Рет қаралды 71,933
small computers, dedicated to automation tasks in an industrial environment.
Function Block Diagram (FBD)
Sequential Flow Chart (SFC)
Ladder Diagram (LD)
Structured Text (ST)
Instruction List (IL)
Elementary Data Types
Components of a PLC
Inputs
CPU
Memory
Outputs
PLC Inputs and Outputs
Analog, Discrete or Digital
Protected by Optoisolators
Sourcing and Sinking
Communications
PLC Operation
Scanning is the process of running the PLC program
Cycle time is the total time for one loop.
Ladder Logic
Compare a circuits diagram to a ladder logic diagram
Ladder logic uses a variety of programming symbols
Power always flows from left to right
Output devices are in the ON state if power flows through them
Contacts
Contact programmed normally open
Contact programmed normally closed
Follow Us on Social Media
KZbin : / yuvatamiltech
Facebook: / yuvatamiltech
Twitter : / yuvatamiltech
Google Plus : goo.gl/QcxhhZ
Blog: yuvatamiltech.blogspot.com
Website:yuvatamiltech.com