Rockwell Automation 2100-GK61 DeviceNet to SCANport - Manual (Page 102)

Publication 2100-UM001B-EN-P – January 2001
6-10 Using DeviceNet Explicit Messaging
Explicit Messaging
Programming Example The example below illustrates how to read 2100-GK61 inputs and
control the outputs of an SMP-3 electronic overload relay using
explicit messaging.
Example Ladder Program
Explanation • Rung 0 – N10:0/0 enables 1771-SDN Scanner Port A.
• Rung 1 - BTR (Block Transfer Read) gathers SMP-3 Status Data
via DeviceNet. The Block Transfer then moves the status data
from the scanner to the PLC’s N9 data file.
• Rung 2 – BTW (Block Transfer Write) sends SMP-3 command
data to the scanner and out to the SMP-3 via DeviceNet.
• Rung 3 – Turns off SMP-3 Output A (by momentarily turning on
I:001 / 0).
• Rung 4 – Turns off SMP-3 Output B (by momentarily turning on
I:001 / 1).
• Rung 5 – Clears SMP-3 Fault (by momentarily turning on
I:001 / 2).
Figure 6.4