132 Rockwell Automation Publication 2080-UM002K-EN-E - March 2019
Chapter 7 Motion Control
HSC Feedback Axis
From Connected Components Workbench Release 8.0 onwards, support has
been added for a HSC (High Speed Counter) Feedback Axis which uses the same
instructions as the PTO Motion Axis. UDFBs are still supported (you can use
either one but you cannot select both for the same plug-in).
Example of Selecting Feedback Axis or UDFB with 2080-MOT-HSC Plug-in
The HSC Feedback Axis provides ease-of-use as you no longer need to program
the function blocks, and it also uses up less memory on the controller. The HSC
Feedback Axis uses only the administrative function blocks from the PTO
Motion Axis and they share the same Axis Monitor.
The counters are not reset to zero for program download. For example, if
using the feedback axis, use the MC_ResetPosition function block to
reset the position to zero.
If the feedback axis is in the error state because the configured position
limits have been exceeded, using the MC_Reset function block to reset
the axis may not clear the error as there may still be pulse detected from
the encoder.
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