Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx - Manual (Page 102)

5-18 Using the I/O
20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-EN-P
Enabling the DeviceNet Scanner
A rung in the ladder logic must be created and assigned to the 1756-DNB
scanner Command Register Run bit. This rung (
Figure 5.12 ) enables the
scanner to transfer I/O on the network.
Figure 5.12 Ladder Logic Rung for Command Register Run Bit
Important: This rung must always be included in the ladder logic program.
Example Datalink Data
The Datalink data used in the example program is shown in Figure 5.13 .
Note that the parameters to which the Datalinks are assigned are descriptive.
Figure 5.13 ControlLogix Example Datalinks for Ladder Logic Program with
Descriptive Controller Tags