Rockwell Automation 1761-NET-DNI DeviceNet Interface (DNI) - Manual (Page 81)

Publication 1761-UM005B-EN-P - October 2006
Explicit Messaging (DNI Series B Only) 81
DNI Profile Register 240:
• DeviceNet Node:15
• Class: 14 (0x0E)
• Instance: 1
• Attribute: 1
• Size: 1 byte
To read data from the proximity sensor, a read message is initiated
from the controller to node address 240. The DNI receives the node
240 read request and then generates the appropriate DeviceNet
explicit message to get (read) data from the proximity sensor at
node 15.
In this example, the amount of data (size) being read over DeviceNet
(in bytes) is 1. The DNI receives the byte of information from the
sensor and replies to the controller read request with a word of data.
The actual byte of data from the sensor resides in the low order byte
of the data word within the controller.
In this example, the read message instruction has N7:10 identified as
the data table address, so the sensor data will appear in low order
byte of N7:10. The message instruction setup screen is shown below.
TIP
The profiles size parameter must match the
DeviceNet device.