CN216751778U - Clock synchronization system - Google Patents
Clock synchronization system Download PDFInfo
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- CN216751778U CN216751778U CN202122977411.4U CN202122977411U CN216751778U CN 216751778 U CN216751778 U CN 216751778U CN 202122977411 U CN202122977411 U CN 202122977411U CN 216751778 U CN216751778 U CN 216751778U
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Abstract
The utility model provides a clock synchronization system, which comprises a clock synchronization device and a frequency converter controller, wherein the clock synchronization device comprises a power supply, a real-time clock module and a control unit, the power supply is respectively connected with the real-time clock module and the control unit and is used as a power supply for the real-time clock module and the control unit; the real-time clock module is in communication connection with the control unit, so that the control unit receives a first time service signal representing real-time from the real-time clock module; the clock synchronization device is in communication connection with the frequency converter controller, so that the control unit can send a second time signal to the frequency converter controller, wherein the second time signal is a signal based on the first time signal. The clock synchronization system enables the frequency converter controller to automatically acquire real-time, is convenient to connect, does not need to be set, and does not need to occupy industrial networks and CPU resources of the frequency converter controller.
Description
Technical Field
The utility model relates to a clock synchronization system especially relates to a clock synchronization system of converter controller.
Background
For some inverter products, the controller unit usually does not contain a real-time clock therein, which may cause the event records of the inverter, such as the operation records, the fault records, the alarms, etc., to be unable to match the actual time, thus causing difficulties in monitoring and analyzing the time. At present, real-time clock data can be sent to the frequency converter controller through a high-level operation panel, and the time response of the controller is set to be a real-time clock, and a real-time clock signal can also be sent to the frequency converter controller through an upper computer of an industrial network, such as a PLC or an engineer station. The method firstly needs the frequency converter to be set, secondly, the transmission is carried out through the industrial network connected with the frequency converter controller, which inevitably causes additional network burden,
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a clock synchronization system to solve the above problems.
According to an embodiment of the present invention, there is provided a clock synchronization system, including a clock synchronization device and a converter controller, wherein the clock synchronization device includes a power supply, a real-time clock module and a control unit, the power supply is connected to the real-time clock module and the control unit, respectively, and is used as a power supply for the real-time clock module and the control unit; the real-time clock module is in communication connection with the control unit, so that the control unit receives a first time service signal representing real-time from the real-time clock module; the clock synchronization device is in communication connection with the frequency converter controller, so that the control unit can send a second time signal to the frequency converter controller, wherein the second time signal is a signal based on the first time signal.
Furthermore, the clock synchronization device is in communication connection with the frequency converter controller through the first communication link, and the first communication link includes a first control unit serial port arranged on the control unit, a frequency converter unit serial port arranged on the frequency converter controller, and a first serial bus connected between the first control unit serial port and the frequency converter unit serial port.
Further, the first serial bus is a serial bus that communicates based on PPI protocol.
Furthermore, the clock synchronization device is connected with the frequency converter controller through a plug-in connection.
Furthermore, the real-time clock module is in communication connection with the control unit through the second communication link, and the second communication link includes a second control unit serial port arranged on the control unit, a clock module serial port arranged on the real-time clock module, and a second serial bus connected between the second control unit serial port and the clock module serial port.
Further, the second serial bus is based on I2And C, serial bus for protocol communication.
Further, the control unit receives a first time signal representing real-time from the real-time clock module at preset time intervals, and the clock synchronization device sends a second time signal to the frequency converter controller at the preset time intervals.
Further, the preset interval time is one hour.
Further, the clock synchronization system further includes: the clock correction device and the clock synchronization device are in communication connection through the third communication link, so that the control unit receives a third time service signal representing standard real-time from the clock correction device and adjusts the real-time of the real-time clock module according to the third time service signal.
Further, when the control unit receives a third time signal representing standard real-time from the clock correction device and adjusts the real-time of the real-time clock module according to the third time signal, the clock synchronization device stops sending the second time signal to the frequency converter controller.
Based on the utility model provides a clock synchronization system carries out the connection communication with clock synchronization device and converter controller, acquires real-time data from its inside real-time clock module through clock synchronization device to write this real-time data into in the converter controller, make the converter controller have real-time clock, thereby the convenient time relevant data to the converter controller is looked over, is analyzed etc. The clock synchronization system is convenient to connect, does not need to be arranged, does not need to occupy an industrial network, and does not need to occupy CPU resources of the frequency converter controller.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings, in which:
FIG. 1 is a schematic block diagram of a clock synchronization system according to one embodiment;
fig. 2 is a schematic structural diagram of a clock synchronization system according to another embodiment.
Wherein the reference numbers are as follows:
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by the following exemplary embodiments.
In the prior art, due to problems of design, manufacturing cost and the like, a real-time clock is not included in a controller unit of some frequency converter products, so that event records of the frequency converter, such as event records of operation, faults, alarms and the like, cannot be matched with actual time, and further the difficulty of monitoring and analyzing the time is caused. The method of sending real-time clock data to the frequency converter controller through a high-level operation panel such as AOP30 and setting the time response of the controller to be the real-time clock is high in cost, installation needs wiring and punching, time consumption is high, and an upper computer through an industrial network is required to be set to be put into use after installation is completed. Based on this, the utility model provides a clock synchronization system that can solve above problem.
Specifically, fig. 1 is a schematic structural diagram of a clock synchronization system according to an embodiment;
as shown in fig. 1, the present invention provides a clock synchronization system, which includes a clock synchronization device and a frequency converter controller, wherein the clock synchronization device includes a power supply, a real-time clock module and a control unit, the power supply is connected to the real-time clock module and the control unit respectively, and is used as a power supply for the real-time clock module and the control unit; the real-time clock module is in communication connection with the control unit, so that the control unit receives a first time service signal representing real-time from the real-time clock module; the clock synchronization device is in communication connection with the frequency converter controller, so that the clock synchronization device can send a second time signal to the frequency converter controller, wherein the second time signal is a signal based on the first time signal.
In the embodiment of the present disclosure, the clock synchronization device is composed of a power supply, a real-time clock module and a control unit, and preferably, the clock synchronization device may be a box integrating the above components in one housing; the power supply is connected with the real-time clock module and the control unit respectively to supply power to the real-time clock module and the control unit, and the power supply is, for example, an industrial 24V direct current voltage input and is converted into a 5V direct current voltage output by a converter. The real-time clock module is, for example, a finished module with power-off protection, which is well known to those skilled in the art and will not be described in detail herein; the control unit is for example a 51 series single chip microcomputer; the control unit is connected with the real-time clock module to obtain a first time signal representing real-time from the real-time clock module, wherein the first time signal comprises real-time data and related content of a communication protocol field; the clock synchronization device is in communication connection with the frequency converter controller to send a second time signal to the frequency converter controller, wherein the second time signal contains real-time data based on the first time, and can also contain, for example, related content of a communication protocol field and a control field for writing the real-time data in the second time signal into the frequency converter controller, so that the frequency converter controller obtains real-time.
Furthermore, the clock synchronization device is in communication connection with the frequency converter controller through a first communication link, and the first communication link comprises a first control unit serial port arranged on the control unit, a frequency converter unit serial port arranged on the frequency converter controller, and a first serial bus connected between the first control unit serial port and the frequency converter unit serial port.
Further, the first serial bus is a serial bus communicating based on PPI protocol.
The PPI communication protocol is developed by Siemens for the S7-200 series PLC. And connecting the clock synchronization device with the frequency converter controller through a special network based on PPI protocol communication, so that the clock synchronization device sends the second time service signal to the frequency converter controller, and real-time data in the second time service signal is written into the frequency converter controller.
Furthermore, the clock synchronization device is connected with the frequency converter controller through a plug-in connection.
Specifically, in the implementation mode, the frequency converter controller is provided with an SUB-D serial port, and the clock synchronization device is connected with the SUB-D serial port, so that the clock synchronization device can be plugged and used conveniently and quickly without setting.
In the above implementation manner, after the clock synchronization device is plugged into the frequency converter controller and the power is turned on, the clock synchronization device performs a short delay after obtaining the working voltage, waits for the completion of the start of the frequency converter controller, for example, the delay waiting time is set to 40 seconds, so as to ensure that the controller has been started, and then the control unit starts to receive the first time signal from the real-time clock module to obtain the current real-time, and sends the second time signal to the frequency converter controller to write the real-time into the frequency converter controller.
Furthermore, the real-time clock module is in communication connection with the control unit through a second communication link, and the second communication link comprises a second control unit serial port arranged on the control unit, a clock module serial port arranged on the real-time clock module, and a second serial bus connected between the second control unit serial port and the clock module serial port.
Further, the second serial bus is based on I2And C, serial bus for protocol communication.
I2The C protocol is a synchronous, bidirectional communication protocol, and the control unit is based on I2The protocol C obtains the first time service signal from the real-time clock module quickly and efficiently. Wherein the first time signal isIncluding less signals of real time data in the real time clock module.
Furthermore, the control unit receives a first time signal representing real-time from the real-time clock module at preset interval time, and the clock synchronization device sends a second time signal to the frequency converter controller at the preset interval time.
The control unit receives the first time service signal from the real-time clock module based on the preset interval time, and sends the second time service signal to the frequency converter controller according to the preset interval time, so that the time writing frequency of the frequency converter controller can be flexibly controlled.
Further, the preset interval time is one hour.
The control unit obtains a first time signal of the real-time clock module by taking one hour as a period so as to obtain real-time, and the control unit sends a second time signal containing real-time data to the frequency converter controller by taking one hour as a period, so that the time writing frequency of the frequency converter controller is set on a reasonable value, the use requirement on the real-time data of the frequency converter controller is met, and the burden of the device is not increased. In addition, the preset interval time can be set according to needs, such as half an hour, two hours and the like.
FIG. 2 is a schematic block diagram of a clock synchronization system according to another embodiment;
further, as shown in fig. 2, the clock synchronization system according to the embodiment of the present disclosure further includes: the clock correction device and the clock synchronization device are in communication connection through the third communication link, so that the control unit receives a third time service signal representing standard real-time from the clock correction device and adjusts the real-time of the real-time clock module according to the third time service signal.
Specifically, the clock correction device may be a PC or a PG programmer, and in one case, for example, after the battery of the real-time clock module is replaced, the clock synchronization device is connected to the PC or the PG programmer by using a USB communication cable, so that the control unit may obtain a third time signal representing standard time from the clock correction device, and adjust the time of the real-time clock module according to the third time signal, where the third time signal is a signal containing standard real-time data.
In an implementation manner of the above embodiment, after the clock calibration device is connected to the clock synchronization device, the control unit first obtains a first time service signal of the real-time clock module at that time to obtain real-time clock data at that time, transmits the real-time clock data to the clock calibration device through the USB, compares the real-time clock data from the real-time clock module with the current standard real-time in the clock calibration device to determine whether time correction is required, and if so, sends a third time service signal of the current standard real-time data to the control unit through software installed in the clock calibration device, and writes the third time service signal into the real-time clock module by the control unit, where the current standard real-time is, for example, an operating system time in a PC or a PG programming machine of the clock calibration device.
Further, when the control unit receives a third time signal representing standard real-time from the clock correction device and adjusts the real-time of the real-time clock module according to the third time signal, the control unit stops sending the second time signal to the frequency converter controller.
Based on the clock synchronization system of the embodiment, in the process of correcting the clock synchronization device, the clock data writing of the clock synchronization device to the frequency converter controller is interrupted, two programs are mutually independent and are not prone to error, meanwhile, the time of the real-time clock module is guaranteed to be standard real-time, and then the writing time of the frequency converter controller is also made to be standard real-time.
To sum up, according to the utility model discloses a clock synchronization system has following advantage:
1. an external clock synchronization device is additionally arranged to write time into the frequency converter controller, so that time-related data of the frequency converter controller can be conveniently checked and analyzed.
2. The added clock synchronization device can be connected with the frequency converter controller in a plug-and-play mode, and the frequency converter controller is simple and efficient without arrangement.
3. And industrial networks and CPU resources of the frequency converter controller are not occupied.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Clock synchronization system, characterized in that it comprises a clock synchronization device (1) and a frequency converter controller (2), wherein,
the clock synchronization device (1) comprises a power supply (11), a real-time clock module (12) and a control unit (13), wherein the power supply (11) is respectively connected with the real-time clock module (12) and the control unit (13) and is used as a power supply for the real-time clock module (12) and the control unit (13); the real-time clock module (12) is in communication connection with the control unit (13), so that the control unit (13) receives a first time service signal representing real-time from the real-time clock module (12);
the clock synchronization device (1) is in communication connection with the frequency converter controller (2) so that the clock synchronization device (1) can send a second time signal to the frequency converter controller (2), wherein the second time signal is a signal based on the first time signal.
2. Clock synchronization system according to claim 1, wherein the clock synchronization device (1) is communicatively connected to the converter controller (2) via a first communication link (3), the first communication link (3) comprising a first control unit serial port provided at the control unit (13), a converter unit serial port provided at the converter controller (2), and a first serial bus connected between the first control unit serial port and the converter unit serial port.
3. The clock synchronization system of claim 2, wherein the first serial bus is a serial bus based on PPI protocol communications.
4. Clock synchronization system according to any of claims 1 to 3, characterized in that the clock synchronization means (1) are connected to the frequency converter controller (2) by means of a plug connection.
5. A clock synchronization system according to any of the claims 1-3, wherein the real time clock module (12) is communicatively connected to the control unit (13) via a second communication link (14), the second communication link (14) comprising a second control unit serial port arranged on the control unit (13), a clock module serial port arranged on the real time clock module (12) and a second serial bus connected between the second control unit serial port and the clock module serial port.
6. The clock synchronization system of claim 5, wherein the second serial bus is I-based2C protocol communication.
7. The clock synchronization system according to any one of claims 1 to 3, wherein the control unit (13) receives a first time signal representing real time from the real time clock module (12) at preset intervals, and the clock synchronization device (1) transmits a second time signal to the converter controller (2) at the preset intervals.
8. The clock synchronization system of claim 7, wherein the predetermined interval time is one hour.
9. The clock synchronization system of any one of claims 1-3, further comprising:
a clock correction device (10) providing a standard real time;
and the clock correction device (10) and the clock synchronization device (1) are in communication connection through the third communication link (20), so that the control unit (13) receives a third time signal representing standard real-time from the clock correction device (10) and adjusts the real-time of the real-time clock module (12) according to the third time signal.
10. The clock synchronization system according to claim 9, wherein the clock synchronization device (1) stops transmitting the second timing signal to the inverter controller (2) when the control unit (13) receives a third timing signal representing a standard real time from the clock correction device (10) and adjusts the real time of the real time clock module (12) based on the third timing signal.
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| CN202122977411.4U CN216751778U (en) | 2021-11-30 | 2021-11-30 | Clock synchronization system |
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| CN202122977411.4U CN216751778U (en) | 2021-11-30 | 2021-11-30 | Clock synchronization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890718A (en) * | 2024-03-15 | 2024-04-16 | 深圳市三行技术有限公司 | Remote monitoring system of frequency converter based on Internet of things technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890718A (en) * | 2024-03-15 | 2024-04-16 | 深圳市三行技术有限公司 | Remote monitoring system of frequency converter based on Internet of things technology |
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