General Studies · Mechatronics and Control Systems
In an industrial mechatronic system where a microcontroller performs high-speed motor control and a Programmable Logic Controller (PLC) manages overall process sequencing, which of the following communication methods is most suitable for reliable real-time digital data exchange between the two controllers?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Exchanging digital I/O signals through optocouplers without any defined protocol
- 2Connecting both devices directly to a shared memory bus for instantaneous data access
- 3Employing a serial communication protocol such as RS-485 (Modbus RTU) for bidirectional digital data transfer✓
- 4Using analog voltage signals from the PLC's analog output to the microcontroller's ADC input
Correct answer
Employing a serial communication protocol such as RS-485 (Modbus RTU) for bidirectional digital data transfer
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