Rockwell Automation 2080-L50E-24AWB, User Manual, Page: 207 / 390

Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 207
Chapter 10 Use the High-Speed Counter and Programmable Limit Switch
HSC Mode 6 – Quadrature Counter – Phased Inputs A and B
HSC Mode 7 – Quadrature Counter – Phased Inputs A and B with External Reset and Hold
HSC Mode 8 – Quadrature X4 Counter
Table 49 - HSC Mode 6 Examples
Input Terminals Embedded Input 0 Embedded Input 1 Embedded Input 2 Embedded Input 3 CE Bit Comments
Function Count A Count B Not Used Not Used
Example 1
(1)
 off (0) on (1) HSC Accum 1 count
Example 2
(2)
ß off (0) on (1) HSC Accumulator - 1 count
Example3 off (0) Hold accumulator value
Example 4 on (1) Hold accumulator value
Example 5 on (1) Hold accumulator value
Example 6 off (0) Hold accumulator value
(1) Count input A leads count input B.
(2) Count input B leads count input A.
Blank cells = don’t care,

= rising edge,

= falling edge
Inputs 0…11 are available for use as inputs to other functions regardless of the HSC being used.
Table 50 - HSC Mode 7 Examples
Input Terminals Embedded Input 0 Embedded Input 1 Embedded Input 2 Embedded Input 3 CE Bit Comments
Function Count A Count B Z reset Hold
Example 1
(1) 
off (0) off (0) on (1) HSC Accum 1 count
Example 2
(2)
ß off (0) off (0) off (0) on (1) HSC Accumulator - 1 count
Example3 ß off (0) off (0) on (1) Reset accumulator to zero
Example 4 on (1) Hold accumulator value
Example 5 on (1) Hold accumulator value
Example 6 off (0) on (1) Hold accumulator value
Example 7 off (0) off (0) Hold accumulator value
(1) Count input A leads count input B.
(2) Count input B leads count input A. Blank cells = don’t care,

= rising edge,

= falling edge
Inputs 0…11 are available for use as inputs to other functions regardless of the HSC being used.
Table 51 - HSC Mode 8 Examples
Embedded Input 1(HSC0) (A) Embedded Input 1(HSC0) (B) Value of CE Bit Accumulator and Counter Action
 OFF TRUE Count Up Acc. Value

ON TRUE Count Down Acc. Value
 OFF TRUE Count Down Acc. Value
 ON TRUE Count Up Acc. Value
OFF  TRUE Count Down Acc. Value
ON

TRUE Count Up Acc. Value
OFF  TRUE Count Up Acc. Value
ON

TRUE Count Down Acc. Value
OFF or ON OFF or ON X Hold Acc. Value
X X FALSE Hold Acc. Value