Rockwell Automation 20-750-PNET Profinet Single Port Option Module - Manual (Page 88)

88 Rockwell Automation Publication 750COM-UM006A-EN-P - January 2013
Glossary
To ensure that each device on the Profinet network has a unique address, contact
your network administrator or Profinet Service Provider for unique fixed IP
addresses. You can then set the unique IP address for the option module by using
a DHCP server or by manually configuring parameters in the option module.
The option module reads the values of these parameters only at powerup.
Logic Command/Logic Status The Logic Command is used to control the PowerFlex 750-Series drive (for
example, start, stop, and direction). It consists of one 32-bit word of output to the
option module from the network. The definitions of the bits in this word are
shown in
Appendix C .
The Logic Status is used to monitor the PowerFlex 750-Series drive (for example,
operating state and motor direction). It consists of one 32-bit word of input from
the option module to the network. The definitions of the bits in this word are
shown in
Appendix C .
Master-Slave Hierarchy An option module configured for a master-slave hierarchy exchanges data with
the master device. Usually, an automation network has one scanner which is the
master device, and all other devices (for example, drives connected to Profinet
option modules) are slave devices.
On a network with multiple scanners (called a multimaster hierarchy), each slave
device must have a scanner specified as a master.
NVS (Nonvolatile Storage) NVS is the permanent memory of a device. Devices such as the option module
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’.
Option Module Devices such as drives, controllers, and computers usually require a network
communication option module to provide a communication interface between
them and a network such as Profinet. An option module reads data on the
network and transmits it to the connected device. It also reads data in the device
and transmits it to the network.
The 20-750-PNET Profinet Single-port option module connects PowerFlex
750-Series drives to a Profinet network. Option modules are sometimes also
called ‘adapters’, ‘cards’, ‘embedded communication options’, or ‘peripherals’. On
PowerFlex 750-Series drives, option modules can also be I/O modules, encoder
modules, safety modules, and so forth.
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. Pings are used to
gather data about the product, including whether it can receive messages and if
they can log in for control.
PowerFlex 750-Series
(Architecture Class) Drives
Allen-Bradley PowerFlex 750-Series drives are part of the PowerFlex 7-Class
family of drives.