Omron SYSMAC C200HW-PCS01-EV1, Руководство по эксплуатации

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7-5 Setting Up the Ethernet Environment
The Ethernet communications environment must be set up to perform Ethernet
communications from a PC Card Unit. This section describes how to set up the
Ethernet environment with the setup software.
Refer to 7-6 Setup Software Operation for details on how to use the setup soft-
ware.
7-5-1 IP Address
Because a PC Card Unit uses an Ethernet expansion function (UDP/IP and
TCP/IP), it must have its own IP address. An IP address is used to identify each
node (such as computers, CV-series Ethernet Units, and PC Card Units) on an
Ethernet network. IP addresses must be set and managed to ensure that each
address is unique.
IP Address Structure An IP address is a 32-bit binary data, consisting of a network number and a host
number. The network number is an address used to identify each network. The
host number is used to identify each host (i.e., node).
IP addresses are divided into three classes: Class A, Class B, and Class C.
Select an applicable class according to the scale of the network being used.
Class A Network no. (7 bits) Host number (24 bits)
1 1 0
Network number (21 bits) Host number (8 bits)
0 1 Network number (14 bits) Host number (16 bits)
0
0 8 31
0 1 16 31
0 1 2 24 31
Class B
Class C
Bit
Bit
Bit
The numbers of networks and hosts that can be identified differ according to the
class.
Class Number of networks Number of hosts
Class A Small More than 65536 (2
16
)
Class B Medium 256 (2
8
) to 65536 (2
16
)
Class C Large Less than 256 (2
8
)
An IP address consists of 32 bits divided into four segments of 8 bits each. These
segments are separated with a dot and represented as four decimal numbers.
Example: 10000010 00111010 00010001 00100000
→
130.58.17.32
Note 1. All nodes within a network must have the same network number.
2. The network number of an IP address is used to identify each Ethernet net-
work (IP network segment). The network number is not the same as the net-
work address used for FINS communication.
3. An IP network segment is a logical network consisting of nodes that have the
same network number.
Assigning IP Addresses Assign a unique IP address to each node within a network (or among multiple
networks).
The internet protocol (IP) is a standard international communications protocol.
Therefore, obtaining an IP address from a public organization prevents address-
related problems when the network is expanded in the future. Obtaining an offi-
cial IP address is not required for a local Ethernet network that is not connected
to outside networks. We do, however, recommend that you obtain an official IP
address if there is any chance of connection to outside networks at any time in
the future.
Setting Up the Ethernet Environment
Section 7-5