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Rockwell Automation Publication 2080-UM002L-EN-E - November 2021
Chapter 8 Use the High-Speed Counter and Programmable Limit Switch
Blank cells = don’t care,
= rising edge,
= falling edge
HSC Mode 2 – Counter with External Direction
Blank cells = don’t care,
= rising edge,
= falling edge
HSC Mode 3 – Counter with External Direction, Reset, and Hold
Blank cells = don’t care,
= rising edge,
= falling edge
HSC Mode 4 – Two Input Counter (up and down)
Blank cells = don’t care,
= rising edge,
= falling edge
Example 2
on (1)
off (0)
on (1)
Hold accumulator value
Example3
on (1)
off (0)
off (0)
Hold accumulator value
Example 4
on (1)
off (0)
on (1)
off (0)
Hold accumulator value
Example 5
Clear accumulator (=0)
Table 24 - HSC Mode 1 Examples (Continued)
Input Terminals
Embedded Input 0
Embedded Input 1 Embedded Input 2
Embedded Input 3
CE Bit
Comments
Inputs 0…11 are available for use as inputs to other functions regardless
of the HSC being used.
Table 25 - HSC Mode 2 Examples
Input Terminals
Embedded Input 0 Embedded Input 1
Embedded Input 2 Embedded Input 3 CE Bit
Comments
Function
Count
Direction
Not Used
Not Used
Example 1
off (0)
on (1)
HSC Accum 1 count
Example 2
on (1)
on (1)
HSC Accumulator - 1 count
Example3
off (0)
Hold accumulator value
Inputs 0…11 are available for use as inputs to other functions regardless
of the HSC being used.
Table 26 - HSC Mode 3 Examples
Input Terminals
Embedded Input 0
Embedded Input 1
Embedded Input 2
Embedded Input 3
CE Bit
Comments
Function
Count
Direction
Reset
Hold
Example 1
off (0)
on (1)
off (0)
off (0) on (1)
HSC Accum 1 count
Example 2
on (1)
on (1)
off (0)
off (0) on (1)
HSC Accumulator - 1 count
Example3
on (1)
off (0)
on (1)
Hold accumulator value
Example 4
on (1)
off (0)
off (0)
Hold accumulator value
Example 5
on (1)
off (0)
on (1)
off (0)
Hold accumulator value
Example 6
Clear accumulator (=0)
Inputs 0…11 are available for use as inputs to other functions regardless
of the HSC being used.
Table 27 - HSC Mode 4 Examples
Input Terminals
Embedded Input 0
Embedded Input 1
Embedded Input 2 Embedded Input 3 CE Bit
Comments
Function
Count Up
Count Down
Not Used
Not Used
Example 1
on (1)
off (0)
on (1)
HSC Accum 1 count
Example 2
on (1)
off (0)
on (1)
HSC Accumulator - 1 count
Example3
off (0)
Hold accumulator value
Inputs 0 through 11 are available for use as inputs to other functions regardless of the HSC being used.
