Rockwell Automation 22-COMM-C ControlNet Adapter User Manual
Page 154
G-4
Glossary
terms “input” and “output” are defined from the scanner’s point of view.
Output is produced by the scanner and consumed by the adapter. Input is
produced by the adapter and consumed by the scanner.
L
Logic Command/Logic Status
The Logic Command is used to control the PowerFlex drive (for
example, start, stop, direction). It consists of one 16-bit word of output 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 input
from the adapter to the network. The definitions of the bits in this word
depend on the drive.
N
Node Address
The valid range of ControlNet addresses is 1-99. The 22-COMM-C
adapter includes two rotary switches to allow the ControlNet address to
be set. The adapter reads the values of the switches only at power-up.
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 Commands)
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.
PowerFlex 4-Class (Component-Class) Drives
The Allen-Bradley PowerFlex 4-Class (Component-Class) family of
drives include the PowerFlex 4, PowerFlex 40, and PowerFlex 400.
These drives can be used for applications ranging from 0.2 kW (0.25
HP) to 7.5 kW (10 HP).
R
Reference/Feedback
The Reference is used to send a setpoint (for example, speed, frequency,
torque) to the drive. It consists of one 16-bit word of output to the
adapter from the network.
Feedback is used to monitor the speed of the drive. It consists of one
16-bit word of input from the adapter to the network.