Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Uživatelský manuál stáhnout pdf (Strana 225)

Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013 225

Glossary

configuration data and a fault occurs, the data from these parameters is sent as the

Logic Command, Reference, and/or Datalinks.

G Gateway

A device on a network that connects an individual network to a system of

networks. When a node needs to communicate with a node on another network,

a gateway transfers the data between the two networks. You need to configure the

address for the gateway device in the adapter if you want the adapter to

communicate with devices that are not on its network.

H Hardware Address

Each Ethernet device has a unique hardware address (sometimes called a MAC

address) that is 48 bits. The address appears as six digits separated by colons (for

example, xx:xx:xx:xx:xx:xx). Each digit has a value between 0 and 255 (0x00 and

0xFF). This address is assigned in the hardware and cannot be changed. It is

required to identify the device if you are using a BOOTP server.

HIM (Human Interface Module)

A device that can be used to configure and control a drive. PowerFlex 7-Class

HIMs (catalog number 20-HIM-xx) can be used to configure PowerFlex 7-Class

drives and their connected peripherals.

Hold Last

When communication is disrupted (for example, a cable is disconnected), the

adapter and PowerFlex drive can respond by holding last. Hold last results in the

drive receiving the last data received via the network connection before the

disruption. If the drive was running and using the Reference from the adapter, it

will continue to run at the same Reference.

I 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’ and ‘output’ 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.

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Rockwell-automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Commun Uživatelský manuál Strana 225