Allen-Bradley PowerFlex 20-comm-c FRN 1. Series, User Manual

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Glossary-4
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.
M
Master
See scanner.
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.”
Node Addressing
The legal range of ControlNet addresses is 1-99. The ControlNet adapter
includes two rotary switches to allow the ControlNet address to be
set.The ControlNet adapter reads the values of the switches only at
power-up.
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 2000) also use PCCC to communicate.
Ping
A ping is a message that is sent by a DPI 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 Drives
The Allen-Bradley PowerFlex family of drives includes PowerFlex 70,
PowerFlex 700, and PowerFlex 7000 drives. These drives can be used
for applications ranging from 0.37 kW (0.5 HP) to 3,000 kW (4,000 HP).
Most PowerFlex drives implement DPI, allowing them to use the
20-COMM-C ControlNet adapter. This manual focuses on using the
adapter with PowerFlex drives. Other products that implement DPI can
also use the adapter.
20COMM-UM003A-EN-P.book Page 4 Wednesday, November 7, 2001 3:46 PM