User`s manual

NPort S8000 Series Basic Settings and Device Server Configuration
5-8
DNS IP Address
Setting Description Factory Default
1st DNS Server’s
IP Address
The IP address of the DNS Server used by your network.
After
entering the DNS Server’s IP address, you can input the
NPort
S8455-MM-SC’s URL (e.g., www.NPort
S8455-MM-SC.company.com) in your browser’s address field,
instead of entering the IP address.
None
2nd DNS Server’s
IP Address
The IP address of the DNS Server used by your network. The
NPort S8455-MM-SC will try to locate the 2nd DNS Server if the
1st DNS Server fails to connect.
None
When the user wants to visit a particular website, the computer asks a Domain Name System (DNS) server for
the website’s correct IP address, and the computer user the response to connect to the web server. DNS is the
way Internet domain names are identified and translated into IP addresses. A domain name is an alphanumeric
name, such as moxa.com, that is usually easier to remember. A DNS server is a host that translates this kind
of text-based domain name into the numeric IP address used to establish a TCP/IP connection.
In order to use the NPort’s DNS feature, you need to set the IP address of the DNS server to be able to access
the host with the domain name. The NPort provides DNS server 1 and DNS server 2 configuration items to
configure the IP address of the DNS server. DNS Server 2 is included for use when DNS sever 1 is unavailable.
The NPort plays the role of DNS client. Functions that support domain name in the NPort are Time Sever IP
Address, TCP Client-Destination IP Address, Mail Server, SNMP Trap IP Address, and IP Location
Server.
TCP alive check time
Setting Description Factory Default
0 to 99 min This field specifies how long the NPort S8000 will wait for a
response to “keep alive” packets before closing the TCP
connection. The NPort S8000 checks connection status by
sending periodic “keep alive” packets. If the rem
ote host does
not respond to the packet within the time specified in this field,
the NPort S8000 will force the existing TCP connection to close.
For socket and Real COM Mode
, the NPort S8000 will listen for
another TCP connection from another host after closing the
connection. If the TCP alive check time is set to 0, the TCP
connection will remain open and will not send any “keep alive”
packets.
7 min
All serial ports use the same TCP live check time in NPort S8000.
Serial Settings
Operation Modes
Click on Operation Modes, located under Serial Settings, to display serial port settings for 4 serial ports. To
modify serial operation mode settings for a particular port, click on Operation Modes of the serial port in the
window of right hand site.