Allen-Bradley MicroLogix 1400 User Manual

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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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes