Publication 1766-RM001A-EN-P - October 2008
Using the High-Speed Counter and Programmable Limit Switch
121
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
I1:0.0/0 (HSC0)
I1:0.0/1 (HSC0)
I1:0.0/2 (HSC0)
I1:0.0/3 (HSC0)
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
TIP
Inputs I1:0.0/0 through I1:0.0/11 are available for use as inputs to other
functions regardless of the HSC being used.
HSC Mode 5 Examples
Input Terminals
I1:0.0/0 (HSC0)
I1:0.0/1 (HSC0)
I1:0.0/2 (HSC0)
I1:0.0/3 (HSC0)
CE Bit
Comments
Function
Count
Direction
Reset
Hold
Example 1
⇑
on
(1)
⇓
off
(0)
on
(1)
⇓
off
(0)
off
(0)
on (1)
HSC Accum 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 I1:0.0/0 through I1:0.0/11 are available for use as inputs to other
functions regardless of the HSC being used.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive