Rockwell Automation 2100-GK61 DeviceNet to SCANport - Manual (Page 94)

Publication 2100-UM001B-EN-P – January 2001
6-2 Using DeviceNet Explicit Messaging
• Receive status and diagnostics from these devices on your
DeviceNet network.
• Make runtime adjustments to device parameters according to
changing conditions detected by your processor.
Figure 6.1
How the Explicit Message Program Control Feature Works
1. Format a Block Transfer Write file in the processor to send an
Explicit Message Request to the scanner module (download).
2. The scanner module transmits the Explicit Message Request to
the slave device over the DeviceNet network.
3. The slave device transmits the Explicit Message Response back
to the scanner and is queued into a block transfer buffer.
4. The processor uses a Block Transfer Read file to retrieve the
explicit Message Response from the scanner’s buffer (upload).
5. The Block Transfer Read file is completed. The transaction IDs
are deleted and can be reused.
2100-GK61
Communication Adapter