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Integrate NI-DNET Interface into a PLC-based DeviceNet Network

Hardware: Industrial Communications>>DeviceNet

Problem:
I have a DeviceNet network with the Allen-Bradley PLC as the DeviceNet master. I use RSLinx, RSNetworx and RSLogix to configure the DeviceNet devices. How can I integrate a National Instruments PXI system into my existing network?

Solution:
You can integrate a National Instruments PXI system into your DeviceNet network in the following steps:
  1. Make the NI-DNET interface work as a DeviceNet slave. The NI interface usually works as a DeviceNet master. You can set the interface to slave mode by setting the DeviceMacId parameter in ncOpenDnetIO (Open DeviceNet IO.vi) as IntfMacId for ncOpenDnetIntf (Open DeviceNet Interface.vi). You can use the attached Slave Device.vi.
  2. Import the Electronic Data Sheet (EDS) file for the NI-DNET interface. The DeviceNet network configuration tool, like RSNetworx, needs to import the attached EDS file to identify a slave device. The steps to import an EDS file in RSNetworx are:
    1. Click the menu Tools»EDS Wizard... to open Rockwell Software's EDS Wizard.
    2. Select Register an EDS file and click Next.
    3. Select Register a single file, click Browse... to specify the EDS file, and then click Next.
  3. Browse and configure the slave in RSNetworx.
    1. If RSNetworx is offline, click the menu Network»Online to go online.
    2. Click the menu Network»Single Pass Browse to browse the network. Then you can see the slave "NI-DNET Interface". (Make sure the slave VI or application in step 1 is running).
    3. Right click the slave device node and click the menu Properties... to configure the slave and map the I/O into the PLC memory.
  4. Connect the signals to the DeviceNet slave In the slave VI or application, you can use ncReadDnetIO (Read DeviceNet I/O.vi) to receive the signals from the PLC and use ncWriteDnetIO (Write DeviceNet I/O.vi) to send the signals to the PLC.
A LabVIEW example of a Slave Device.vi and the EDS file for NI-DNET 1.5 can be found in the Attachments section below. The document is suitable for NI-DNET 1.5 and above.

Related Links:
Products & Services: DeviceNet Interfaces

 



Attachments:


Slave Device.viNidnet1.5.eds

Report Date: 05/19/2006
Last Updated: 03/15/2009
Document ID: 3XI8G2BV

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