Bradley Smoker 1734-AENT manual IP Address, Class

Configure the Adapter for Your EtherNet/IP Network 3-3

IMPORTANT

If using the BootP/DHCP utility, you need to know the Ethernet hardware address of your adapter. Rockwell assigns each 1734-AENT adapter a unique 48-bit hardware address at the factory. The address is printed on a label on the side of your 1734-AENT adapter as shown in the figure. It consists of six hexadecimal digits separated by colons. This address is fixed by the hardware and cannot be changed.

If you change or replace the 1734-AENT adapter, you must enter the new Ethernet hardware address of the adapter when you configure the new adapter.

IP Address

The IP address identifies each node on the IP network (or system of connected networks). Each TCP/IP node on a network (including the 1734-AENT adapter) must have a unique IP address.

The IP address is 32 bits long and has a net ID part and Host ID part. Networks are classified A, B, C, (or other). The class of the network determines how an IP address is formatted.

Class A

Class B

Class C

0	7 8					31
0	Net ID			Host ID
0			15 16			31
1 0	Net ID				Host ID
0			23 24			31
1 1 0		Net ID				Host ID

You can distinguish the class of the IP address from the first integer in its dotted-decimal IP address as follows:

Range of first integer	Class	Range of first integer	Class
0 …127	A	192 … 223	C
128 …191	B	224 … 255	other

Each node on the same physical network must have an IP address of the same class and must have the same net ID. Each node on the same network must have a different Host ID thus giving it a unique IP address.

Publication 1734-UM011C-EN-P - January 2006