GE IC800SSI228RD2 SERVO CONTROL 28AMP 230VAC DEVICENET 2SK

Essential details：IC800SSI228RD2 SERVO CONTROL 28AMP 230VAC DEVICENET 2SK GE

Servo control is the human activity that controls the generated motion and the motion of the object in order to meet a certain purpose. The so-called servo control refers to the effective control of the position, speed and acceleration of the object movement. Such controls have been popularized in various fields. Servo control systems refer to feedback control systems used to accurately follow or reproduce a process.

The servo system can be roughly divided into the following items:

1, instruction part: the output device of the action instruction signal

2, drive part: receives the output of the command part, and drives the actuator (such as the motor) action device

3, the feedback part: the device that detects the execution structure or the load state

4, the actuator: receives the output signal of the driving part to produce torque, position and other states

Servo internal structure:

Control mode

General servo has three control modes: speed control mode, torque control mode, position control mode.

1. Speed control

Velocity loop block diagram

IC800SSI228RD2

1) The speed system means that the motor runs according to the given speed instruction.

2) The application of speed control is quite wide: continuous speed control system requiring fast sound seat; Positioning system by upper closed loop; A system that requires multiple column speeds for fast switching.

3) Usually the speed of the servo is given as an analog quantity, that is, the size of the analog amplitude determines the size of the given speed, and the positive and negative determines the motor should be dependent on the speed instruction gain (Pn300).

Matters needing attention

1) The speed loop gain Pn102 is usually set higher to make the whole system respond faster and the motor rigidity will be enhanced. However, a large gain may cause the system to vibrate. Generally, the parameter is set larger when the load inertia is large.

2) Speed loop integration time Pn103, its role is to eliminate the static difference, the larger the value is set, the slower the response, the longer the time to arrive at the instruction. Generally, the greater the load inertia, the greater the integration time should be set.

3) When the upper computer is closed loop, should try not to set soft start deceleration time parameters Pn306, Pn307.

4) If there is no upper computer as a closed loop, it is hoped that the motor will be completely stopped by analog quantity, then zero clamp or proportional control must be used.

5) When the upper machine is used as the position closed loop, the analog quantity cannot be automatically zeroed.

2. Torque control

1) Non-speed control, control of the torque generated is typical torque control.

2) Often used in tension control and other occasions

3) The input is an analog quantity, and the relationship between the analog quantity and the torque quantity depends on the torque instruction gain.

4) For example, if the user sets Pn400 to 100, it shows that the output torque of the motor can reach 100% of its rated torque if the analog amount of 10ν is input.

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