Allen-Bradley MicroLogix 1200 Reference Manual

1 Publication 1762-RM001C-EN-P
Chapter 5
Using the High-Speed Counter
The MicroLogix 1200 has one 20 kHz high-speed counter; the MicroLogix
1500 has two. Functionally, the counters are identical. Each counter has
four dedicated inputs that are isolated from other inputs on the controller.
HSC0 utilizes inputs 0 through 3 and HSC1 (MicroLogix 1500 only) utilizes
inputs 4 through 7. Each counter operates independently from the other.
This chapter describes how to use the HSC function and also contains
sections on the HSL and RAC instructions, as follows:
•
High-Speed Counter (HSC) Function File on page 5-2.
•
HSL - High-Speed Counter Load on page 5-26.
•
RAC - Reset Accumulated Value on page 5-27.
NOTE
HSC0 is used in this document to define how any HSC
works. The MicroLogix 1500’s HSC1 is identical in
functionality.
IMPORTANT
The HSC function can only be used with the controller’s
embedded I/O. It cannot be used with expansion I/O
modules.

Allen-Bradley MicroLogix 1200 Specifications

General

Series	MicroLogix 1200
Type	Programmable Logic Controller (PLC)
Mounting	DIN rail or panel mount
Programming Language	Ladder Logic
Programming Software	RSLogix 500
I/O Points	Up to 40
Communication Ports	RS-232, RS-485
Memory	6 KB user memory
Power Supply	24V DC or 120/240V AC
Expansion	Supports expansion I/O modules
Operating Temperature	0°C to 55°C (32°F to 131°F)
Dimensions	90 mm x 110 mm
Weight	0.5 kg (1.1 lbs)