IO functionality

What type of signals do digital input modules receive from external devices?

• Discrete signals

• Analog signals

• Binary signals

• Continuous signals

How does the PLC interpret the binary signals received from digital input modules?

• As analog signals

• As high or low voltage

• As ON or OFF states

• As positive or negative values

What determines the appropriate state (ON or OFF) for digital output modules?

• Input conditions

• Output conditions

• Voltage levels

• Frequency of signals

In the example scenario, what do the digital input sensors along the conveyor belt detect?

• Temperature

• Pressure

• Presence of objects

• Speed

What occurs when an item is detected by the sensors in a warehouse?

• The conveyor belt stops

• The motor control relay is activated

• The motor control relay is deactivated

• The sensor sends a signal to the central control system

What does the PLC do when a package reaches the loading dock in the warehouse?

• Activates the loading bay door

• Sends a signal to the forklift operator

• Deactivates the conveyor belt

• Stops the packaging machine

What is the main function of the PLC in the manufacturing plant?

• Control the temperature in the production line

• Control the pressure of the hydraulic system

• Automate the material handling process in the warehouse

• Monitor the speed of the conveyor belts

Answer explanation

The main function of the PLC in the manufacturing plant is to automate the material handling process in the warehouse.

What type of signals do digital output modules send to external devices?

• Analog signals

• Binary signals

• Discrete signals

• Continuous signals

How does the PLC determine when to start or stop the conveyor belt motor in the example scenario?

• Based on the weather conditions

• Based on the input signals received from the sensors

• Randomly

• Based on the time of day

What does the PLC do when an object is no longer detected by the sensors in the example scenario?

• Sends a signal to the sensors

• Deactivates the motor control relay

• Activates the motor control relay

• Stops the conveyor belt