Explicit messaging examples, Reading (get) data example – Rockwell Automation 1761-NET-DNI DeviceNet Interface (DNI) User Manual

Page 80

Publication 1761-UM005B-EN-P - October 2006

80 Explicit Messaging (DNI Series B Only)

Explicit Messaging
Examples

Once the profiles are correctly loaded into the DNI, getting data from
a DeviceNet device is as simple as reading data from another
controller. The procedure is illustrated by the following examples.

Reading (Get) Data Example

For the DeviceNet network shown above, we want to read data from
the proximity sensor at node 15. The proximity sensor has specific
DeviceNet parameters that are accessible via the DeviceNet network.
In this example, profile register 240 within the DNI (node 10) has
been configured to access specific data within the proximity sensor.

TIP

Devices must be UCMM capable. The proximity
switch and tower light are not UCMM capable. But,
because they are owned by the 1747-SDN scanner in
the SLC chassis, the DNI can explicit message to
them.

TIP

Any devices parameters should be identified in their
respective documents.

Node 5

Node 15

Node 25

Node 30

Node 20

Node 10