Rockwell Automation Motion Control PTO Application Building Block - Manual (Page 36)

36 Rockwell Automation Publication CC-QS033A-EN-P - February 2014
Chapter 2 System Validation
Configure Input Filter for High Speed Counter
The default input filter value can be adjusted to count the high-speed pulses from your encoder.
Follow these steps to change the input terminal filter value for your encoder input.
1. Identify the input terminal with reference to the High Speed Counter (HSC) selected for your application.
Each HSC ID corresponds to a set of input terminals.
2. From the Controller Organizer, select Embedded I/O.
3. Choose the input filter value for your input terminal identified in step 1 .
The default is 8 ms.
Set the input filter value to less than the minimum for you application. You can calculate the minimum requirement by
using this formula:
Minimum input filter (seconds) = 1/ (max revolution per second * encoder resolution per revolution)
High Speed Counter Inputs Used
HSC0 0…3
HSC1 2,3
HSC2 4…7
HSC3 6, 7
HSC4 8…11
HSC5 10, 11