[Example] a motor is equipped with an optical encoder (the optical encoder is coaxially installed with the motor), and the FX2N-32MT is used to measure the speed of the motor.
【Solution】
Because the optical encoder is coaxially installed with the motor, the transcription of the optical encoder is the speed of the motor.
1. Software and hardware equipment
(1) One set of GX DEVELOPER V8.86;
(2) 1 FX2N-32MT PLC;
(3) 1 optical encoder (1024 lines);
(4) 1 programming cable.
【Key point】The output pulse signal of the optical encoder is +5V and +24V (maybe 18V), and the effective signal of the input terminal of FX2N is 0V (when NPN connection), it is best not to choose the +5V output optical encoder when selecting the optical encoder. It is also important that the encoder is an NPN type output, so it is important to pay attention to when selecting the encoder. In addition, the 0V terminal of the encoder should be shorted to the COM of the PLC. Otherwise, it cannot form a loop.
So if there is only a +5V output, can the optical encoder be directly used for the above loop measurement speed? The answer is no, but it is feasible to boost the voltage through the transistor, and the specific solution is for the readers to think for themselves.
2. Instruction description
In the Mitsubishi FX series PLC, there is a command SPD that is used to measure the number of pulses per unit of time, which is very convenient. Pulse Velocity Detection Command (SPD)
An example is used to illustrate the use of the Pulse Velocity Detection Command (SPD), as shown in the figure below, when X1 is closed, D1 counts the action of X0 from OFF to ON, and after 100 ms, the result is stored in D0. D1 is then reset and X0 is counted again, and D2 is used to measure the remaining time. Note: The inputs X0-X5 specified here cannot be reused with high-speed counters and abort inputs.
|
More on that
|
Features of the MELSEC iQ-R series of programmable controllers
1. Routine control is consistent with safety control
In the MELSEC-QS series, it is necessary to prepare a system for conventional control and a system for safety control. With the MELSEC iQ-R series of safe programmable controllers, it is possible to combine conventional and safe control into a single system.
Quiet...
|
|
There are three major classifications of inverters - Mitsubishi inverters
There are several ways to classify frequency converters:
According to the classification of the main circuit operation method, it can be divided into voltage-type inverter and current-type inverter; According to the classification of switching methods, it can be divided into PAM control inverter, PWM control inverter and high carrier frequency PWM control inverter;
In accordance with the ...
|
|
Mitsubishi PLC main maintenance and overhaul content points
The main content of the protection and maintenance of Mitsubishi PLC
Although the failure rate of PLC is very low, the control system composed of PLC can operate stably and reliably for a long time, and it is essential to protect and view it alone. Generally, every six months ...
|
|
Mitsubishi servo motor realizes positioning function
The motion control command of the PLC realizes the perfect positioning function. Briefly describe the Mitsubishi PLC positioning instructions, which can be divided into origin regression instructions DSZR, ZRN, positioning instructions PLSY, PLSR, DRVI, DRVA, variable speed operation PLSV.3 In the meantime, PLSY and PLSR are pulse output instructions, and their positioning functions are relatively ...
|
|
PLC Processor Performance Test – Mitsubishi
The processor performance test should be carried out in accordance with the requirements of the system manual, to ensure that the system has the function described in the manual, and is stable and reliable, including the system communication, backup battery and other special modules to view. Redundancy testing is necessary for systems with redundant equipment. i.e. the redundant design ...
|
|
How to write a holding circuit for Mitsubishi PLC
There is a very common kind of circuit in Mitsubishi PLC - the persistence circuit. The insistence circuit means that when the external input switch is a button, it can be pressed once through the insistence circuit to insist on the output, similar to the self-locking in the electrical diagram. We use Mitsubishi PLC as an example to write a sticking circuit.
...
|
|
Mitsubishi servo teaches you to choose a good robot
When evaluating which process is suitable for which approach in the production environment, consider the problem you want to solve and consider all the costs that the robot can save: reduce waste, improve efficiency, improve productivity, improve safety, or reduce labor costs. These costs ...
|
|
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 ...
|
|
Mitsubishi inverter basic questions and answers
1. Question: What is the type of RS485 to RS232C converter used by Mitsubishi inverter for communication?
Solution: FA-T-RS40* Mitsubishi inverter is available.
2. Question: Mitsubishi inverter frequency external potentiometer is given, and the external potential recommended to be used ...
|
|
Precautions related to transportation control of lithium batteries - Mitsubishi
This Skills Brief introduces the United Nations requirements for lithium battery shipment controls and United States guidelines for lithium battery shipment controls.
In addition, the content shown in this skill newsletter will be discontinued as of March 2020.
...
|
|
Precautions for the use of Mitsubishi L series PLC terminal cover
Mitsubishi L series PLC is the same as Q series PLC is a modular PLC, in the specific engineering application, users according to the actual needs of the CPU, power supply, input and output and other special function modules for combination. However, there is a difference between the L series PLC and the Q series PLC in terms of hardware composition.
|
|
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 ...
|
|
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.
...
|
|
The relationship between torque and performance of Mitsubishi servo motors
1. Additional torque
The torque that occurs on the motor shaft under additional voltage, extra load is called the extra torque of the motor.
2. Starting torque
The torque generated by the motor at the moment when a voltage is applied to the motor in the aborted condition is called the starting torque. The starting torque characterizes the electrical...
|
|
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 ...
|
|
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, ...
|
|
Mitsubishi PLC adjusts the built-in time
1. TWR (Time Write) command
Write the time preset value to the built-in real-time clock: Clock information is written to the TWR (Time Write) command. The sequence number of the action instruction is FNC167, [S ·] T, C and D can be used, and only 16-bit operations can be used, accounting for 5 program steps.
The work of the directive ...
|
|
Introduction to Mitsubishi PLC memory classification
Mitsubishi PLC's Memory is a memory device in the measurement muscle system that is used to store processes and data. The overall information in the measuring machine, including the output of the original data, the measuring machine process, the central operating cut-off and the final operating cut-off are stored in the memory. It is based on the controller ...
|
|
Mitsubishi FR-E800 product model introduction
1、3相200V FR-E820-[]K (E)
FR-E820-0.1K、FR-E820-0.2K、FR-E820-0.4K、FR-E820-0.75K、FR-E820-1.5K、
FR-E820-2.2K、FR-E820-3.7K、FR-E820-5.5K、FR-E820-7.5K、FR-E820-11K、
...
|
|
The principle of Mitsubishi servo motor heating
The motor of the core and winding coil is what we commonly see in our daily life, and what is the heating principle of this Mitsubishi servo motor by comparing it with other motors? We know that the winding has resistance, and the loss will occur when energized, and the size of the loss is proportional to the square of the current of the resistance.
|
|
Contact
working hours
