Publication 1766-RM001A-EN-P - October 2008
100
Using the High-Speed Counter and Programmable Limit Switch
High-Speed Counter
(HSC) Function File
Within the RSLogix 500/RSLogix Micro 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
the High-Speed Counter.
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.
TIP
If the controller is in the run mode, the data within sub-element fields may
be changing.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
