Industrial Automation, PLC, VFD, and Troubleshooting
A PLC program can be well written, but if the PLC system is poorly installed, the machine can still have problems.
Many PLC issues are not caused by bad ladder logic.
They …
Read MoreIn industrial automation, a PLC panel can have a perfect program and still behave incorrectly if the electrical installation has noise or grounding problems.
Electrical noise can cause problems such as:
Random …
Read MorePLC Communication Basics
Modern PLC systems rarely work alone.
A PLC may communicate with:
HMI panels
VFDs
Remote I/O
Servo drives
Robots
Barcode readers
Vision systems
SCADA computers
Industrial switches
Other PLCs
Data collection systems
In older systems, many signals were hardwired point-to-point.
Example:
PLC output …
Read MoreA PLC system can run for years with very few problems, but that does not mean it should be ignored.
A PLC panel needs preventive maintenance just like motors, gearboxes, sensors, …
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