Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
Using the High-Speed Counter and Programmable Limit Switch 91
The HSC is extremely versatile; the user can select or configure HSC for
any one of eight (8) modes of operation. (Operating Modes are discussed
later in this chapter. See section HSC Mode (MOD) on page 107). Some of
the enhanced capabilities of the High-Speed Counters are:
• 20 kHz (40 kHz
(1)
) operation
• High-speed direct control of outputs
• 32-bit signed integer data (count range of ± 2,147,483,647)
• Programmable High and Low presets, and Overflow and Underflow
setpoints
• Automatic Interrupt processing based on accumulated count
• Run-time editable parameters (from the user control program)
The High-Speed Counter function operates as described in the following
diagram.
(1) OS Series B FRN 4 or later
+2,147,483,647 maximum
-2,147,483,648 minimum
Overflow
High Preset
0
Low Preset
Underflow
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix