PM865K02 plc

Setting the frequency source parameters to one of 3, 4, or 9 is sufficient. This is the most commonly used one, and its essence is to establish a proportional relationship between the analog quantity and the frequency range. For example, if I give an analog quantity of 0-10V corresponding to a frequency converter and a frequency of 0-50Hz, then when I give an analog quantity of 5V, its output frequency is 25Hz. 

There are usually many ways to give an analog quantity, It can be given directly through PLC or other controllers that can output analog signals, and of course, 0-10V can also be given through a potentiometer and the 10V power supply of the frequency converter itself. The point shifter is essentially a sliding rheostat, which controls the change in voltage between 0-10V by changing the resistance value. The frequency modulation knob on the frequency converter panel is actually a potentiometer, Of course, when wiring through analog terminals, it is necessary to refer to the wiring diagram in the manual specifically.

Energy saving effect: The new Kerui frequency converter is used in the main fan to control wind speed, effectively changing the output of air volume and pressure, achieving the goal of energy conservation. The use of a fan as a frequency converter load device directly affects the speed of the fan. From the perspective of fluid science, the relationship between rotational speed and flow rate is proportional, the pressure of the fluid is proportional to the square of rotational speed, and the shaft power P is proportional to the cubic power of rotational speed. From the practical effect, it can be seen that the speed of the fan has been reduced by half,

 and the natural energy consumption has also been reduced by one eighth, indicating that the gearbox has achieved energy-saving of the main ventilation fan. Moreover, most coal mines use a fan to drive two motors, so based on this feature, one frequency converter can simultaneously control the normal operation of both motors. Regardless of the driving method used to control the power of the frequency converter, the total power cannot be smaller than the sum of the two motors.

By using the i550 MOTEC frequency converter, Lenz can achieve transparency in the process from the transmission shaft to the cloud for our customers and support their digital transformation.

The IO Link master station function equipped with the i-series MOTEC frequency converter provides real-time recognition and diagnostic data from sensors, allowing for easy data exchange between IO Link sensors and actuators. By using Drive DataHub to connect to the cloud, it also saves additional hardware and installation costs, and performs well in status monitoring or predictive maintenance.

Today we will explain an important concept of frequency converters: frequency sources, and some brands may refer to them as given channels. In fact, what we are talking about is the same thing. Previously, as long as a running command was given to the frequency converter, it was already running. However, if the frequency was not given and the frequency was set to 0 at this time, even if the frequency converter was already running, the motor would not rotate due to the output frequency of the frequency converter being 0. Therefore, in general, both the command source and frequency source need to be given simultaneously. The command source is responsible for starting and the frequency source is responsible for controlling the speed, Only in this way can a frequency converter be used to control the motor for speed regulation.

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4 digital inputs, 1 analog input, and 1 relay output.

Product specifications:

Starting torque: 180% at 3 Hz, 200% at 5 Hz (vector)

Carrier frequency: 1-15 KHz

Control method: SVPWM, V/F control, magnetic flux vector control

Output frequency: 0-650.00 Hz

Starting torque: 180% at 3 Hz, 200% at 5 Hz (flux vector)

Protection function: output short circuit, overcurrent/voltage, low voltage, motor overheating, IGBT overheating, grounding/leakage, communication abnormality protection

Cooling method: 0.4KW product natural cooling, other air cooling

Display functions: output frequency, output current, output voltage, output power, alarm recording (up to 12 sets), etc

LED light: frequency monitoring, voltage monitoring, current monitoring, motor operation indication, control mode indication, external operation panel indication

Surrounding temperature: -10~+50 ℃ (unfrozen)

Surrounding humidity: below 90% Rh (without condensation)

Storage temperature: -20~+65 ℃

Protection level: IP20

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