How it works
A simple and effective solution:
- The original stepwise throttle input (“thumbwheel”) of the Caterpillar-based excavator was read via CAN J1939
- For each step, the MRS module generated the corresponding 4-20 mA signal
- The electric motor was precisely controlled through the frequency inverter, successfully replacing the diesel engine
Division of labour
While the MOBA control units managed the overall system, the MRS Micro PLC stepped in at a critical turning point with a compact yet vital solution, becoming the unsung hero of this electrification journey.



