1. Mitsubishi PLC's analog signal control inverter
Hardware: FX1N, FX2N PLC hosts, equipped with 1 simple FX1N-1DA-BD extended analog output board; or analog input-output hybrid module FX0N-3A; or FX2N-2DA with two outputs; or a four-output FX2N-4DA module, etc.
Advantages: PLC programming is simple and convenient, the speed control curve is smooth and continuous, and the operation is stable.
Defects: In the large-scale production line, the control cable is long, especially when the DA module selects the voltage signal output, the line has a large voltage drop, which affects the stability and reliability of the system. In addition, from an economic point of view, such as controlling 8 inverters, 2 Mitsubishi PLC-FX2N-4DA modules are required, and the cost is 5-7 times that of the selected extended memory communication control.
Second, the switching signal of Mitsubishi PLC controls the Mitsubishi inverter
The output point and COM point of Mitsubishi PLC (MR type or MT type) are directly connected to the STF (forward engine), RH (high speed), RM (medium speed), RL (low speed), and input SG ports of the inverter. Mitsubishi PLC can control the start, stop and reset of the inverter through the program; It can also control different combinations of high-speed, medium-speed and low-speed terminals of the inverter to achieve multi-stage speed operation.
However, because it is controlled by using a switching quantity, its speed regulation curve is not a continuous smooth curve, and it cannot achieve precise speed regulation. This switching control method, its speed regulation accuracy can not be compared with the choice of extended memory communication control.
3. The PLC uses RS-485 modbus-rtu communication method to control the inverter
The new Mitsubishi F700 series inverter uses RS-485 terminals to communicate with the PLC using the Modbus-RTU protocol.
Advantages: PLC programming for the Modbus communication solution is shorter and faster than the RS-485 protocol-free solution.
Defects: PLC programming is still a large amount of work.
Fourth, Mitsubishi PLC uses the fieldbus method to control the inverter
Mitsubishi drives can be built with various types of communication options, such as the FR-A5NC option for CC-Link fieldbuses; FR-A5AP(A) option for Profibus DP fieldbus; FR-A5ND option for DeviceNet fieldbus and much more.
FX series Mitsubishi PLC has a corresponding communication interface module to dock with it.
Advantages: fast speed, long distance, high efficiency, stable operation, simple programming, large number of inverters that can be connected.
Disadvantages: The cost is high, much higher than the cost of using extended memory communication control.
5. The PLC uses RS-485 protocol-free communication method to control the Mitsubishi inverter
This is one of the most common methods used in PLC, and the PLC uses RS serial communication instruction programming.
Advantages: The hardware is simple, the cost is low, and 32 inverters can be controlled.
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Advantages and disadvantages of different output types of Mitsubishi PLC
The three output types of PLC are: transistor output, thyristor output and relay output, what is the difference between these three different output types?
(1) Transistor output:
The biggest advantage is that it is accustomed to high-frequency action, and the echo moment is short, generally about 0.2ms, but it ...
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There is no self-locking reason for the Mitsubishi servo motor to be turned on
In some cases, when the user first touches the use of the Mitsubishi servo motor, it may appear that the Mitsubishi servo motor is not self-locking after it is ready! So, what is the reason for this? And how to deal with it?
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Mitsubishi inverter FR-A800 operating environment
Comfortable operating environment for Mitsubishi inverter FR-A800
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The GOT widescreen family has been expanded with the GT2512
When industrial automation enters the era of artificial intelligence. Human-computer interaction has long surpassed the simple control of machines, and has been upgraded to obtain more information, use more functions and new skills for more accurate and efficient control, and complete the intelligent manufacturing promotion of industrial automation.
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Mitsubishi inverter FR-A800 series selection
Q: When will the CS84 series inverter be selected?
A: CS80 series inverter belongs to the diversified function of small intelligent inverter, covering excitation control and general flux vector control, the volume is 57% of the same model, very fast, in some general functions can be used in this model ...
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Modbus communication and address assignment for Mitsubishi PLC
When using Modbus communication in Mitsubishi PLCs, it is necessary to understand the address allocation of different register types.
The following are the common types of Mitsubishi PLC Modbus addresses and their corresponding functions:
1. Coil Register:
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PLC is different from each output type
The three output types of PLC are: transistor output, thyristor output and relay output, what is the difference between these three different output types?
(1) Transistor output:
The biggest advantage is that it is suitable for high-frequency action, and the sound ...
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Mitsubishi Q series PLC and GX Works2 connection method
01 USB connection
USB connection requires the device USB driver, generally the device will be actively driven after the installation of GX Works2 software, but at a single time due to anti-virus software or system reasons, or the device may not be available, then we need to manually drive the device to the accounting machine. The specific device method is ...
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Mitsubishi low-power Z024 series inverter failure OC cause
(1) Aging of the drive circuit
Due to the use of a long period of time, it will inevitably lead to the aging of components, which will cause the drive waveform to be distorted, and the output voltage will be unstable, so OC alarm will often appear as soon as it is running.
( ...
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Introduction to the Mitsubishi PLC encryption process method
The encryption process is as follows:
** Open the serial port for the first time
[00000000] IOCTL_SERIAL_SET_BAUD_RATE Baud Rate: 9600 (Set baud rate here)
[00000000] IOCTL_SERIAL_SET_LINE_CONTROL StopBits: 1, Parity: Ev ...
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Replacement steps for the internal battery of Mitsubishi PLC
When the battery voltage drops, the power supply is "ON", and the "BATT. V" LED lights up, and the battery is valid for one month from the time the light is on. However, there are times when it is found late, so after finding that the indicator light is on, the battery should be replaced as soon as possible to avoid power failure.
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Programming element for Mitsubishi FX2N series PLCs
Each element of the Mitsubishi FX2N series PLC is indicated by a characteristic letter, such as X indicates the input relay, Y indicates the output relay, M indicates the auxiliary relay, T indicates the timer, C indicates the condition element, etc., and these elements have a specified number.
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Advantages of Mitsubishi Electric fresh air system
Mitsubishi Electric's fresh air system realizes indoor ventilation, but of course, we can't just be limited to simply replacing the outdoor air into the room, a good fresh air should filter the harmful substances in the air, so that the air entering the room is not only fresh, but also clean and harmless.
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Mitsubishi servo motor one-button adjustment function
In the MR Configurator2 servo commissioning software, Mitsubishi has developed a "one-button adjustment" function to solve the problem of rigid noise of servo motors, as follows:
1. Set PA08 to 0003 and adjust the gain to ...
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Self-locking function of servo motor - Mitsubishi
Press the abort button SB1, the contactor KM coil is de-energized, and the auxiliary normally open contact of the KM connected in parallel with SB2 is disconnected to ensure that the KM coil continues to lose power after the button SB1 is released, and the main contact of the KM connected in series in the motor circuit is continuously disconnected and the motor stops. Auxiliary to the KM in parallel with SB2 ...
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Mitsubishi causes electromagnetic interference
1. Harmonic disturbance
The rectifier circuit will generate a harmonic current, which will cause a voltage drop on the impedance of the power supply system, resulting in a distortion of the voltage wavepattern, and this distorted voltage will cause disturbance to many electronic devices (because most electronic devices can only operate in the sine wave).
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Mitsubishi A800 series inverter realizes motor self-learning
Set it up as follows:
Press PU/EXT to switch to PU format
Pr.9 = additional current of the motor
Pr.71=3 (ordinary motor) or 13 (constant torque motor)
Pr.80 = motor power
Pr.81 = number of poles of the motor ( ...
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Troubleshooting methods for Mitsubishi overload
1. Check whether the motor is heated
If the temperature rise of the motor is not high, the first thing to check is whether the electronic thermal protection function of the Mitsubishi inverter is preset reasonably, if the Mitsubishi inverter still has margin, the preset value should be relaxed; For example, the allowable current of Mitsubishi inverter is now out of margin, not ...
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Mitsubishi PLC FX series programmers and other peripherals
1. FX series programmer
The programmer is an important peripheral device of the PLC, which is used to write the user program to the PLC user program memory. On the one hand, it can be programmed by the PLC, and on the other hand, it can monitor the working status of the PLC. With the development of PLC skills, the multi-...
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Mitsubishi inverter installation reactor features
1. Characteristics of the output reactor:
1. It is suitable for reactive power compensation and harmonic control
2. The primary effect of the output reactor is to compensate for the influence of long-line distributed capacitance, and output harmonic current according to the press; 3. ** Ground protection of Mitsubishi inverter and improved power factor, can block from the grid ...
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