User manual

Publication 1747-IN011F-EN-P - May 2007
238 Control Networks
A single scanner (master) can communicate with up to 63 nodes
(slaves) on DeviceNet. The SLC system supports multiple scanners if
more devices are required to be controlled by a single SLC 500
processor.
DeviceNet Network
The 1761-NET-DNI DeviceNet Interface
The DeviceNet Interface (DNI) is an intelligent DeviceNet-to-DF1
protocol conversion device that let existing DF1 devices communicate
on DeviceNet network. The DF1 device is able to exchange I/O data
with a master device and is able to initiate and receive DF1
encapsulated DeviceNet messages across a DeviceNet network.
The DNI provides a single DeviceNet connection point and a single
RS-232 connection. The DeviceNet port is isolated from the DNI
digital logic and RS-232 port.
The primary functions of the DNI are:
• to collect and receive input data from the DF1 device connected
on its RS-232 port and forward that data to a connected master
on a DeviceNet network.
• to monitor output data received from the DeviceNet master and
write that data to the DF1 device.
• to let DF1 devices send and receive messages across the
DeviceNet network.
The DNI can be used to interconnect:
• MicroLogix controllers.
SLC 5/02 or later
processor
1747-SDN Scanner
1770-KFD Interface
Personal
Computer with
RSNetworx for
DeviceNet
Software
RS-232
cable
DeviceNet
Devices
RediSTATION
Panel
1305 Drive
Flex I/O Controller
DeviceNet Network