Allen-Bradley MicroLogix 1200 Reference Manual page 89

Table 5.8 HSC Mode 4 Examples
Input Terminals I1:0.0/0 (HSC0)
I1:0.0/4 (HSC1)
Function Count Up
⇑
Example 1
Example 2 on
(1)
Example3
(1) HSC1 only applies to the MicroLogix 1500.
⇑
Blank cells = don't care, = rising edge,
Table 5.9 HSC Mode 5 Examples
Input Terminals I1:0.0/0 (HSC0)
I1:0.0/4 (HSC1)
Function Count
⇑
Example 1
Example 2 on
(1)
Example3
Example 4
Example 5 on
(1)
Example 6
(1) HSC1 only applies to the MicroLogix 1500.
⇑
Blank cells = don't care, = rising edge,
HSC Mode 4 - Two Input Counter (up and down)
(1)
I1:0.0/1 (HSC0) I1:0.0/2 (HSC0)
I1:0.0/5 (HSC1) I1:0.0/6 (HSC1)
Count Down Not Used
⇓
on off
(1) (0)
⇓ ⇑
off
(0)
⇓
= falling edge
NOTE
HSC Mode 5 - Two Input Counter (up and down) with External Reset and Hold
(1)
I1:0.0/1 (HSC0) I1:0.0/2 (HSC0)
I1:0.0/5 (HSC1) I1:0.0/6 (HSC1)
Direction Reset
⇓
on off
(1) (0)
⇓ ⇑
off
(0)
⇓
off
(0)
⇑
⇓
= falling edge
NOTE
I1:0.0/3 (HSC0)
I1:0.0/7 (HSC1)
Not Used
Inputs I1:0.0/0 through I1:0.0/7 are available for use as
inputs to other functions regardless of the HSC being
used.
I1:0.0/3 (HSC0)
I1:0.0/7 (HSC1)
Hold
⇓ off
on off
(1) (0) (0)
⇓ off
on off
(1) (0) (0)
⇓ off
on on
(1) (0) (1)
⇓ off
on
(1) (0)
⇓ off
on
(1) (0)
Inputs I1:0.0/0 through I1:0.0/7 are available for use as
inputs to other functions regardless of the HSC being
used.
Using the High-Speed Counter
CE Bit Comments
on (1) HSC Accumulator + 1 count
on (1) HSC Accumulator - 1 count
off (0) Hold accumulator value
CE Bit Comments
on (1) HSC Accumulator + 1 count
on (1) HSC Accumulator - 1 count
Hold accumulator value
off (0) Hold accumulator value
Hold accumulator value
Clear accumulator (=0)
Publication 1762-RM001C-EN-P
5-19