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 97: 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

Quickstart Appendix B

Execute the Function Block

Operation Sequence

• A rising edge of FBEN will cause the function block Start initialize steps.

When initialized done, Output Initialized will change to TRUE.

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

becomes TRUE. A rising edge of Start will trigger the feedback process.
Note that if you want to know the positioning information, you need to do
the following to make sure 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

given a rising edge of Stop. To disable the function block, you first need to
set Stop to false.

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

state, the function block will not be reinitialized. Count will resume from
previous accumulator value.