G-4
Glossary
PowerFlex® 755 Drive Embedded EtherNet/IP Adapter User Manual
Publication 750COM-UM001A-EN-P
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 utility.
HIM (Human Interface Module)
A device that can be used to configure and control a drive. Enhanced
PowerFlex 7-Class HIMs (for example, 20-HIM-A6) can be used to
configure PowerFlex 750-Series 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.
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
0 1
7
15
23
31
Class A 0 Network ID
Host ID
0 1
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
