Publication 1762-RM001C-EN-P
5-2 Using the High-Speed Counter
High-Speed Counter
(HSC) Function File
Within the RSLogix 500 Function File Folder, you see a HSC Function File.
This file provides access to HSC configuration data, and also allows the
control program access to all information pertaining to each of the
High-Speed Counters.
The HSC function, along with the PTO and PWM instructions, are
different than most other controller instructions. Their operation is
performed by custom circuitry that runs in parallel with the main system
processor. This is necessary because of the high performance
requirements of these functions.
NOTE
If the controller is in the run mode, the data within
sub-element fields may be changing.
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