Allen-Bradley MicroLogix 1400 - Page 126

Publication 1766-RM001A-EN-P - October 2008
124 Using the High-Speed Counter and Programmable Limit Switch
HSC Mode 9 - Quadrature X4 Counter with External Reset and Hold
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
HSC Mode 8 Examples
I1:0.0/1(HSC0)
(A)
I1:0.0/1(HSC0)
(B)
Value of CE Bit Accumulator and Counter Action
HSC Mode 9 Examples
I1:0.0/0(HSC0)
(A))
I1:0.0/1(HSC0)
(B)
I1:0.0/2(HSC0)
(Reset)
I1:0.0/3(HSC0)
(Hold)
Value of CE Bit Accumulator and Counter Action
▲ OFF X - TRUE Count Up Acc. Value
▲ ON X - TRUE Count Down Acc. Value
▼ OFF X - TRUE Count Down Acc. Value
▼ ON X - TRUE Count Up Acc. Value
OFF ▲ X - TRUE Count Down Acc. Value
ON ▲ X - TRUE Count Up Acc. Value
OFF ▼ X - TRUE Count Up Acc. Value
ON ▼ X - TRUE Count Down Acc. Value
OFF or ON OFF or ON OFF X X Hold Acc. Value
OFF OFF ON X X Reset Acc. to Zero
X X OFF ON X Hold Acc. Value
X X OFF X FALSE Hold Acc. Value
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