Specifications

Glossary
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network cycle time
The time that a master requires to complete a single scan of all of the configured I/O
modules on a network device; typically expressed in microseconds.
NIM
network interface module. This module is the interface between an Island bus and
the fieldbus network of which the Island is a part. A NIM enables all the I/O on the
Island to be treated as a single node on the fieldbus. The NIM also provides 5 V of
logic power to the Advantys STB I/O modules in the same segment as the NIM.
NMT
network management. NMT protocols provide services for network initialization,
diagnostic control, and device status control.
O
object dictionary
Part of the CANopen device model that provides a map to the internal structure of
CANopen devices (according to CANopen profile DS-401). A device’s object
dictionary (also called the object directory) is a lookup table that describes the data
types, communications objects, and application objects the device uses. By
accessing a particular device’s object dictionary through the CANopen fieldbus, you
can predict its network behavior and build a distributed application.
ODVA
Open Devicenet Vendors Association. The ODVA supports the family of network
technologies that are built on the Common Industrial Protocol (EtherNet/IP,
DeviceNet, and CompoNet).
open industrial communication network
A distributed communication network for industrial environments based on open
standards (EN 50235, EN50254, and EN50170, and others) that allows the
exchange of data between devices from different manufacturers.
output filtering
The amount that it takes an output channel to send change-of-state information to
an actuator after the output module has received updated data from the NIM.