YOKOGAWA TA220 User Manual page 89

Explanation
IM 704610-01E
9.3 Entering the TCP/IP and Timeout Settings, and Confirming the MAC Address
Each TCP/IP setting must be entered to use the network functions on the instrument.
Ethernet Communications
The instrument can be controlled using communication commands sent from a PC via
the Ethernet interface.
DHCP (Dynamic Host Configuration Protocol)
DCHP is a protocol that allocates setup information that is needed temporarily to PCs
connecting to the network. When DHCP is turned ON, the following settings are
automatically assigned.
IP address
Subnet mask
Default gateway
• To use DHCP, the network must have a DHCP server. Consult your network
administrator to see if DHCP can be used.
• When turning DHCP from OFF to ON, up to ten seconds may be required to obtain
the IP address.
• When DHCP is turned ON, different settings may be assigned each time the power is
turned ON. When accessing the instrument from a PC, be sure to check the IP
address and other settings of the instrument each time you turn it ON.
IP Address (Internet Protocol Address)
You can assign an IP address to the TA220. The setting cannot be assigned unless
DHCP is turned OFF.
• The IP address is an ID that is assigned to each device on an IP network such as the
internet or an intranet.
• The address is a 32-bit value expressed using four octets (each 0 to 255), each
separated by a period as in 192.168.111.24.
• Obtain an IP address from your network administrator.
• The setting is automatically configured in environments using DHCP.
Subnet Mask
You can set the mask value used when determining the subnet network address from
the IP address. The setting cannot be assigned unless DHCP is turned OFF.
• Huge TCP/IP networks such as the Internet are often divided up into smaller networks
called sub networks. The subnet mask is a 32 bit value that specifies the number of
bits of the IP address used to identify the network address. The portion other than the
network address is the host address that identifies individual computers on the network.
• Consult your network administrator for the subnet mask value. You may not need to
set the value.
• The setting is automatically configured in environments using DHCP.
Default Gateway
You can set the IP address of the gateway (default gateway) used to communicate with
other networks. The setting cannot be assigned unless DHCP is turned OFF.
• The default gateway has control functions that handle protocol exchanges when
communicating with multiple networks, so that data transmission is carried out
smoothly.
• Consult your network administrator for the default gateway value. You may not need
to set the value.
• The setting is automatically configured in environments using DHCP.
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