Pitch
MagneMover LITE User Manual 471
Rockwell Automation Publication MMI-UM002F-EN-P - October 2022
MSB: Most Significant Byte.
NC: See Node Controller.
Node: A junction that is defined as the beginning, end, or intersection of Paths. The
different node types define their use: Simple, Relay, Terminus, Merge,
Diverge, and so on.
Node Clearance Distance: The position on a path associated with a node where the trailing edge of
a vehicle is considered cleared from the node. See Entry Gate.
Node Controller: The hardware and the application running on that hardware that coordinates
vehicle motions along a path or paths of motors. The node controller is respon-
sible for the motors on all paths that begin at nodes that the node controller is
responsible for.
There can be multiple node controllers in a transport system, each responsible
for a subset of the nodes within the transport system.
Node Controller Configuration File: The XML file unique to the transport system that defines the
basic operating parameters of the transport system. A copy of the Node Con-
troller Configuration File is uploaded to each node controller in the transport
system.
NRTL/ATL: Nationally Recognized Test Lab/Accredited Test Lab.
OSHA recognizes NRTL organizations in accordance with 29 CFR 1910.7 to
test and certify equipment or materials (products).
Accreditation bodies evaluate ATL organizations to ISO/IEC 17025 for testing
and calibration laboratories.
OSSD: Output Signal Switching Device. The interface of a sensor (such as a light cur-
tain) designed for reliably signaling a safety-related event. OSSD signals are
outputs from the protective device to a safety relay.
Path: A designation for one or more motors placed end to end, which defines a linear
route for vehicle travel. A path begins at the Upstream end of the first motor in
the series and ends at the Downstream end of the last motor in the series. All
paths must begin at a Node and the beginning of a path is always the zero posi-
tion for determining positions along that path.
PE: Protective Earth. A conductor that is provided for safety purposes (for exam-
ple, against the risk of electric shock) and which also provides a conductive
path to earth. See also, Ground.
Peer Path: The path that is linked to a Control Path to create a junction. Once linked, this
path remains the Peer Path for the life of the junction until the junction transi-
tions to the unlinked state.
Pitch: The distance between a point on one coil and the corresponding point on an
adjacent coil in the same motor or an adjacent motor. Or, the distance between
a point on one magnet and the corresponding point on an adjacent equivalent
magnet in the same array.
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