What is a proximity switch? (Sensor)

What is a Proximity Switch? (Sensor)

What is a proximity switch? A proximity switch is a type of sensor that detects the presence or absence of an object without physical contact. It uses electromagnetic fields, light, or sound to sense the proximity of an object. This technology is widely used in various industries for automation and control purposes. Proximity switches are … Read more

XY-MD02 Temp Humidity Serial UART Communication

XY-MD02 Temp Humidity Serial UART Communication

To get started with the XY-MD02 temperature and humidity sensor, we will be using the program PuTTY for serial communication. We will use RS485 serial communication to establish a connection and show how to read the values and parameters of the XY-MD02 sensor effectively. Additionally, we will explore the automatic polling feature, which allows for … Read more

Timing Diagram NOT Just Used for a Timer

Logic circuits in a PLC ladder logic program are either on or off. The inputs change, which will affect the outputs. This can be expressed in a timing diagram. The timing diagram or chart will show you how the ladder logic program will respond to the changing states of the inputs and outputs. This visual … Read more

Productivity PLC Node-RED MQTT – P1000 / P2000

Productivity PLC Node-RED MQTT - P1000 / P2000

We will use an MQTT broker in Node-RED to communicate to the productivity PLC clients. MQTT stands for Message Queuing Telemetry Transport. This simple ‘publish and subscribe’ communication protocol does not take too many resources. Constrained devices with low bandwidth are ideal for MQTT. This protocol provides machine-to-machine (M2M) connectivity, perfect for the Internet of … Read more