User Manual

13.2 Controlling the Instrument over the LAN Interface
364
Setting Items
DHCP
(Dynamic Host Configu-
ration Protocol)
DHCP is a protocol that allows devices to automatically obtain and set their own IP ad-
dresses.
If you enable DHCP and there is a DHCP server operating in the same network, the in-
strument's IP address, subnet mask, and gateway can be obtained and set automatically.
If there is no DHCP server operating, a default IP address is assigned.
Host Name
This is a name that identifies the instrument on the network. Assign a host name that is
different from the names of all other devices. This instrument does not support dynamic
DNS, the name that you set is not registered with a DNS server. PCs on the same network
can refer to the instrument by its host name by using the NetBIOS over TCP/IP protocol.
IP Address
This is an address that identifies an individual device on a network.
Assign an address that is different from the addresses of all other devices. If DHCP is en-
abled, the address is assigned automatically by the DHCP server.
Subnet Mask
This is a setting used to divide an IP address shown to the network into a network address
and a host address. Use the same subnet mask for all devices in the same network. If
DHCP is enabled, the subnet mask is assigned automatically by the DHCP server.
DNS
(Domain Name System)
DNS allows network devices to be specified by their names instead of by their IP address-
es. (An IP address is simply a string of numbers, which it is hard to remember. Device ad-
dresses are easier to understand if they can be specified with names instead of IP
addresses.)
WINS
(Windows Internet
Naming Service)
DNS allows network devices to be specified by their names instead of by their IP address-
es. If there is a WINS server in the network, a name can be obtained by querying that serv-
er.
Gateway IP address
For network connections:
When your PC (or the communicating device) is on another network than this instrument,
set this to [On] and specify the gateway device.
When the PC is on the same network, this is usually set to the same address as the default
gateway in the PC communications settings.
For 1:1 connections between the instrument and a PC:
This setting is not required when the instrument and the PC are connected to the same
hub. Set it to [Off].
If DHCP is enabled, the gateway address is obtained from the DHCP server.
Command Port
(Port number)
The instrument uses the TCP/IP protocol for communications. TCP/IP allows communi-
cating devices to establish multiple connections, which are distinguished by port numbers.
By default the instrument uses port numbers 8800 to 8809.
• 8800 to 8801 reserved
• 8802 (instrument is server): For communications command control
• 8803 to 8809 reserved
Normally these ports do not need to be changed. You can change them if certain ports
cannot be used for security reasons, or if certain ports are not available on the communi-
cating PC. Set only the most significant three digits. The least significant digit (0 to 9) is
used by the instrument, or reserved for use by the instrument.
Header (On/Off)
Use for control of communications commands.
The Header item specifies whether to prefix headers to command response messages.
For more information about commands, refer to the Communications operation manual on
the supplied CD.
Delimiter
The Delimiter item specifies LF, CR, or CR/LF as the newline delimiter in command re-
sponse messages. The instrument understands all three settings: LF, CR, and CR/LF.