High score to find the PLC control stepper motor program

I recommend consulting a professional, you can buy a PLC with technical assistance, because a system does not necessarily have a set of programs to use, and it also involves debugging. I am a mechanical professional on-site commissioning engineer, like you said, if you are a student, just for graduation design or laboratory use, it is easy to do, but if it is used for production use, it involves many situations, such as: Is there a protection requirement?

Is it used in flammable and explosive environments? Is there control in place? What is the speed and what are the requirements?

Are the forward and reverse speeds consistent? Should I slow down when starting and stopping, and what is the deceleration distance? Wait a minute.

It's too general for you to just ask for a program. Even if there is a master who can help you make it up, you may not be able to use it.

I've only used Mitsubishi's FX and Keyence, and I've written programs to control the stepper motor, and the speed, direction, and amount of running of the stepper motor can be controlled digitally.

That is to say, velocity is a value, and the general unit is Hz, which is how many pulses are sent in a minute.

The amount of running is also a value, that is, how many pulses are sent, and the direction is the symbol before this value, for example, a positive number is a positive rotation, and a negative number is a reversal.

I have a program that I wrote before, and I can send you one if you want it, but there are no annotations.

Last year, I did it for Changqing's customers, and they were 6-speed regulation. Done with Siemens' S7-200. There are only about 6 networs, and the difficulty is the drawings and wiring.

Ladder diagrams, drawings, and annotations can all be given to you, and you will be charged according to the treatment of the company's customers. As a student, I don't want to talk about you anymore. Now treat you as a customer.

Learning. The motor speed has 2 gears that can be reversed. Is the speed controlled by an inverter? Or is it a resistor to bin?

Mitsubishi FX has been written, there is a frequency converter is much more convenient, with resistors do not know how the parameters are, the program can still be done.

I'll add some popularity to you!

You know the principle of action of the stepper motor, that is, according to the direction of rotation one by one to send out the electrical signal, the direction of the signal determines the direction of rotation of the rotor, the frequency of the signal and the number of energized terminals determine the rotation speed of the rotor, the signal is represented by the output number of the output end of the PLC!

Your problem may not be satisfied with the score, because it may take a lot of brains for professionals to solve your problems, or they are engaged in an industry like yours, and some things cannot be exchanged for scores by scores, so I am sorry to consult a professional directly.

1. Full step = 48 microsteps, simulating the forward spin and cospin signals, dividing the period into 48 parts, from 00 to ff timing, and sending data in turn.

PLC pulse command, pulse generator, positioning module choose one of them

Fast, Medium, Slow, Single-step, Fixed-step, Fixed-step?

Control requirements: press the start button, PLC control stepper motor rotates clockwise for 3 cycles, stops for 5 seconds; Then turn counterclockwise for 2 weeks, stop for 3 seconds, and so on; Press the stop button and the motor stops immediately (the motor shaft is locked); Press the offline button and the motor shaft is released. Suppose a three-phase stepper motor is selected with a step angle of 1 2.

When operating, it is set to 4 subdivisions, and the rated current is 1 75A, and when the motor is stopped (the motor shaft is locked), the quiescent current is selected as half-current.

Connection between stepper motor, stepper driver, PLC:

A stepper motor is an actuator that converts a pulse signal into a linear or angular displacement. The output displacement of the stepper motor is proportional to the number of input pulses, its speed is proportional to the pulse frequency, and its steering is related to the phase sequence of the windings of each phase of the stepper motor distributed to the stepper motor. Therefore, we can use PLC to generate the corresponding pulse and direction signals, distribute and amplify the pulse and direction signals through the stepper driver, and then control whether the windings of each phase of the stepper motor are energized, so as to control the operation of the stepper motor.

Figure 1 shows the specific port wiring circuit diagram.

For PLC, to generate pulses at the Y0 end, it is necessary to continuously turn on and cut off Y0. When Y0 is turned on, the positive pole of the 5V DC power supply passes through CP+, passes through the internal electronic circuit of the driver to CP-, presses to Y0 through R, passes through the COM at the output end of the PLC, and then returns to the negative pole of the 5V DC power supply, thus forming a loop. At this point, we get a high electrical frequency inside the driver, which we denote by "L".

When y0 is cut-off, the loop cannot be turned on, and a low frequency is obtained inside the driver, which we denote as 0'. The ring distributor of such a driver receives such a pulse signal, and then the pulse signal is distributed, and each phase winding of the stepper motor is controlled to be energized sequentially. Here we use a 5V DC power supply to get a pulse of current from the stepper driver.

This control voltage is generally between DC 5V and 24V. where R is the current limiting resistor, the pulse current of the general driver is about l0mA, and the R value is about 2K. The input circuit for the reverse signal and the offline signal is the same as the input circuit for the pulse signal described above.

Panasonic PLC, Chapter 8.

Sent Email Problem Issue?

M206: Forward rotation.

M207: Inverted.

y0: pulse output.

y1: reversal signal.

k999999999: the number of pulses.

K100: Acceleration time.

Understand the principle of stepper motor, the control of the non-stepper motor is controlled by pulses, in which the number of pulses is proportional to the distance traveled by the stepper motor, and the frequency of the pulse is proportional to the speed of the stepper motor, which can be written with the command to change the pulse frequency, such as omron's can be written with plus(65), and the model can be found in the corresponding manual!!

Khan PLC control stepper motor is a sentence.

plsy k？？ k？？ y0

Flat rate (speed) Pulse amount (how many steps) The motor works (only 2 Y0 or Y1 can be controlled).

Add a D pulse in front of PLSY K3000 K30000 Y0 to be above 32000 and only below 32000 without adding.

It is generally indicated in the pulse-specific instructions.

Hello! The first question: Generally speaking, the stepper motor needs a driver to drive, you can choose a driver, the driver is controlled by the PLC, and then the motor action is driven by the driver. Many manufacturers of drives are sold, such as Haydn drives, Tuogu drives, etc.

The second question: e=6v refers to the voltage of each phase, in fact, it does not matter if the voltage added to the two phases does not exceed the rated current of the coil.

The third question: IW should refer to the phase current, can not exceed this current, below this current does not matter, but in this way the driving force of the motor will be reduced.

Fourth question: This question is repeated, as above.

The fifth question: This mainly depends on the form of the motor you choose.

PLC cannot directly step the motor, the capacity is not enough, and the driver needs to be added.

The first problem can be connected to the relay after the PLC, and I heard that this has been a trend since then.

Listen to you say so much, I can tell you, 1 you don't know much about PLC stepper motors, 2, JCCO this brand to be honest, I haven't used it, I generally contact Mitsubishi, Panasonic and the like also include some drivers from Siemens, 3, in general, the general driver is with the motor (note pairing) (whether you are servo or stepper), about the pulse sent by the PLC, you can rest assured, as long as there is no problem with your previous program, there is no problem, such as Mitsubishi's PLC, with Panasonic drive, Panasonic's motor, there is no problem, and the size of the driver's power, such as the general fiber 2kw drive with 2kw motor, the motor rate can not be greater than the driver, otherwise it is likely to burn out the drive, okay, I have said it so clearly, specifically, you have to see some instructions of the motor and the driver, whether it can be used together, by the way, the motor also has AC and DC distribution Lu Finger. The hands are all weak, not to mention the loss. If you have any questions, you can have QQ on my main business, and I have time to be together, and I am also a lover of this.

Seeing that I have said so much, I still have to give some points, otherwise it will be too much

Stepper motors have the characteristics of fast start and stop, precise stepping and positioning, so they are often used as control components for industrial process control and instrumentation. At present, the typical control method is to use a single-chip microcomputer to generate pulse trains to control the stepper motor. However, the use of single-chip microcomputer control, not only to design complex control programs and IO interface circuits, but also to the harsh environment of the industrial site has poor adaptability and low reliability.

The stepper motor based on PLC control has the advantages of simple design, convenient implementation, high positioning accuracy, flexible parameter setting, etc., and is used in industrial process control, with high reliability and convenient monitoring.

The main characteristics of stepper motors.

1) Step angle and static step error: The step angle of the stepper motor is an important parameter to determine the pulse equivalent of the open-loop servo system, the step angle of the common reactive stepper motor in CNC machine tools is generally Under normal circumstances, the smaller the step angle, the higher the machining accuracy, the static step error refers to the difference between the theoretical step angle and the actual step angle, expressed in minutes, generally within 10'. The step error is mainly caused by the manufacturing error of the tooth pitch angle of the stepper motor, the uneven air gap between the stator and the rotor, and the uneven electromagnetic torque of each phase, and the step error directly affects the machining accuracy of the work and the dynamic characteristics of the stepper motor.

2) Dynamic frequency FD: When there is no load, the stepper motor starts suddenly from a standstill, and enters the normal operation of the person without losing the highest frequency, called the starting frequency or the sudden jump frequency is expressed by FD, if the starting frequency is greater than the sudden jump frequency, the stepper motor can not start normally, FD is related to the load inertia, generally speaking, it decreases with the growth of load inertia. When starting at no load, the frequency of the change of the energized state of the stator winding of the stepper motor cannot be higher than the burst frequency.

3) The highest working frequency fmax of continuous operation, when the stepper motor is running continuously, it can accept, that is, the limit frequency fmax that ensures that the operation is not lost, is called the maximum working frequency. It is the parameter that determines the maximum change frequency of the energized state of the stator winding, and it determines the maximum speed of the stepper motor. Its value is greater than FQ and varies with the nature and size of the load, as well as with the drive power supply.

4) Acceleration and deceleration characteristics: The acceleration and deceleration characteristics of the stepper motor are to describe the acceleration and deceleration of the stepper motor from stationary to working frequency and from working frequency to stationary in the process of acceleration and deceleration.

Tech Community:

PLC controls the stepper motor, and requires three signals, one of which is the pulse signal, a switching direction signal, and a switching enable signal (this signal affects whether the stepper motor works).

Such as Mitsubishi's PLC, Y0, Y1, Y2, Y3 that can send pulses, of course, different types of PLC are different, which needs to see the corresponding programming manual. The switching quantity can be selected at will, such as the direction signal and the enable signal can be selected as other points as the control output (of course, if the dual-axis control is leaked, it may not be arbitrary). If more axis control is required, a dedicated PLC or module is required.

Sending pulses is simple, such as: DPLS K500 K1000 Y0, that is, to send 1000 pulses to Y0 at a speed of 500 pulse seconds.

Stepper motor drivers generally have three inputs, pulse input, direction, and enable.