Allen-Bradley Micro830

Rockwell Automation Publication 2080-UM002K-EN-E - March 2019 143
Use the High-Speed Counter and Programmable Limit Switch Chapter 8
HSC Mode 4 – Two Input Counter (up and down)
Blank cells = don’t care,  = rising edge,  = falling edge
HSC Mode 5 – Two Input Counter (up and down) with External Reset and
Hold
Blank cells = don’t care,  = rising edge,  = falling edge
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 Accumulator + 1 count
Example 2 on
(1)
 off
(0)
 on (1) HSC Accumulator - 1 count
Example3 off (0) Hold accumulator value
TIP
Inputs 0 through 11 are available for use as inputs to other functions regardless of the HSC being used.
HSC Mode 5 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  on
(1)
 off
(0)
on
(1)
 off
(0)
off
(0)
on (1) HSC Accumulator + 1 count
Example 2 on
(1)
 off
(0)
 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)
TIP
Inputs 0…11 are available for use as inputs to other functions regardless of the HSC being used.