Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx - Manual (Page 53)

Configuring the I/O 4-11
20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-EN-P
d. Click Edit I/O Parameters… to display the Edit I/O Parameters
screen for the PowerFlex 70 EC drive used in this example.
e. Select the type of data exchange (Polled, Change of State, and/or
Cyclic).
For this example, we selected (and recommend) Polled.
f. For the Input Size and Output Size boxes, use the pull-down menus
to choose the number of bytes that are required for your I/O.
The size will depend on the drive’s Reference/Feedback and the
number of Datalinks used in your I/O (enabled with adapter
Parameter 13 - [DPI I/O Cfg]), and the selected data exchange
method. (A 16-bit word is two bytes, and a 32-bit word is four
bytes.) For this example, an Input Size of ‘20’ and an Output Size
of ‘20’ are used.
Important:Make sure that the bits for Parameters 25 - [M-S
Input] and 26 - [M-S Output] are set to match
Parameter 13 - [DPI I/O Cfg]. See
Setting a
Master-Slave Hierarchy (Scanner-to-Drive
Communication) on page 3-5
for details.
Table 4.A , Table 4.B , or Table 4.C list the number of bytes required
for the Input Size and Output Size boxes for specific I/O
configurations—and only the Polled data exchange method. For
Input Sizes and Output Sizes for other data exchange methods and
specific I/O configurations, see the tables in
Appendix E .