A servo motor encoder power supply communication method and system
A technology of servo motor and communication method, which is applied in the field of servo motor encoder power supply communication method and system, can solve the problems of poor anti-interference ability and inconvenience, and achieve the effects of strong anti-interference ability, saving consumables, and simple structure
Active Publication Date: 2019-07-09
武汉迈信电气技术有限公司
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Problems solved by technology
The number of connections is large (two voltage supply lines, two digital communication lines, at least four connections are required), and the anti-interference ability is poor (the communication link is a digital link. Once the high-level communication data is disturbed, it will cause great damage to the entire data. large impact), when the line is too long, relays are required (power supply and communication links become larger as the line becomes longer), which brings a lot of inconvenience to actual use
Method used
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[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0027] Such as figure 1 As shown, a servo motor encoder power supply communication method includes the following steps:
[0028] Step S1, the servo driver transmits data to the encoder by changing the current on the analog link, and the encoder receives the data;
[0029] The step S1 specifically includes the following steps:
[0030] Step S1.1, the servo driver increases the current value delivered to the encoder on the basis of the initial current value A mA and lasts for a preset first time B milliseconds;
[0031] Step S1.2, the encoder detects whether the current on the link has lasted for the preset first time B milliamps on the basis of being greater than the initial current value A milliamps, if yes, go to...
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The present invention relates to a power supply communication method and system for a servo motor encoder. The servo drive and the encoder of the present invention are connected through an analog link. Both the servo drive and the encoder are provided with a variable constant current source module. The variable constant current source module is used to supply power to the encoder and transmit data, and the variable constant current source module on the encoder is used to transmit data to the servo drive; the encoder is also equipped with a current / voltage conversion module, so The above-mentioned current / voltage conversion module is used to convert the current delivered by the servo driver into a voltage to supply power to the encoder. The invention combines the communication line and the power supply line into one, uses the same link for power supply and communication, realizes data transmission by adjusting the magnitude of the current, has a simple structure, saves consumables, and uses an analog link instead of a digital link for the link. Strong anti-interference ability, easy to operate and use.
Description
technical field [0001] The invention belongs to the field of servo motor control, and in particular relates to a power supply communication method and system for a servo motor encoder. Background technique [0002] As the position feedback device of the servo motor, the encoder is an important part of the servo control system, and it responds to the instructions of the servo drive to return real-time position information. In practical applications, because the encoder is installed at the end of the servo motor, the servo motor is connected to various transmission mechanisms, and the servo driver is installed in the cabinet, the interconnection between the two requires a long connection. In addition to the encoder having a communication line connected to the servo driver, the servo driver also needs to provide a dedicated power supply line to provide it with operating voltage. The number of connections is large (two voltage supply lines, two digital communication lines, at l...
Claims
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IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 苏智胜
Owner 武汉迈信电气技术有限公司