Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx - Manual (Page 99)

Using the I/O 5-15
20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-EN-P
Figure 5.6 ControlLogix Example Ladder Logic Program with Non-descriptive
Controller Tags for Logic Command/Reference
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 5.7 ) enables the
scanner to transfer I/O on the network.
Figure 5.7 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 5.8 . Note
that to describe the parameters to which the Datalinks are assigned, you
may want to add descriptions to the automatically-created generic controller
tags or create a User Defined Data Types (UDDT).