Basics - Ip Address And Subnet - YASKAWA SPEED7 300S+ CPU 315PN Manual

Deployment Ethernet communication - productive

Basics - IP address and subnet

8.5 Basics - IP address and subnet
IP address structure
Net-ID, Host-ID
Subnet mask
Address at first start-up
Address classes
Private IP networks
106
Exclusively IPv4 is supported. At IPv4 the IP address is a 32bit address that must be
unique within the network and consists of 4 numbers that are separated by a dot. Every
IP address is a combination of a Net-ID and a Host-ID and has the following
Structure: xxx.xxx.xxx.xxx
Range: 000.000.000.000 to 255.255.255.255
The Network-ID identifies a network res. a network controller that administrates the net-
work. The Host-ID marks the network connections of a participant (host) to this network.
The Host-ID can be further divided into a Subnet-ID and a new Host-ID by using a bit for
bit AND assignment with the Subnet mask.
The area of the original Host-ID that is overwritten by 1 of the Subnet mask becomes the
Subnet-ID, the rest is the new Host-ID.
Subnet mask
IPv4 address
Subnet mask and IPv4 address
At the first start-up of the CPU, the Ethernet PG/OP channel and the PROFINET IO con-
troller do not have an IP address.
Information about the assignment of IP address data to the Ethernet PG/OP channel may
be found in Ä Chap. 5.6 'Hardware configuration - Ethernet PG/OP channel' page 42.
Information about the assignment of IP address data to the EtherCAT connection may be
Ä 'Assign IP address parameters' page 126
found in
For IPv4 addresses there are five address formats (class A to class E) that are all of a
length of 4byte = 32bit.
Class A 0 Network-ID (1+7bit)
Class B 10
Class C 110
Class D 1110
Class E 11110
The classes A, B and C are used for individual addresses, class D for multicast
addresses and class E is reserved for special purposes. The address formats of the 3
classes A, B, C are only differing in the length of Network-ID and Host-ID.
These addresses can be used as net-ID by several organizations without causing con-
flicts, for these IP addresses are neither assigned in the Internet nor are routed in the
Internet. To build up private IP-Networks within the Internet, RFC1597/1918 reserves the
following address areas:
binary all "1"
Net-ID
Net-ID
Network-ID (2+14bit)
Network-ID (3+21bit)
Multicast group
Reserved
System 300S
binary all "0"
Host-ID
Subnet-ID new Host-ID
Host-ID (24bit)
Host-ID (16bit)
Host-ID (8bit)
HB140 | CPU | 315-4PN23 | en | 18-02
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