Rockwell-automation 20G PowerFlex 755 Drive Embedded EtherNet/IP Adapt Manual de usuario descargar pdf (Pagina 180)

180 Rockwell Automation Publication 750COM-UM001E-EN-P - October 2013

Glossary

Idle Action An idle action determines how the adapter and connected drive act when the

controller is switched out of run mode.

I/O Data I/O data, sometimes called ‘implicit messages’ or ‘input/output’, is time-critical

data such as a Logic Command and Reference. The terms ‘input’ (To Net) and

‘output’ (From Net) are defined from the controller’s point of view. Output is

produced by the controller and consumed by the adapter. Input is produced by

the adapter and consumed by the controller.

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 be sure 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 its rotary address

switches, a DHCP or BOOTP server, or by manually configuring parameters in

the adapter. The adapter reads the values of these parameters only at power-up.

Logic Command/Logic Status The Logic Command is used to control the PowerFlex 750-Series drive (for

example, start, stop, and direction). It consists of one 32-bit word of output to the

adapter from the network. The definitions of the bits in this word are shown in

Appendix

The Logic Status is used to monitor the PowerFlex 750-Series drive (for example,

operating state and motor direction). It consists of one 32-bit word of input from

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

0 1 2 7 15 23 31

Class C 1 1 0 Network ID Host ID

1 2 ... 175 176 177 178 179 180 181 182 183 184 185 ... 189 190

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