
0: The TCP connection will remain open even if there is no response to the “keep alive”
packets.
1 to 99: If the remote host does not respond to the packet within the specified time, the
NPort will force the existing TCP connection to close.
Inactivity time
Default 0 ms
Options 0 to 65535 ms
Description
This field specifies the time limit for keeping the connection open if no data flows to or from
the serial device.
0: The connection will remain open even if data is never received. For many applications, the
serial device may be idle for long periods of time, so 0 is an appropriate setting.
1 to 65535: If there is no activity for the specified time, the connection will be closed. When
adjusting this field, make sure that it is greater than the Force transmit time. Otherwise, the
TCP connection may be closed before data in the buffer can be transmitted.
Ignore jammed IP
Default Disable
Options Disable, Enable
Description This field specifies how an unresponsive IP address is handled when there are simultaneous
connections to the serial port.
Disable: All transmission will be suspended if one IP address becomes unresponsive.
Transmission will only resume when all hosts have responded.
Enable: Data transmission to the other hosts will not be suspended if one IP address becomes
unresponsive.
Destination address 1 to 4
Default
Options IP address and port (e.g., “192.168.1.1” and “4001”)
Description This field specifies the remote host(s) that will access the attached device. At least one
destination must be provided. This field supports the use of domain names and names
defined in the host table.
ATTENTION
In TCP Client mode, up to 4 connections
can be established between the serial port and TCP hosts. The
connection speed or throughput may be low if any one of the four connections is slow, since the one slow
connection will slow down the other 3 connections.