Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 215)

Using High-Speed Counter Instructions
12–1
12
Using High-Speed Counter
Instructions
This chapter contains general information about the high-speed counter instructions
and explains how they function in your application program. Each of the
instructions includes information on:
•
what the instruction symbol looks like
•
typical execution time for the instruction
•
how to use the instruction
In addition, the last section contains an application example for a paper drilling
machine that shows the high-speed counter instructions in use.
High-Speed Counter Instructions
Instruction
Purpose Page
Mnemonic Name
Purpose Page
HSC High-Speed Counter
Applies configuration to the high-speed
counter hardware, updates the image
accumulator, enables counting when the HSC
is true, and disables counting when the HSC
rung is false.
12–6
HSL
High-Speed Counter
Load Configures the low and high presets, the
output patterns, and mask bit patterns.
12–18
RES
High-Speed Counter
Reset Writes a zero to the hardware accumulator
and image accumulator.
12–21
RAC
High-Speed Counter
Reset Accumulator Writes the value specified to the hardware
accumulator and image accumulator.
12–22
HSE
HSD
High-Speed Counter
Interrupt Enable
High-Speed Counter
Interrupt Disable Enables or disables execution of the
high-speed counter interrupt subroutine when
a high preset, low preset, overflow, or
underflow is reached.
12–23
OTE
Update High-Speed
Counter Image
Accumulator Provides you with real-time access to the
hardware accumulator value by updating the
image accumulator.
12–24
Programming