(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.
(2) Damage to the IPM module will also cause an OC alarm
The power module used in the Z024 series of machines not only contains over-current, under-voltage and other detection circuits, but also contains amplification drive circuits, so whether it is damage to the detection circuit, damage to the drive circuit, and damage to the high-power transistor, it may cause OC alarm.
(3) The reason for the failure of no display is mostly caused by the damage of the thick film of the switching power supply.
(4) An ERR fault is an undervoltage fault, usually caused by a problem with the resistor or wiring of the voltage detection loop, rather than the actual input voltage. Most of the OC faults of the A200 series are caused by the damage of the driving circuit, and its driving circuit adopts a thick film circuit with a ceramic package, which brings certain difficulties to maintenance, and its thick film circuit is mainly based on a circuit designed to drive optocouplers.
(5) In addition, we will encounter some LV faults, and the occurrence of undervoltage faults is mostly due to the failure of the bus detection circuit, and Mitsubishi inverter has also designed a thick film circuit for detecting voltage and current. The damage of the switching power supply pulse transformer is also a common fault of the A200 series inverter, due to the short circuit of the switching power supply output load, or the sudden change of the bus voltage, resulting in the damage of the primary and secondary windings of the pulse transformer.
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Mitsubishi PLC ladder programming method
Ladder concept: It is a ladder pattern composed of graphical symbols that indicate the programming elements inside the PLC.
Rules for writing ladders:
Suitable for the left bus, finally the right bus
The contacts should be drawn on the horizontal line, not ...
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How Mitsubishi PLC works
A. A scanning cycle is divided into input sampling, program fulfillment, and output rewriting.
B. Each scanning process. The convergence samples the input signal. The convergence rewrites the output signal.
C. Component image register ...
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Mitsubishi servo motors achieve precise positioning
The servo control system is a process control system that enables the output of the controlled quantity such as the position, direction, and situation of the block to follow the overall goal (or given value) of the input at will.
So how does the Mitsubishi servo motor maintain precise positioning, how to look at its closed-loop control characteristics, today ...
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The weight conversion method of the Mitsubishi weigh module
Component conversion is a process in which an analog signal (load converter output voltage) input from outside the programmable controller is converted into a digital output value and a total component output value, and then stored in buffer memory. After the conversion process, the conversion completion (XE) will change to ON, and the transformation completion mark (Un\G1 ...
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Precautions for the use of Mitsubishi servo motor with brake
1. Occasions with brake servo motors:
The servo motor is mainly loaded by the motor shaft, assuming that the load driven by the motor shaft is vertical, after the whole control system is powered off, the load on the servo motor shaft will be driven to run down under the action of gravity, so that ...
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The origin of Mitsubishi servo motion control is returned
1. The so-called positioning is to let the servo motor go to a confirmed position.
2. This direction can be so incremental, or so ***. For example, we are now on the road, and we have to go forward 10 meters, which is equivalent to adding 10 meters to our bearing.
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The matching relationship between the inverter and the motor - Mitsubishi
It has become an irreversible trend to drive the motor through the inverter, and in the actual application process, because the matching relationship between the inverter and the motor is not very reasonable, it often leads to some problems. When selecting an inverter, you should fully understand the load characteristics of the equipment driven by the inverter. Ms. Ginseng ...
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The correct maintenance method for Mitsubishi inverters
Mitsubishi inverter we have to maintain the inverter module frequently, to regularly check the Mitsubishi inverter module, especially the maintenance of the cooling fan, due to the high power of the cooling fan, high speed, in the dusty working environment, simply lead to the radiator exhaust hole blockage, so that the internal electric ...
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Seven-step method for PLC project debugging - Mitsubishi PLC
Many novices in the electrical industry are not sure how to start debugging after completing the planning links such as electrical control cabinets and PLC programs. Perhaps some people due to inappropriate debugging methods have led to PLC burning and other problems, so how should the planned electrical system be debugged? Follow these seven steps. ...
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Mitsubishi GM AC Servo MR-JE
One-click adjustments
Servo adjustment can be completed with one-button operation without the need for a computer.
In addition, the oscillation button control and robust filter can be automatically adjusted.
Instantaneous stop tolerance increases
It is equipped with an instantaneous stop TOUGH DRIVE function and a large capacitance ft main circuit capacitor.
...
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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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The difference between Mitsubishi PLC source type and leak type
Mitsubishi PLC split source type (PNP) or drain type (NPN), here are their differences
1: Leakage logic: When the current flows out of the signal input terminal, the signal becomes ON, which is leakage logic. The current flows through the terminals and has the output characteristics of an NPN transistor.
2: Source logic: When ...
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Mitsubishi servo motor types and advantages
1. DC servo
The structure is simple and easy to operate. However, considering the actual operation, the DC servo motor has introduced mechanical equipment for reversing installation, which increases the cost, has many problems, and is inconvenient to maintain, and often interferes with the production and manufacturing due to the sparks of carbon brushes, and electromagnetic interference will occur. Combine...
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Introduction to Mitsubishi PLC network structure
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The reason why the computer programming software and the Mitsubishi PLC cannot communicate
What is the reason why the programming software on the computer and the Mitsubishi PLC cannot communicate? How do I set the port of the communication line?
There are several reasons why communication may not be available:
1. It may be that the PLC is not energized;
2. Programming software to create ...
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Mitsubishi touch screen common faults and solutions
Fault 1: Mitsubishi touch screen contact deviation
Phenomenon: The direction of finger contact does not match the mouse arrow.
Analysis: When calibrating the orientation after installing the screwdriver, there is no vertical contact with the bull's-eye. Solution: Recalibrate the bearing.
...
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Mitsubishi servo drive system requirements
Servo drive system requirements
1. Wide speed regulation
2. High positioning accuracy
3. Satisfactory transmission rigidity and high speed stability
4. Fast response, no overshoot
In order to ensure productivity and processing quality, in addition to the requirement of high positioning accuracy ...
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Low-voltage electrical faults and maintenance methods - Mitsubishi
In the process of operation, low-voltage electrical appliances will present problems due to improper use or long-term operation of aging components, and there are many kinds of problems, and the common problems are analyzed and dealt with.
1. Contact problems and repairs
The contact is the primary component of the low-voltage switching coupon, ...
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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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An introduction to the types of data inside the Mitsubishi FX series
A lot of data is used in the internal structure of the PLC and in the user's use program. These data have the following forms in terms of structure or number system.
(1) Decimal number
Decimal numbers are also known as word data in PLC. It is first and foremost ...
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