2716D DeviceNet™ Module
The
model 2716D DeviceNet Module adds DeviceNet network support to Control
Technology's automation controllers. DeviceNet is a low-cost, open network
standard that provides for reduced system complexity and significant reductions
in wiring costs. DeviceNet allows different industrial devices such as a CTC
controller and devices from other manufacturers (sensors, actuators, et al.) to
work together on a single network. DeviceNet may also provide communications
links between subsystems or system-level components. The results are improved
control communications between devices and important device-level diagnostics.
The 2716D can be configured as a DeviceNet master, DeviceNet slave, or as
both master and slave on the same network. In master mode, Control Technology's
DeviceNet Configurator software is used to create a network configuration and
load it into the 2716D master residing on a model 2700 series automation
controller. The master module then established links to each device on the
network and maps the device's I/O points and other resources locally for program
access using Quickstep™.
The Configurator also has a monitor mode that identifies and interrogates any
device on a DeviceNet network through the 2716D. This mode is especially useful
when a device's documentation or electronic data sheet (EDS) is not readily
available. Monitor mode can establish links, execute link commands, send and
receive data, and generate a network traffic log.
In slave mode, with the 2716D located in any 2600 or 2700 series automation
controller, the I/O points and other controller resources may be mapped to any
number of commercially available DeviceNet master (or scanner) systems. The
2716D supports Bit-Strobe, Poll, Change-of-State (COS), Cyclic, and Explicit
messaging. All three baud rates are available (125K, 250K, and 500K), and node
selection is available with simple on-board switches.
A Flexible Hardware Architecture
The 2716D DeviceNet module provides two serial communication ports that
support all current CTC protocols. Any of the controller's internal registers,
flags, and other resources may be monitored or changed. Programming is
accomplished with either of the 2716D's serial ports. An additional RS-485 port
is jumper selectable to replace one of the RS-232 ports to provide longer
distance communications. These ports are opto-isolated from the controller's
logic circuitry and from its I/O power system.
Local CPU for Data Handling
The 2716D is equipped with a 32-bit processor, allowing operation of the
DeviceNet network and both serial ports at full rated speed without encumbering
the controller's CPU. Complete messages are assembled locally on the 2716D
module and are then passed to the controller's processor for servicing.
