Industrial Automation, PLC, VFD, and Troubleshooting
An HMI, or Human Machine Interface, is the screen that allows operators and technicians to interact with a machine or process.
A PLC controls the machine, but the HMI gives the …
Read MoreOpening 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 MoreIs It the Sensor, Wiring, PLC Card, Scaling, or HMI?
Analog input troubleshooting is one of the most valuable skills for an automation technician.
When an HMI value looks wrong, unstable, frozen, …
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