Parker ACR Series Programmer's Guide

Parker Hannifin
The address consists of a network ID and a host ID. The network
ID acts as a general address, like a zip code; The host ID is the
address for a specific device within the network, like a home
address. Most IP addresses fall into one of the following address
classes:
• Class A range. The first 8 bits are for the network ID; The
remaining 24 bits are for the host ID.
• Class B range. The first 16 bits are for the network ID; The
remaining 16 bits are for the host ID.
• Class C range. The first 24 bits are for the network ID; The
remaining 8 bits are for the host ID.
The number of bits used for the network ID determine how many
hosts a given address can support. Class A networks provide a
small number of network IDs but a very large number of host IDs.
And class C networks provide a huge number of network IDs but
a small number of host IDs.
Before a computer or router can send data, it has to identify the
network ID through the address class. Each class is assigned a
range of numbers.
Address
Class
First octet in dotted
decimal format
begins with
Excluded from Internet,
Allowed for Intranet
A 0 to 127 10.0.0.0 to
10.255.255.255
127.0.0.0 to
127.255.255.255
B 128 to 191 172.16.0.0 to
172.31.255.255
C 192 to 223 192.168.0.0 to
192.168.255.255
Certain IP addresses have particular meanings and are not
assigned to host devices.
• Using zeroes as a host ID signifies the entire network. For
example, the IP address of 192.168.0.0 indicates network
192.168 where specific hosts can be found.
• Using 255 in an octet indicates a broadcast, where data is
sent to all host devices on a network. For example, the IP
Address 192.168.255.255 will broadcast data to all host
devices in that network.
168 Programmer’s Guide

Parker ACR Series Specifications

General

Brand	Parker
Model	ACR Series
Category	Controller
Language	English