CN103513586A - Frequency converter remote control method based on serial instruction sequence - Google Patents
Frequency converter remote control method based on serial instruction sequence Download PDFInfo
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- CN103513586A CN103513586A CN201210223999.7A CN201210223999A CN103513586A CN 103513586 A CN103513586 A CN 103513586A CN 201210223999 A CN201210223999 A CN 201210223999A CN 103513586 A CN103513586 A CN 103513586A
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Abstract
The invention discloses a frequency converter remote stepless speed regulation method based on a serial instruction sequence. The method can be applied to a remote host computer for stepless speed regulation of a frequency converter. According to the method, a queue is used for establishing a frequency set value sequence to make numerical values input by a panel generate a series of instructions sequentially and completely, and the instructions are sent to the frequency converter sequentially so as to realize remote stepless speed regulation. According to the scheme, a control host computer, control software, a communication bus and the frequency converter are included. The serial instruction sequence refers to frequency set values which are stored in a queue mode, wherein the frequency set values are sequentially output from the queue and then subjected to ASCII instruction coding to form a string of instruction sequences. According to the implementation scheme of the method, the control host computer 1, the control software 2, the communication bus 3 and the frequency converter 4 are included. By means of the frequency converter remote stepless speed regulation method based on the serial instruction sequence, remote stepless regulation of the frequency converter is realized in a serial port bus mode.
Description
Technical field
The present invention relates to a kind of frequency converter long-range control method based on serial command sequence.
Background technology
The remote of frequency converter adopts bus-control conventionally, at the manual target setting frequency of host computer sending controling instruction again, this mode of operation is applicable to gear speed governing, but often needs do frequency converter continuous fine adjustment in experimentation exploratoryly, be step-less adjustment, with upper type operation inconvenience.Remote stepless regulates controlling software design requirement higher because when regulating continuously, can exist the crawl of panel input numerical value less than or the capped problem of instruction, will be difficult to reach the effect of step-less adjustment.
Summary of the invention
A kind of frequency converter long-range control method based on serial command sequence providing in order to solve above-mentioned deficiency is provided, can on distance host, realizes the stepless speed regulation of frequency converter.
The technical solution adopted in the present invention comprises main control system, controls software, communication bus and frequency converter, concrete grammar is: utilize queue to build frequency setting value sequence, make the numerical value of panel input successively, intactly generate a series of instructions and sequentially be sent to frequency converter, realize remote stepless speed governing.
The described queue that utilizes builds frequency setting value sequence, refer in controlling software program design and adopt the producer/consumer Design Mode, in producer's circulation, the frequency numerical value of panel input was captured to queue by certain scan period, in consumer's circulation, the numerical value in queue is taken out successively by certain hour interval; Described serial command sequence, refers to the frequency setting value of storing in queue mode, carry out ASCII instruction encoding from queue is exported successively, forms a string instruction sequence.
Described main control system comprises communication interface, controls software and display screen; Described control software is realized the function that the speed-regulating instruction based on serial command sends; Described communication bus is serial communication bus; Described main control system is connected by communication bus with frequency converter.
Described certain scan period is that program captures from panel the time interval that data are sent into queue at every turn, according to whether carrying out speed governing operation, extends or shortens; Described whether carrying out speed governing operation and determined by the extent of twice circulation medium frequency setting value; Described certain time interval is that program sends the time interval of instruction at every turn to frequency converter, can at least be made as the frequency converter time delay stand-by period to add 300 milliseconds again.
Method flow is: program starts to carry out, circulation 1 judges whether to carry out manual adjustments, if carrying out manual adjustments, setting the input value scan period is that T1(T1 is about 0.5 second), if do not carrying out manual adjustments, the scan period of setting input value is T2(T2 > T1, be 3 ~ 5 seconds), then judge whether to arrive scanning constantly, if arrive scanning constantly, setpoint frequency value is sent into queue, otherwise without operation, continue to judge whether just in manual adjustments; Circulation 2 is asynchronous with circulation 1, first judge whether queue is empty, if queue is empty, without operating and continuing to judge whether queue is empty, if queue is not empty, reads a frequency setting value in queue, set up communication instruction, instruction is sent to frequency converter, through time delay, waits for after (300 ~ 600 milliseconds), continue execution and judge whether queue is empty operation.
Advantage of the present invention is that the frequency converter remote stepless of having realized under serial communication bus mode regulates.
Accompanying drawing explanation
Fig. 1 is the enforcement block diagram of the frequency converter long-range control method based on serial command sequence.
Fig. 2 is the programming flowchart of the frequency converter long-range control method based on serial command sequence.
Embodiment
The present invention is described in detail by the following examples and with reference to accompanying drawing.
Fig. 1 is the enforcement block diagram of the frequency converter long-range control method based on serial command sequence, and the present invention adopts main control system to be directly connected by serial communication bus with frequency converter.
Utilize queue to build frequency setting value sequence, make the numerical value of panel input successively, intactly generate a series of instructions and sequentially be sent to frequency converter, realize remote stepless speed governing.The described queue that utilizes builds frequency setting value sequence, refer in controlling software program design and adopt the producer/consumer Design Mode, in producer's circulation, the frequency numerical value of panel input was captured to queue by certain scan period, in consumer's circulation, the numerical value in queue is taken out successively by certain hour interval; Described serial command sequence, refers to the frequency setting value of storing in queue mode, carry out ASCII instruction encoding from queue is exported successively, forms a string instruction sequence; Described certain scan period is that program captures from panel the time interval that data are sent into queue at every turn, according to frequent operation degree, extends or shortens; Described certain time interval is that program sends the time interval of instruction at every turn to frequency converter, can equal the frequency converter time delay stand-by period to add 300 milliseconds again.
Shown in Fig. 2 is the programming flowchart of the frequency converter long-range control method based on serial command sequence, as shown in the figure.
Circulation 1: program starts to carry out, judge whether to carry out manual adjustments, if carrying out manual adjustments, setting the input value scan period is that T1(T1 is about 0.5 second), if do not carrying out manual adjustments, the scan period of setting input value is T2(T2 > T1, be 3 ~ 5 seconds), then judge whether to arrive scanning constantly, if arrive scanning constantly, setpoint frequency value is sent into queue, otherwise without operation, continue to judge whether just in manual adjustments.For example, when carrying out stepless speed regulation by 0Hz to 5Hz, detect numerical value in frequency input control and change, setting the scan period is short period T1, otherwise set the scan period, is long period T2.According to setting the scan period, carry out ensuing frequency values and obtain and send into queue.
Circulation 2: circulate 2 with circulation 1 for asynchronous.First judge whether queue is empty, if queue is empty, without operating and continuing to judge whether queue is empty, if queue is not empty, read a frequency setting value in queue, set up communication instruction, instruction is sent to frequency converter, through time delay, wait for after (300 ~ 600 milliseconds), continue execution and judge whether queue is empty operation.In queue, element is fallen out successively with the order of joining the team, and each goes out group element and sets up ASCII instruction, by serial ports write-in program, sends to frequency converter, and frequency converter can send and return to confirmation to Industry Control computer after receiving instruction, therefore needs time delay to wait for.
Claims (6)
1. the frequency converter long-range control method based on serial command sequence, can be applicable to the stepless speed regulation to frequency converter on distance host, comprise main control system, control software, communication bus and frequency converter, it is characterized in that, between main control system and frequency converter, adopt universal serial bus to be connected, by serial command sequence, control software and produce frequency setting value sequence, encoded rear transmission is also controlled frequency converter, realizes the remote stepless speed governing of frequency converter.
2. method according to claim 1, is characterized in that: control in software program design and utilize the producer/consumer Model Establishment procedural model.
3. method according to claim 1, it is characterized in that: the described queue that utilizes builds frequency setting value sequence, refer to and adopt the producer/consumer Design Mode, in producer's circulation, the frequency numerical value of panel input was captured to queue by the scan period, in consumer's circulation, the numerical value in queue was taken out successively by the time interval; Described serial command sequence, refers to the frequency setting value of storing in queue mode, carry out ASCII instruction encoding from queue is exported successively, forms a string instruction sequence.
4. method according to claim 1, is characterized in that: described control software is realized the function that the speed-regulating instruction based on serial command sends; Described communication bus is serial communication bus.
5. method according to claim 1, is characterized in that: the described scan period is that program captures from panel the time interval that data are sent into queue at every turn, according to whether carrying out speed governing operation, extends or shortens; Described whether carrying out speed governing operation and determined by the extent of twice circulation medium frequency setting value; Described certain time interval is that program sends the time interval of instruction at every turn to frequency converter, can at least be made as the frequency converter time delay stand-by period to add 300 milliseconds again.
6. method according to claim 1, is characterized in that:
Method flow is: program starts to carry out, and circulates 1 to judge whether to carry out manual adjustments, if carrying out manual adjustments, setting the input value scan period is T1, and T1 is about 0.5 second), if do not carrying out manual adjustments, the scan period of setting input value is T2, T2 > T1, T2 is 3 ~ 5 seconds, then judges whether to arrive scanning constantly, if arrive scanning constantly, setpoint frequency value is sent into queue, otherwise without operation, continue to judge whether just in manual adjustments; Circulation 2 is asynchronous with circulation 1, first judge whether queue is empty, if queue is empty, without operating and continuing to judge whether queue is empty, if queue is not empty, reads a frequency setting value in queue, set up communication instruction, instruction is sent to frequency converter, after time delay is waited for 300 ~ 600 milliseconds, continues execution and judge whether queue is empty operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210223999.7A CN103513586A (en) | 2012-06-29 | 2012-06-29 | Frequency converter remote control method based on serial instruction sequence |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210223999.7A CN103513586A (en) | 2012-06-29 | 2012-06-29 | Frequency converter remote control method based on serial instruction sequence |
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| CN103513586A true CN103513586A (en) | 2014-01-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6772257B1 (en) * | 1999-12-23 | 2004-08-03 | Intel Corporation | Method and apparatus for processing interrupts |
| US7395366B1 (en) * | 2002-09-27 | 2008-07-01 | Cypress Semiconductor Corp. | System, method, and apparatus for connecting USB peripherals at extended distances from a host computer |
| CN201690359U (en) * | 2010-06-07 | 2010-12-29 | 中国北车股份有限公司大连电力牵引研发中心 | Frequency converter remote controller for tram |
| CN202231603U (en) * | 2011-10-10 | 2012-05-23 | 常州苏控自动化设备有限公司 | Frequency converter |
| CN202231741U (en) * | 2011-09-21 | 2012-05-23 | 上海精星物流设备工程有限公司 | Frequency converter communication system |
-
2012
- 2012-06-29 CN CN201210223999.7A patent/CN103513586A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6772257B1 (en) * | 1999-12-23 | 2004-08-03 | Intel Corporation | Method and apparatus for processing interrupts |
| US7395366B1 (en) * | 2002-09-27 | 2008-07-01 | Cypress Semiconductor Corp. | System, method, and apparatus for connecting USB peripherals at extended distances from a host computer |
| CN201690359U (en) * | 2010-06-07 | 2010-12-29 | 中国北车股份有限公司大连电力牵引研发中心 | Frequency converter remote controller for tram |
| CN202231741U (en) * | 2011-09-21 | 2012-05-23 | 上海精星物流设备工程有限公司 | Frequency converter communication system |
| CN202231603U (en) * | 2011-10-10 | 2012-05-23 | 常州苏控自动化设备有限公司 | Frequency converter |
Non-Patent Citations (1)
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| 孙杨等: "基于LabVIEW的变频器监测控制系统设计", 《工业计量》 * |
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Application publication date: 20140115 |