Chapter 14 High-Speed Counter (HSC) instructions
316 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
HSCMode Counting mode
0
Up counter. The accumulator is immediately cleared (0) when it reaches the high preset. A low
preset cannot be defined in this mode.
1
Up counter with external reset and hold. The accumulator is immediately cleared (0) when it reaches
the high preset. A low preset cannot be defined in this mode.
2
Counter with external direction.
3
Counter with external direction, reset and hold.
4
Two input counter (up and down).
5
Two input counter (up and down) with external reset and hold.
6
Quadrature counter (phased inputs A and B).
7
Quadrature counter (phased inputs A and B) with external reset and hold.
8
Quadrature X4 counter (phased inputs A and B).
9
Quadrature X4 counter (phased inputs A and B) with external reset and hold.
For additional information on HSC operating modes and input assignments, see
HSC Inputs and Wiring Mapping in the Micro830 and Micro850 Programmable
Controllers User Manual.
How do I access controller user manuals?
1. In the Help menu, click User Manuals, expand Controllers and then the
controller category.
2. Double-click the controller user manual in the controller category to open a
pdf of the manual.
Accumulator
Parameter Data type User program access
HSCApp.Accumulator DINT read/write
Sets the initial accumulator value when the High-Speed Counter starts. When the
HSC is in Counting mode, the Accumulator is automatically updated by the HSC
sub-system to reflect the actual HSC accumulator value.
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