CN2833670Y

CN2833670Y - Converter with built-in PLC frequency control

Info

Publication number: CN2833670Y
Application number: CN 200520110465
Authority: CN
Inventors: 黄泰璁; 温孝元; 卢永全
Original assignee: Delta Optoelectronics Inc
Current assignee: Delta Electronics Inc; Delta Optoelectronics Inc
Priority date: 2005-06-24
Filing date: 2005-06-24
Publication date: 2006-11-01
Anticipated expiration: 2015-06-24

Abstract

The utility model relates to a frequency converter with built-in PLC frequency control. Mainly, a programmable logic controller (PLC, Programmable Logic Controller) is integrated in a frequency converter, and as a consequence, the programmable logic controller directly controls an internal memory to output control signals so as to control the frequency converter to work without delay and noise. Meanwhile, the utility model is provided with a plurality of external terminals for the function setting and the connection of base pins, and the external terminals are used for matching and realizing the expansion and the control of the functions of the base pins through external program edition. As a consequence, the utility model solves the problems of fixing functions of the base pins, incapable expansion, complicated wire connection, etc.

Description

The frequency converter of built-in PLC frequency control

Technical field

The utility model relates to a kind of frequency converter of built-in PLC frequency control, be particularly related to and a kind of programmable logic controller (PLC) (PLC) be integrated in frequency converter inside, by the external program editor pin function is expanded frequency converter with the built-in PLC frequency control of control by the user.

Background technology

Frequency converter has been employed and has been disposed at the Electrical and Electronic product with motor device, as air-conditioning, refrigerator etc., as operation function control and reduction energy loss, yet, the work control of this frequency converter need be installed by interface connection and program editing and just can be finished, usually frequency converter is to be connected with programmable logic controller (PLC) (PLC) by outside terminal, as shown in Figure 1, moves control with the programming that cooperates programmable logic controller (PLC).

As everyone knows, the outside terminal of frequency converter is after program writes, and its function promptly is fixed up, and the interface control mode that is connected to form of itself and programmable logic controller (PLC) (PLC) comprising:

1. use analog input/output (Analog input/output) function pin, by input voltage or current signal control of conversion device, thereby but this mode is easy to generate the accuracy of noise influence control.

2. by digital I/O (Digital input/output) function pin, use multiterminal input (Multi-input) controlled frequency, yet be subjected to the restriction of available function number of pins, only have the output control of four kinds of fixed frequency kinds at present.

3. use communication (Communication) function pin, by communicating with PC, for example change frequency values by connected modes such as network, stube cables, yet so often for correspondence different communication mode and specification, must configure dedicated communicate to connect adapter, more serious problem is that the reaction velocity of communications is too slow.

In addition, traditional application programmable logic controller (PLC) (PLC) is connected control with the frequency converter outside terminal, inevitably has the cost of programmable logic controller (PLC) (PLC) and the problem of complicated line of acquiring.In addition, along with electronics industry be applied to that the fast development of motor device control technology and control function require complicated, use the connected mode of traditional frequency conversion device by outside terminal and programmable logic controller (PLC) (PLC), make the programmable logic controller (PLC) (PLC) and the outside terminal of this set function be difficult to mate fully, thereby make programmable logic controller (PLC) (PLC) can't cater to the need fully the control of frequency converter.For example, on control of conversion device halted state, the user can send an instruction out of service by computing machine, out of service by programmable logic controller (PLC) (PLC) control of conversion device, when frequency converter stops the back and restarts running, some user requires according to connection signal of sensor startup frequency converter, and makes it to continue operation with the running frequency (speed) before stopping.The user who also has requires the running frequency (speed) of frequency converter to make zero after stopping, and brings into operation according to the frequency of re-entering (speed).So, in the design that traditional frequency conversion device outside terminal function is fixed, can't satisfy the complicated demand of user's control function.

In addition, because frequency converter is by outside terminal and programmable logic controller (PLC) (PLC) when being connected, because there is wrong terminal pin unavoidably in the line of complexity, perhaps since the long-term problems such as the broken string that causes or loose contact of using of wiring turn round thereby influence frequency converter.

The utility model content

Fundamental purpose of the present utility model is to address the above problem, avoid the existence of problem, the utility model directly is built in programmable logic controller (PLC) (PLC) design of frequency converter inside, can make the user be easy to increase control function and simplify distribution, and can reduce cost and improve control efficiency according to demand for control.

To achieve these goals, the frequency converter of built-in PLC frequency control of the present utility model comprises: frequency converter; Be built in the programmable logic controller (PLC) (PLC) in the described frequency converter, described programmable logic controller (PLC) (PLC) is connected with frequency converter main body circuit by inner lead.

Brief description of drawings

Fig. 1 is traditional frequency converter and programmable logic controller (PLC) wiring configuration schematic diagram;

Fig. 2 is the block diagram of a specific embodiment of the present utility model;

In the accompanying drawing, the list of parts of each label representative is as follows:

Frequency converter 1 programmable logic controller (PLC) (PLC) 2

Frequency converter main body circuit 11 outside terminals 12

Wiring 13

Embodiment

About technology contents of the present utility model and detailed description, existing accompanying drawings is as follows:

Fig. 2 is the structure block diagram of the frequency converter of built-in PLC frequency control of the present utility model.As shown in the figure, the frequency converter of built-in PLC frequency control of the present utility model comprises: frequency converter 1 and the programmable logic controller (PLC) (PLC) 2 that is integrated in frequency converter 1 inside, programmable logic controller (PLC) (PLC) 2 is connected with frequency converter main body circuit 11 by back panel wiring 13, constituting the frequency converter 1 that includes programmable logic controller (PLC) (PLC) 2 in it, thereby provide cheap but practical frequency converter for the user with high control efficiency.

Frequency converter 1 comprises that having a plurality of pin functions that supply sets and the outside terminal 12 that is connected, as former function pins that is set in order to external programmable logic controller (PLC) (PLC) such as analog input/output, digital I/O, communications, it is separate and can carry out the pin function setting by the user by the external program editor according to demand, thereby expand use for other, connect artificial intelligence sensor (AI sensor) as utilizing analog input (Analog input) pin; Simulation output (Analogoutput) pin connects inverter (Inverter); Numeral input (Digital input) pin is set and is connected digital sensor (Digital sensor); Numeral output (Digital output) pin is set and is connected oil hydraulic cylinder (Cylinder), and (Communication) pin of can being communicated by letter by this is as communication setting, to connect another frequency converter of control or computing machine (PC) etc.

In other words, when the user sends frequency converter 1 instruction out of service by programmable logic controller (PLC) (PLC) 2, after instruction is made zero, if carry out making it to continue operation with the running frequency before stopping according to connection signal of sensor startup frequency converter 1, perhaps select according to controls such as the instruction frequency of re-entering bring into operation in the back of making zero, promptly can be by in the described outside terminal 12 one or more, carry out function setting as the analog input pin, load the described pin function of setting through the external program editor, when promptly starting frequency converter 1, sensor output signal continues operation with the running frequency before stopping, the back of perhaps making zero brings into operation according to the instruction frequency re-entered, thereby realizes being selected and set-up function as required by the user.

Utilize the external program editor to set analog input (Analog input) pin and connect sensor (sensor) to realize control function, set simulation output (Analog output) pin for selecting to continue the pin output of operation with the running frequency before stopping, can select to be set at numeral output (Digital output) pin with the output pin that the instruction frequency of re-entering brings into operation, thus, when sensor output signal, continue operation if will start frequency converter with the running frequency before stopping, promptly by simulation output (Analog output) pin output control signal, the back brings into operation with the instruction frequency of re-entering if will make zero, then by numeral output (Digital output) pin output control signal, realize thus selecting control action, thereby have the function of carrying out self establishment according to objective demand by the user.

Because the utility model is built in frequency converter 1 with programmable logic controller (PLC) (PLC) 2, directly the control internal storage is exported with 1 operation of control of conversion device, therefore with respect to traditional interface control that is external in programmable logic controller (PLC) (PLC) 2, it has the following advantages:

1, programmable logic controller (PLC) (PLC) 2 is built in frequency converter 1 and directly controls, and can avoid noise to problems such as the influence of precise control and delays.

2, can directly change frequency values, so there is not frequency band speed limit system problem by program editing.

3, not having the people is problems such as wiring carelessness, aging circuit and circuit loose contact.

4, assembly volume dwindles, cost reduces and do not have the distribution complicated problems.

In addition, after programmable logic controller (PLC) (PLC) 2 is integrated in frequency converter 1 inside, can again frequency converter 1 be integrated in central microprocessing unit (CPU) inside.

The above only is a preferred embodiment of the present utility model, be not so promptly limit claim of the present utility model, the equivalent structure transformation that every utilization the utility model instructions and accompanying drawing content are done, or directly or indirectly be used in other relevant technical field, all in like manner be included in the claim of the present utility model.

Claims

1. the frequency converter of a built-in PLC frequency control is characterized in that comprising following structure:

Frequency converter;

Be integrated in the programmable logic controller (PLC) (PLC) of described frequency converter inside;

Described programmable logic controller (PLC) (PLC) is connected with frequency converter main body circuit by back panel wiring.

2. the frequency converter of built-in PLC frequency control as claimed in claim 1, it is characterized in that, described frequency converter further comprises: having at least one can set and the outside terminal that is connected for pin function, to realize that by the external program editor expansion of pin function connects and control as required.

3. the frequency converter of built-in PLC frequency control as claimed in claim 2 is characterized in that, described outside terminal comprises that analog input/output, digital I/O and communication etc. can be according to the function pins of demand for control setting.

4. the frequency converter of built-in PLC frequency control as claimed in claim 1 is characterized in that, the described frequency converter that includes programmable logic controller (PLC) (PLC) in it can be integrated in central microprocessing unit inside.