Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Manual de usuario descargar pdf (Pagina 226)

226 Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013

Glossary

IP Addresses

A unique IP address identifies each node on an EtherNet/IP network. An IP

address consists of 32 bits that are divided into four segments of one byte each. It

appears as four decimal integers separated by periods (xxx.xxx.xxx.xxx). Each

‘xxx’ can have a decimal value from 0 to 255. For example, an IP address could be

192.168.0.1.

An IP address has two parts: a network ID and a host ID. The class of network

determines the format of the address.

The number of devices on your EtherNet/IP network will vary depending on the

number of bytes that are used for the network address. In many cases you are

given a network with a Class C address, in which the first three bytes contain the

network address (subnet mask = 255.255.255.0). This leaves 8 bits or 256

addresses on your network. Because two addresses are reserved for special uses (0

is an address for the network usually used by the router, and 255 is an address for

broadcast messages to all network devices), you have 254 addresses to use on a

Class C address block.

To ensure that each device on the Internet has a unique address, contact your

network administrator or Internet Service Provider for unique fixed IP addresses.

You can then set the unique IP address for the adapter by using a BOOTP server

or by manually configuring parameters in the adapter. The adapter reads the

values of these parameters only at powerup.

L Logic Command/Logic Status

The Logic Command is used to control the PowerFlex 7-Class drive (for example,

start, stop, and direction). It consists of one 16-bit word of output to the adapter

from the network. The definitions of the bits in this word depend on the drive,

and are shown in Appendix

The Logic Status is used to monitor the PowerFlex 7-Class drive (for example,

operating state and motor direction). It consists of one 16-bit word of input from

the adapter to the network. The definitions of the bits in this word depend on the

drive, and are shown in Appendix

01 7 15 23 31

Class A 0 Network ID Host ID

01 7 15 23 31

Class B 1 0 Network ID Host ID

012 7 15 23 31

Class C 110Network ID Host ID

1 2 ... 221 222 223 224 225 226 227 228 229 230 231 ... 237 238

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Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Manual de usuario Pagina 226