1.3 10BASE-T LAN Communications
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Gateway
A gateway is a device that connects different networks.
To communicate with a device on a network with a different
address, you have to set the IP address of the device as the gate-
way. Set the same gateway for all devices on the same subnet.
When you communicate only with the devices on the same subnet
(for example, if you connect the instrument to a PC only), select
OFF.
When DNS is enabled and if the IP address is not 0.0.0.0, use that
IP address. If the IP address is 0.0.0.0, obtain the IP address cor-
responding to the name of the gateway from DNS. When you set
the name of the gateway, use the fully qualified domain name
(FQDN), such as "dns.hioki.co.jp." If you use the host name only,
like "dns," you may not get the IP address from DNS.
When DHCP is ON and you have obtained gateway information
from the DHCP, this information is given priority.
DNS (Domain Name System)
With the TCP/IP protocol, each individual device is identified by the
IP address. The addresses consist of a series of numbers and
they are not easy to remember. To simplify, a text-based host
name is used instead of an IP address. On a network, host names
and IP addresses have to be converted from one to the other.
There are two systems to perform such conversion; DNS and
WINS. This instrument uses the DNS system.
When DNS is on a network, with DNS turned ON and the IP
address of the DNS server specified, you can specify the device
with which you want to communicate using its text name.
When DHCP is ON and you have obtained DNS information from
DHCP, this information is given priority.
Delimiter, Header
Set the delimiter and header when you use the "Control by commu-
nications" commands.
In the default setting, character string commands are transmitted
through the TCP protocol connection to port No.8802 of the instru-
ment.
❖ For details of the commands, see the Interface Manual on the Application
Disk (CD-R).
The delimiter sets a new line for the command response. The
instrument accepts both LF and CR+LF from a PC.
"Header" sets whether a header is added to the command
response.
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