How does the PLC collect the pressure measured by the pressure sensor and how to display the pressure curve through the touch screen?
Your PLC uses analog ports to accept analog data of the sensor, and then converts it into the program
No matter what brand of PLC switch is unable to complete the pressure collection, use an analog acquisition module, and then do analog conversion within the PLC. To display the pressure curve on the touch screen, communicate the PLC with the touch screen, and then touch the screen with a curve control.
The sensor is measured (pressure, temperature, velocity, position, etc.) can be used to convert the signal (voltage, current, resistance, electromagnetic etc.) a device, PLC analog inputs only accept standard signal (0-5V DC voltage is 4-20mA DC analog, analog). So and PLC with the use of sensor must be converted into a standard signal to the PLC, this is the transmitter, it is can be converted into a standard signal sensor. So that the signal is collected by the transmitter to PLC, said, PLC is the standard signal to analog signal, and PLC is an electronic chip, is a member in the computer family, and it is the same computer, digital signal processing, is 0, 1 code. So it needs to be input from its A-D module (analog input) into the amount of digital data that it can accept. It is the output of the digital quantity, and displayed on the display screen is the need for analog, so we must through its D-A module (analog output) output to the screen to display, and the input is actually a reverse process, only with different components, functions, the real PLC is a hub. Control center. These are PLC analog input and output processing, digital quantity (switch), for it is very good appetite, and no conversion, direct processing on the line. PLC involves many things (electronic, electrical, motor, servo control, detection, etc.), it is intelligent things, use involves setting or programming (main control computer, control software, communication, PLC, inverter, touch screen) where there are many, you may say these be clear about it, hoping to help you.
