Rockwell Automation MD65 EtherNet/IP Communication Module - Manual (Page 170)

Glossary-4 EtherNet/IP Communications Module
Logic Command/Logic Status - The Logic Command is used to
control the MD65 drive (e.g., start, stop, direction). It consists of one
16-bit word of input to the module from the network. The definitions
of the bits in this word depend on the drive.
The Logic Status is used to monitor the MD65 drive (for example,
operating state, motor direction). It consists of one 16-bit word of
output from the module to the network. The definitions of the bits in
this word depend on the drive.
MDI peripheral - A device that provides an interface between MDI
and a network or user. Peripheral devices are also referred to as
“modules” and “adapters.” The EtherNet/IP module and MD65 OIM
are examples of MDI peripherals.
MDI product - A device that uses the MDI communications
interface to communicate with one or more peripheral devices. For
example, a motor drive such as a MD65 drive is a MDI product. In
this manual, a MDI product is also referred to as “product” or “host.”
module - Devices such as drives, controllers, and computers
usually require an module to provide a communication interface
between them and a network such as EtherNet/IP. An 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 RECOMM-ENET EtherNet/IP module is a module that
connects MD65 drives to a Ethernet network. Modules are
sometimes also called “adapters,” “cards,” “embedded
communication options,” “gateways,” and “peripherals.”
non-volatile storage (NVS) - NVS is the permanent memory of a
device. Devices such as the 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.”
operator interface module (OIM) - A device that can be used to
configure and control a MD65 drive.
PCCC (Programmable Controller Communications Command) -
The protocol used by some controllers to communicate with devices
on a network. Some software products (for example, VS Utilities)
also use PCCC to communicate.
reference/feedback - The reference is used to send a reference
(for example, speed, frequency, torque) to the product. It consists of
one word of input to the module 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 a product. It consists of
one word of output from the module to the network. The size of the
word (either a 16-bit word or 32-bit word) is determined by the drive.