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Friday, October 02, 2020

PLC based PID Controller

Below is a Electrical Control Panel, It has a Strip Chart Recorder which is electro-mechanical, It has a PLC Inside. A handheld PLC Programming unit. The computer is showing the Ladder Logic Program. PLC is based on a embedded uC. The DIN Controllers are Analog + Digital circuits.

Process Control Application Notes

So you see it is a Electrical Control Panel with Electronics and the PLC Ladder Logic means, Software too.

PID Controller PLC

Electrical Control Panel Wiring

This is a PID Controller based Control Panel using a PLC. The Computer is a 386 40MHz with 40MB HDD. The printer Epson dot matrix, The worktable is an inhouse design made of steel and plywood, capable of withstanding heavy loads.

You can also see a Stripchart recorder for the temperature logging and PID curve study. This controls a Steam Valve with 4-20mA output.   

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