Hybrid PLC Mechatronics - Chapter 6 Basic Memory Circuits
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Keywords
Memory Circuits, S/R, Set/Reset, Seal, Latch/Unlatch, One Shot, Edge Trigger
Project
Authors
Evans, Wm Ted
Date Submitted
2022
Material Type
Online Course Module
Secondary Material Type
Open Textbook
Institution
University of Toledo
Industry Partner
License
CC BY
Funding Source
Additional Public Access
https://youtu.be/xrS859LacF8
https://hybridplc.org/wp-content/uploads/chap6_S.pdf
https://hybridplc.org/wp-content/uploads/chap6_S.pdf
Abstract
This chapter is useful in the development of logic using memory circuits. The prior chapter was interested in the development of combinational logic. This chapter began the discussion of sequential logic. More on sequential logic will follow.
Writing of Siemens and Allen-Bradley contact and coil instructions is reviewed. A number of instructions were added in the discussion including memory instructions as well as one-shot or edge trigger instructions.
Emphasis was placed on converting from one style of memory circuit to another. For Siemens and most European designers, the S-R logic dominates. In the US, seal circuits are dominant.
Several example problems were introduced using the memory circuit concept. When more than one state is required, then several memory bits must be used to implement the overall logic.
Accompanying Video:
PLC Series Chapter 6 - Basic Memory Circuits
(1:15:10)
Industry (NAISC)
Manufacturing -- Miscellaneous Manufacturing -- Robotics, Mechatronics, and other Miscellaneous Manufacturing (3399)
Occupation (SOC)
Production Occupations (51-0000)
Instructional Program (CIP)
Engineering Technologies/Technicians (15)
Credit Type
Credential Type
Certificate
Educational Level
2nd Year Community College or equivalent
Skill Level
Entry Level
Quality Assurance Organization
OMWP Editorial Board