Allen-Bradley DeviceNet 1761-NET-DNI, User Manual, Page: 89 / 101

1761-6.5
Explicit Messaging (DNI Series B Only) 8-5
Writing (Set) Data Example
In this example we want to write data to the light tower at node 20. The light
tower has specific parameters that are accessible via the DeviceNet network.
In this example, profile register 241 within the DNI (node 10) has been
configured to set data in the light tower:
DNI Profile Register 241:
•
DeviceNet Node:20
•
Class: 9
•
Instance: 1
•
Attribute: 3
•
Size: 1 byte
To set DeviceNet data, a write message is initiated from the controller to
node address 250. The first data word of the write message identifies which
profile register to use (240 to 249). The remaining data words in the
message contain the data that is transmitted to the DeviceNet device, in this
example the light tower.
Node 5
Node 15
Node 25
Node 30
Node 20
Node 10
AB Parts