Rockwell Automation 2080-LC50 Micro830 and Micro850 Programmable Controllers User Manual - Manual (Page 127)

Rockwell Automation Publication 2080-UM002F-EN-E - December 2013 111
Chapter
8
Use the High-Speed Counter and
Programmable Limit Switch
High-Speed Counter
Overview All Micro830 and Micro850 controllers, except for 2080-LCxx-AWB, support
up to six high speed counters (HSC). The HSC feature in Micro800 consists of
two main components: the high-speed counter hardware (embedded inputs in
the controller), and high-speed counter instructions in the application program.
High-speed counter instructions apply configuration to the high-speed counter
hardware and updates the accumulator.
This chapter describes how to use the HSC function and also contains sections
on the HSC and HSC_ SET_STS function blocks, as follows:
• High Speed Counter (HSC) Data Structures
• HSC (High Speed Counter) Function Block
• HSC_SET_STS Function Block
• Programmable Limit Switch (PLS) Function
• HSC Interrupts
Programmable Limit Switch
Overview The Programmable Limit Switch function allows you to configure the
High-Speed Counter to operate as a PLS (Programmable Limit Switch) or rotary
cam switch. For more information, see
Programmable Limit Switch (PLS)
Function on page 137 .
ATTENTION: To use the Micro800 HSC feature effectively, you need to
have a basic understanding of the following:
•
HSC components and data elements.
The first sections of the chapter provides a detailed description of these
components. Quickstart instructions (see page 181) are also available to
guide you through setting up a sample HSC project.
•
Programming and working with elements in Connected Components
Workbench.
The user needs to have a working knowledge of programming through
ladder diagram, structured text, or function block diagram to be able to
work with the HSC function block and variables.
ATTENTION: Additional information is available on the HSC function
block and its elements in the Connected Components Workbench
Online Help that comes with your Connected Components Workbench
installation.