Allen-Bradley Micro800 General Instructions Manual page 318

Chapter 14
High-Speed Counter (HSC) instructions
318
UFSetting
Parameter
HSCApp.UFSetting
Underflow setting that defines the lower count limit for the counter.
•
If the counter's accumulated value decrements below the value specified in
UFSetting, an underflow interrupt is generated.
•
When the underflow interrupt is generated, the HSC sub-system resets the
accumulated value to the overflow value and the counter starts counting
from the overflow value (counts are not lost in the transition).
UFSetting values must be:
•
Between -2,147,483,648 and 2,147,483,647.
•
Less than the overflow value.
•
Less than or equal to the data resident in the low preset
(HSCAPP.LPSetting) or an HSC error is generated.
OutputMask
Parameter
HSCApp.OutputMask
Defines the embedded outputs on the controller that the High-Speed Counter
can directly control. The HSC sub-system can, without control program
interaction, turn outputs ON or OFF based on the High or Low presets of the
HSC accumulator.
OutputMask bit patterns
The bit pattern stored in HSCApp.OutputMask defines which outputs are
controlled by the HSC and which outputs are not controlled by the HSC.
The HSCAPP.OutputMask bit pattern corresponds to the output bits on the
controller, and can only be configured during initial setup.
•
Bits that are set (1) are enabled and can be turned on or off by the HSC sub-
system.
•
Bits that are set (0) cannot be turned on or off by the HSC sub-system.
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
Data type User program access
DINT read/write
Data type User program access
UDINT read/write