Chapter 14 High-Speed Counter (HSC) instructions
338 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
To configure an HSC interrupt
1. In Interrupt Type, select High-Speed Counter (HSC) User Interrupt.
2. Select the properties:
HSC Interrupt properties on page 338
3. Select the parameters:
HSC Interrupt parameters on page 339.
HSC Interrupt properties
The HSC Interrupt properties status bits indicate the enabled/disabled status, the
execution status, and whether or not the interrupt condition is lost.
User Interrupt Enable (HSC0.Enabled)
Parameter Data format HSC modes User program access
HSCO.Enabled bit 0...9 read only
Enabled bit is used to indicate HSC interrupt enable or disable status.
User Interrupt Executing (HSC0.EX)
Parameter Data format HSC modes User program access
HSCO.Ex bit 0...9 read only
The EX (User Interrupt Executing) bit is set (1) whenever the HSC sub-system
begins processing the HSC subroutine due to any of the following conditions:
• Low preset reached
• High preset reached
• Overflow condition - count up through the overflow value
• Underflow condition - count down through the underflow value
The HSC EX bit can be used in the control program as conditional logic to detect
if an HSC interrupt is executing.
The HSC sub-system will clear (0) the EX bit when the controller completes its
processing of the HSC subroutine.
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