Execute the function block, Operation sequence, A. initialize the ra_fdbkaxis function block – Rockwell Automation 2080 Micro800 Digital and Analog Plug-in Modules User Manual

Page 100: B. home the pto axis to be monitored, C. once home is done, start the feedback process

Rockwell Automation Publication 2080-UM004B-EN-E - December 2013

Appendix B Quickstart

Execute the Function Block

Operation Sequence

• A rising edge of FBEN causes the function block to start initializing steps.

When Initialized is done, Output Initialized changes to TRUE.

• You can start the feedback process (Start counting) after Initialized is

TRUE. A rising edge of Start will trigger the feedback process.
Please note that if you want to get positioning information, you need to do
following steps to ensure that position information is in sync:
a. Initialize the RA_FDBKAxis function block.
b. Home the PTO axis to be monitored.
c. Once home is done, start the feedback process.

• You can stop/pause the process and clear the MaxDPos and MaxDSpd by

giving a rising edge of Stop. If you want to disable the function block, you
need set it to Stop state first.

• If FBEN is True and you start the feedback process from previous Stop

state, the function block will not be re-initialized. It will resume count
from previous accumulator value.