Publication 1763-RM001C-EN-P - October 2009
Using the High-Speed Counter and Programmable Limit Switch
109
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 2 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
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
TIP
Inputs I1:0.0/0 through I1:0.0/3 are available for use as
inputs to other functions regardless of the HSC being
used.
HSC Mode 3 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
⇑
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)
TIP
Inputs I1:0.0/0 through I1:0.0/3 are available for use as
inputs to other functions regardless of the HSC being
used.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive