Electrical basics - PLC Programming & Automation

PLC Motor Control VFD Setup: DOL, PowerFlex 525, G120

September 13, 2026February 11, 2024 by PLC

Ladder rung: Start in parallel with the Run_Cmd seal-in contact, in series with a normally closed Stop and a Drive_Ready contact, driving the Run_Cmd output

Choose DOL or a drive, wire the stop so it works without the PLC, set the drive parameters and tags, then read the fault codes when it trips.

PLC I/O Modules: Sinking, Sourcing, Keying, Scaling

September 13, 2026January 30, 2024 by PLC

Timing chart of a 24V DC input: the field sensor edge, the module input filter delay, and the controller tag updating at the next RPI

How to pick discrete and analog I/O, get sinking and sourcing right, set RPI and electronic keying, wire a 4-20 mA loop and scale the raw counts.

PLC Predictive Maintenance: Vibration, Current, Hours

September 13, 2026January 30, 2024 by PLC

Timing chart of condition monitoring sampling: the machine starts, a warm-up delay blocks sampling, one-second sample pulses run only while warmed up, and the level 1 alert sets after the average crosses the limit

Build PLC predictive maintenance on hardware you own: vibration and motor current inputs, runtime hours, moving averages, baselines and alarm levels.

PLC Power Generation: Permissives, Sync and Load Shed

September 13, 2026January 20, 2024 by PLC

Ladder rung for a generator start permissive: start push button sealed in, lube oil pressure healthy, generator breaker open, lockout relay reset, driving the start sequence coil

Where the PLC stops and the relay starts, a generator start permissive rung, the synchronising handshake, load shed stages and switchgear interlocks.

RSLogix PLC Programming Motor Start/Stop program

July 23, 2020July 8, 2020 by Admin

RSLogix 5000 PLC programming on example. Motor start/stop via single button automation executing on RSLogix PLC. Learn plc programming .

Siemens PLC Drive Motor Start Stop

September 13, 2026June 27, 2020 by Admin

Step-by-step TIA Portal example wiring start and stop buttons to a TON timer and output coil, then downloading and simulating the motor logic.

Electric Motors

September 13, 2026June 25, 2020 by Admin

Explains DC and AC electric motor construction and types, including series, shunt, and compound DC motors, and single- vs three-phase AC motors.

Star-Delta Motor Starting Mathematical Expansion

September 13, 2026June 25, 2020 by Admin

Explains why asynchronous motors use star-delta starting to cut inrush current about 30% and starting torque about 25%, and when it will not work.

Motor Start/Stop via Timer

July 22, 2020June 25, 2020 by Admin

PLC Motor Start Stop with timer, how you can start motor with button on plc, plc ladder programming and tutorial, You can start to engine and stop the engine

What is Encoder? Usage Areas and Types

September 13, 2026June 24, 2020 by Admin

plc programming motor rotary optical encoder 500x500 1 plc

Explains how encoders generate position and speed feedback, the difference between absolute and incremental types, and what to check when selecting one.