Mitsubishi FX2NC PLC Customization
One of the cutting machines that we bought at Regma came with Mitsubishi FX2NC PLC. It was used to interface an encoder and control output relays while providing basic user-interface with a keyboard and LCD screen. However, the program designed for this specific machine did not match our production style.
We decided to re-program it to better suit our needs. Fortunately, it was not locked and easy to program over a serial connection. The program was completely re-designed from scratch and contains support for both Slovenian and English interface. Compared to MCU-based approach with software in C, it was a bit more clumsy designing with ladder-based logic, but at least we did not have to worry about logic level circuitry as PLCs support wide range of input and output voltages and can usually directly drive relays and interface differential encoder signals.
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