Rockwell Automation Publication 2080-UM002M-EN-E - April 2022 199
Chapter 9 Use the High-Speed Counter and Programmable Limit Switch
This bit is updated continuously by the HSC sub-system whenever the
controller is in a run mode.
The High Preset Reached status flag is set (1) by the HSC sub-system whenever
the accumulated value (HSCSTS.Accumulator) is greater than or equal to the
high preset variable (HSCAPP.HPSetting).
This bit is updated continuously by the HSC sub-system whenever the
controller is in an executing mode. Writing to this element is not
recommended.
The Low Preset Reached status flag is set (1) by the HSC sub-system whenever
the accumulated value (HSCSTS.Accumulator is less than or equal to the low
preset variable HSCAPP.LPSetting).
This bit is updated continuously by the HSC sub-system whenever the
controller is in an executing mode. Writing to this element is not
recommended.
The Overflow Interrupt status bit is set (1) when the HSC accumulator counts
through the overflow value and the HSC interrupt is triggered. This bit can be
used in the control program to identify that the overflow variable caused the
HSC interrupt. If the control program needs to perform any specific control
action based on the overflow, this bit is used as conditional logic.
This bit can be cleared (0) by the control program and is also cleared by the
HSC sub-system whenever these conditions are detected:
• Low Preset Interrupt executes
• High Preset Interrupt executes
• Underflow Interrupt executes
The Underflow Interrupt status bit is set (1) when the HSC accumulator counts
through the underflow value and the HSC interrupt is triggered. This bit can
High Preset Reached (HSCSTS.HPReached)
Description Data Format
HSC Modes
(1)
(1) For Mode descriptions, see Count Down (HSCSTS.CountDownFlag) on page 197.
User Program Access
HSCSTS.HPReached bit 2…9 read/write
Low Preset Reached (HSCSTS.LPReached)
Description Data Format
HSC Modes
(1)
(1) For Mode descriptions, see HSC Mode (HSCAPP.HSCMode) on page 189.
User Program Access
HSCSTS.LPReached) bit 2…9 read only
Overflow Interrupt (HSCSTS.OFCauseInter)
Description Data Format
HSC Modes
(1)
(1) For Mode descriptions, see HSC Mode (HSCAPP.HSCMode) on page 189.
User Program Access
HSCSTS.OFCauseInter bit 0…9 read/write
Underflow Interrupt (HSCSTS.UFCauseInter)
Description Data Format
HSC Modes
(1)
(1) For Mode descriptions, see HSC Mode (HSCAPP.HSCMode) on page 189.
User Program Access
HSCSTS.UFCauseInter bit 2…9 read/write
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