Rockwell Automation RECOMM-IBUS Interbus Communications Module - Manual (Page 115)

Glossary Glossary-3
The Logic Status is used to monitor the SP600 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.
master - see scanner
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 an SP600 drive.
PIDD (Process Input Data Description) - Words used to mapping
input data on the network. Examples of input data include Logic
Status, Feedback, and Datalinks (Datalink x1 Out).
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.
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.
scanner - A separate module (of a multi-module controller) or a
built-in component (of a single-module controller) that provides
communication with modules connected to a network. Also called a
master.
See also controller.
status indicators - LEDs that are used to report the status of the
module, network, and drive. They are on the module and can be
viewed on the front cover of the drive when the drive is powered.
VS Utilities software - A Windows-based software tool for
monitoring and configuring Reliance Electric products and modules.
VS Utilities can be used to configure the Interbus module and
SP600 drives.
zero data - When communications are disrupted (for example, a
cable is disconnected), the module and drive can respond with zero
data. Zero data results in the drive receiving zero as values for
command data. If the drive was running and using the reference
from the module, it will stay running but at zero reference.