Industrial Automation, PLC, VFD, and Troubleshooting
Opening an unfamiliar PLC program can feel overwhelming.
You may see:
Dozens of routines
Hundreds or thousands of tags
Timers and counters everywhere
Interlocks
Permissives
Fault logic
HMI commands
VFD control
Analog signals
Communication logic
Old logic that nobody remembers
Comments that may …
Read MoreCommissioning is the stage where a PLC control system moves from programmed to proven in the real machine.
A program may look correct offline and still fail during startup because commissioning …
Read MoreThroughout this PLC series, we repeatedly used an important programming concept:
Do not build your entire machine logic directly from physical I/O addresses.
Instead, create a clean separation between the real hardware …
Read MoreIntroduction
In industrial automation, the PLC does not physically “see” the machine, conveyor, door, bottle, box, valve, or actuator. The PLC depends on sensors to know what is happening in the …
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In industrial automation, sensors are one of the most important parts of a control system. A PLC can execute logic, energize outputs, control motors, start conveyors, open valves, and trigger …
Read MoreIntroduction
In industrial automation, sensors provide the feedback that allows a PLC to understand what is happening in the real machine. However, not all sensors send the same type of signal.
Some …
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Selecting the right sensor is not just about choosing a device that can detect something.
In industrial automation, the correct sensor must detect the right condition, at the right time, in …
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Ultrasonic sensors are industrial sensors used to detect distance, presence, or level by using sound waves.
Unlike photoelectric sensors, ultrasonic sensors do not depend on light reflection. This makes them useful …
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In industrial automation, not every feedback signal is a simple ON/OFF input.
Sometimes the PLC or controller needs to know:
How fast is the shaft moving?How far did the conveyor travel?What position …
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Industrial sensors are not installed only to turn a PLC input ON or OFF.
They are installed to give the PLC useful feedback from the real machine.
A sensor can tell the …
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