Rockwell Automation 22-COMM-E EtherNet/IP Adapter - Manual (Page 156)

G-6 Glossary
L
Logic Command/Logic Status
The Logic Command is used to control the PowerFlex drive (e.g., start,
stop, direction). It consists of one 16-bit word of input to the adapter
from the network. The definitions of the bits in this word depend on the
drive.
The Logic Status is used to monitor the PowerFlex drive (for example,
operating state, motor direction). It consists of one 16-bit word of output
from the adapter to the network. The definitions of the bits in this word
depend on the drive.
N
NVS (Non-Volatile Storage)
NVS is the permanent memory of a device. Devices such as the adapter
and drive store parameters and other information in NVS so that they are
not lost when the device loses power. NVS is sometimes called
“EEPROM.”
P
PCCC (Programmable Controller Communications Command)
PCCC is the protocol used by some controllers to communicate with
devices on a network. Some software products (for example,
DriveExplorer and DriveTools SP) also use PCCC to communicate.
Ping
A ping is a message that is sent by a DSI product to its peripheral
devices. They use the ping to gather data about the product, including
whether it can receive messages and whether they can log in for control.
PowerFlex Component Class Drives
The Allen-Bradley PowerFlex Component Class family of drives include
the PowerFlex 4 and PowerFlex 40. These drives can be used for
applications ranging from 0.2 kW (0.25 HP) to 7.5 kW (10 HP). All
PowerFlex Component Class drives implement DSI, allowing those that
support an internal adapter to use the 22-COMM-E EtherNet/IP adapter.
The adapter can be installed in a PowerFlex 40 drive but not in the
PowerFlex 4.
R
Reference/Feedback
The Reference is used to send a Reference (for example, speed,
frequency, torque) to the drive. It consists of one word of input to the
adapter from the network.
Feedback is used to monitor the speed of the drive. It consists of one
word of output from the adapter to the network.