Programming software for TSX Micro and Premium - PL7 Pro version 4.4

Schneider / Telemecanique

The PL7 software is designed to develop your applications and control system Premium Micro. Has the following features:
In the development
Modules specific application without programming
Programming languages ​​4
Predefined functions
Reuse DFBS
Error Resolution
Avail the latest version
Modification online
Animation by code
Application and resolving errors

Aplicaçõpes
Control of machinery and industries
Infrastructure

Advantages
A simple and high performance

Designed for programming industrial controllers (PLC) Modicon TSX Micro and Modicon TSX Premium, the PL7 software range is distinguished by its simplicity, offering design functions more productive, error resolution, high performance, as well as its ease of operation and diagnostics.

It's a simple, high performance, pointing to the platforms Modicon, Telemecanique and Premium

- PL7 Micro
- PL7 Junior
- PL7 Pro
Allows
. Configuring PLC and PLC network
. PLC programming and simulation
. Simulation and Debugging Application to develop
. It runs on Windows and Windows NT4.0 95/98/2000/XP
. Allows changes online
. Support for 5 languages:
- List of instructions
- Structured Text
- Functional block diagram
- Ladder
- Sequential Function Chart (SFC)

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Professional Course in Electronics, Automation and Control
Department of Automation and Control
Module: Robotics

[Continued ...]

Notes Robotics / Worksheet 10

Part 10

21. Servomotors

21.1. - Constitution and Key Features

. Are formed by DC motors, and a speed reducer, together with a position sensor, and a feed back control system.
. In other words, motors are controlled in position (angular or linear).
. Are small and have a wide range of torques.

21.2. - Principle of Operation

. The positioning mechanism adjusts the angular position by means of a coded signal that is sent to it. While this signal is present at its input it retains its angular position.
. Typically the command signal is in the form PWM (Pulse Width Modulation), ie the angular position will depend on the pulse width sent / received.

Note: If you want to deepen their knowledge about the Pulse Width Modulation, Pulse Width Modulation (PWM) in English, see this article in 4 parts:
-> Http://www.profelectro.info/?p=4480
-> Http://www.profelectro.info/?p=4489
-> Http://www.profelectro.info/?p=4499
-> Http://www.profelectro.info/?p=4504

Figure 32 - servomechanisms

22. - Engine Step-by-Step

Figure 33 - Engines Step-by-Step

22.1. Key Features

. They are used in applications that require little strength;
. Can rotate clockwise and counterclockwise;
. Admit incremental variations of angular accuracy;
. Have repeated moves fairly accurate (high repeatability);
. Have low torque;
. Allow a torque support at zero speed;
. Your control can be digital.

22.2. Types

. Bipolar
. Unipolar.
In either case, power supplies are continuous and require a digital circuit that produces the sequence of control signals for the motor to function as intended.

22.3. Operation

. The way in which the engine will work depends largely on the specific application.
. There are cases in which the most important is the torque in other precision, still other speed.
. To be able to work with a motor step-by-step, we need to know their operating characteristics, such as the supply voltage, the maximum current (supported by the coils), degree (accuracy), the torque.
. These engines have various ways of being driven, the most common being the half-step and full step.

22.3.1. Full Step

. In the full step mode can actuate one or two coils in each step, and in the case of a coil consumption and torque will be lower.

. In the following table we can see the sequence of steps in a clockwise direction and the drive coils of a motor driven in full step, with only a coil fed.

Table 2 - Step complete with a reel and fed in rotation in the clockwise

. In the case of the full mode fed with two coils, has higher torque and a higher consumption. The speed is also usually higher in this case, but an engine step-by-step, the maximum speed is highly dependent on electronics and control strategy that is being used.

Table 3 - step complete with two coils rotating in a clockwise direction

22.3.2. - Half Step

. In half-step mode operation, we combine the two previous strategies, thereby obtaining an effect of each half-step change in the drive coils.
. This mode consumes more power, but how can we work with smaller steps, the accuracy is higher. Torque is similar to the previous method, but the speed is often low.

Table 4 - middle step in the clockwise

Note: To change the direction of motor rotation, reverse the sequence of steps.

Note: If you want to deepen their knowledge about the operation of the engines step-by-step instructions, see this animation and this article .

24. - Pneumatic Actuators

24.1. Features and General

. Are similar to hydraulic, with the difference of using air instead of oil.
. The air is highly compressible so that these actuators have low precision and strength, but instead, a high speed.

. The linear pneumatic actuators (cylinders) require complex systems for controlling the position of the points along its course, and therefore can not be applied to uses which require accuracy.

. However, many tasks in industrial processes exist which require only linear actuators which work between these two extreme positions (cylinder fully retracted or fully extended), in which they have a good repeatability.
. Are simple tasks, like material handling, workholding and separating objects, operations, known generically as "catch-and-sets."
. Its low cost and the creation of compressed air makes them very attractive for these simple tasks.
. You can use the pneumatic actuator for rotary joints directly (rotary actuators) or reducing (pneumatic motors lobes or vanes).
. These applications are very specific and only displayed when there are restrictions on the use of electric or hydraulic actuators.

. The programming of these actuators can be done via PLC or even just switches distributors or end-of-course. This type of programming allows some flexibility in the sequence of the drives, but it is quite limited when it comes to changes in the shape and task to be performed.

. We can conclude that pneumatic systems are closer to a Fixed automation than the programmable automation.

25. Questionnaire (X)

1. What is the constitution of a servomotor?
2. What meant by servomotor?
3. Indicate which statements true and which false
a) The servo motors are small motors
b) Each servomotor has a fixed torque
c) the motors step-by-step have low torque.
d) In motors step-by-step, the operation mode that consumes more energy is the full step.
e) In engines step-by-step operating mode with higher accuracy is the full step.
4. In every moment, how the servomotor acquires its angular position?
5. What is the normal form of the command signal from a servo?
6. What kind of applications are used engines step by step?
7. In what sense can run the motors step-by-step?
8. The motors step-by-step display high repeatability. What does that mean?
9. What types of motors step-by-step who knows?
10. Which format of signal sequences motor control step-by-step?
11. The motors step-by-step are AC or DC?
12. To be able to work with a particular engine step-by-step, what are their characteristics, and their values, we have to know in advance?
13. What forms of motor drive step-by-step know?
14. Stepper motors in full how many coils are fed?
15. When put into action only one of the coils of the motor torque developed by the motor is higher or lower than when the two coils put into action?
16. Complete the spaces
The following table corresponds to step _____ complete with coil (s) rotating in the clockwise direction ____________

17. What is big difference between the half-step mode operation and full step?
18. If we want to reverse the direction of rotation of a motor step-by-step, what we have to do?
19. What is the big difference between pneumatic and hydraulic actuators?
20. Sort the pneumatic actuators for accuracy, strength and speed.
21. Why can not the pneumatic actuators to be used in high precision applications?
22. What kind of tasks pneumatic actuators perform well?
23. What is the feature that allows this?
24. As may be made to the programming of pneumatic actuators?

[Continues ...]

Technological Education - 2nd Cycle - 2012/2013: Energy / weathervanes - Practical Work