Omron OMNUC W R88A-NCW152-DRT, Manual

Page: 13 / 292

1 Features and System Configuration
1-2
1
1.1 Features
The R88A-NCW152-DRT DeviceNet Unit can be mounted to an OMNUC W-series Servo
Driver to treat the Servo Driver as a slave in a DeviceNet network, enabling application of the
W-series Servo Drivers as network drivers. Commands received via DeviceNet communications
are output to the Servo Driver. Position commands can be output via a connector to the Servo
Driver to enable positioning without using a positioner.
„ DeviceNet Compatibility
The DeviceNet is an open field network. Mounting a DeviceNet Unit to a W-series Servo
Driver (software version 14 or later) enables constructing a network that includes many dif-
ferent types of slave.
The DeviceNet supports two kinds of communications: Remote I/O communications and
Explicit Message communications. An OMRON DeviceNet Configurator (version 2.2 or
later) can be used to easily set or change parameters via the DeviceNet.
The use of EDS files on the DeviceNet network enables application of slaves from different
vendors without restrictions in a multivendor network. The EDS files contain device ID
information, device parameters, operating information, and other information required to
define the devices.
„ Tracing
Tracing allows the access of collected operating data and I/O information via the DeviceNet
at a specified sampling cycle. Tracing is implemented from a PLC or personal computer
using Explicit Messages to start tracing or read trace data. Tracing thus enables confirming
specified Servo Driver operating status to predict failures in the servo system or troubleshoot
failures that have occurred.
„
Setting Linear and Rotary Axes
The DeviceNet Unit can be set for application as a linear axis or as a rotary axis.
„ Reading Monitor Status
Remote I/O communications can be used to read the signal I/O status or internal information
displayed by the Servo Driver in Monitor Mode to a PLC. This information provides infor-
mation on the operating status of the Servo Driver.
„
Absolute Encoders
OMRON motors with absolute encoders are also supported. Once the origin has been set
after startup, no further origin search operations are required.