Rockwell Automation 20-COMM-Q ControlNet Adapter User Manual
Page 259
Glossary
G-5
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
The Logic Status is used to monitor the PowerFlex 7-Class drive (for
example, operating state and 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, and are shown in
.
M
Master-Slave Hierarchy
An adapter configured for a master-slave hierarchy exchanges data with the
master device. Usually, a network has one scanner which is the master
device, and all other devices (for example, drives connected to ControlNet
adapters) are slave devices.
On a network with multiple scanners (called a multimaster hierarchy), each
slave device must have a scanner specified as a master.
N
Node Address
A unique address that identifies each node on a ControlNet network. The
valid range of ControlNet addresses is 1…99. The ControlNet adapter uses
two rotary switches to set the ControlNet address or, when the switches are
set to ‘00’, uses a parameter to set the node address. The adapter reads the
values of the switches only at power-up.
NVS (Nonvolatile 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 software) 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 family of drives supports DPI and, at
the time of publication, includes the PowerFlex 70, PowerFlex 700,
PowerFlex 700H, PowerFlex 700S, PowerFlex 700L, and PowerFlex 7000
drives.
PowerFlex 750-Series (Architecture Class) Drives
The Allen-Bradley PowerFlex 750-Series of drives supports DPI and, at the
time of publication, includes the PowerFlex 753 and PowerFlex 755 drives.