Rockwell Automation 20-COMM-B BACnet MS/TP Adapter - Manual (Page 66)

Glossary-4
from the adapter to the network. The definitions of the bits in this word
depend on the drive.
M
MAC Address
Each device on a network must have a unique MAC address to identify
it. On BACnet MS/TP networks, devices can have MAC addresses
between 0 and 127 if the network is set up to accommodate that number
of devices.
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 DriveExecutive) also use PCCC to communicate.
Ping
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 7-Class (Architecture-Class) Drives
The Allen-Bradley PowerFlex 7-Class (Architecture-Class) family of
drives for use on BACnet MS/TP networks include the PowerFlex 70
(standard and enhanced control), PowerFlex 700 (standard and vector
control), PowerFlex 700 Series B (standard and vector control), and
PowerFlex 700H. These drives can be used for applications ranging from
0.37 kW (0.5 HP) to 3,000 kW (4,000 HP).
R
Reference/Feedback
The Reference is used to send a setpoint (for example, speed, frequency,
torque) to the drive. It consists of one word of output to the adapter from
the network. The size of the word (either a 16-bit word or 32-bit word) is
determined by the drive.
Feedback is used to monitor the speed of the drive. It consists of one
word of input from the adapter to the network. The size of the word
(either a 16-bit word or 32-bit word) is determined by the drive.