JP2008178236A - Inverter device and programming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inverter device having a visual programming function capable of performing a master / slave operation without using a PLC and its programming device.
An execution code consisting of a power control unit including a power supply unit and a power conversion unit, and an application unit and a motor control unit that can be customized by connecting a combination of a plurality of pre-installed execution code, function, and block with parameters. Inverters composed of a control unit composed of a CPU and a CPU that executes the execution code, and an external communication interface unit, input and output of a plurality of inverters having the same function are connected by communication, and each inverter Are assigned as a master and a slave.
[Selection] Figure 2

Description

  The present invention relates to a simple master / slave function of an inverter that can be easily customized with high quality by an application unit.

FIG. 5 is a schematic system configuration diagram using a plurality of inverters in the prior art. In the figure, 101 is a program logic controller (hereinafter referred to as PLC), 102 is a serial transmission cable, 103, 105 and 107 are inverters, and 104, 106 and 108 are communication option cards.
In a small-scale system using a plurality of conventional inverters, an expensive PLC device (101) is prepared as a higher-level program logic controller (PLC) as shown in FIG. It was necessary to prepare a card (104) and to operate each inverter by assembling a program with a host controller (hereinafter referred to as Prior Art 1). For this reason, each inverter has a communication function and can be operated easily and inexpensively by connecting to each other via a communication line and transmitting information necessary for inverter tuned operation, ratio operation, etc. from the master to the slave. There is also a method (see, for example, Patent Document 1).
However, this prior art 1 is specialized in synchronization and tuning operation, and reading data from a slave is impossible, and there is a problem that it is not highly customizable using a PLC and lacks versatility. is there.

As another conventional technique, a technique (Patent Document 2) that can customize a program by combining function blocks prepared in advance is shown in FIGS. 6 to 11 (hereinafter referred to as Conventional technique 2). In order to make it easy to understand, an application in which an analog input 1 (101) and an analog input 2 (102) are added by an adder (109) to create a frequency command (113) will be described in detail below.
First, as shown in the upper side of FIG. 6, the source code of the application is created using the programming device (1120). That is, the function blocks of analog input 1 (101), analog input 2 (102), adder (109), and frequency command (113) are arranged on the screen of the programming device (1120), and they are connected by connection lines. The source code is created by connecting.

This source code is compiled (122), and information about an execution code module to be executed and its execution order is generated as a connection information table (114).
That is, the connection constant No. in this connection information table (114). The constant number in this column represents the execution order, and the terminal number column as a set value of the constant is set with a unique terminal number possessed by each function block.
In the inverter, this terminal number and the execution code module of the corresponding function block are associated in the execution code module table (124), so the execution code module is determined from the terminal number. become.
Since the execution code of each function block is incorporated in the inverter in advance, it is not necessary to download it again.

The connection information table (114) of the present technology will be specifically described.
The output terminal number 01 (103) of the analog input 1 (101) is set to the connection constant 1 of the input information of the connection line 1 (105), and is also added to the connection constant 2 of the output information of the connection line 1 (105). The input 1 terminal number 03 (107) of the device (109) is set. Next, the output terminal number 02 (104) of the analog input A2 (102) is set to the connection constant 3 of the input information of the connection line 2 (106), and the connection constant 4 of the output information of the connection line 2 (106) is also set. Is set to the input terminal 2 terminal number 04 (108) of the adder (109). Finally, the output terminal number 05 (110) of the adder (109) is set to the connection constant 5 of the input information of the connection line 3 (111), and the frequency is set to the connection constant 6 of the output information of the connection line 3 (111). The input terminal number 06 (112) of the command (113) is set.

The connection information is downloaded to the inverter (1100) via communication (123) such as RS232C, and set in the JUMP table (115) existing in the application unit (1104).
The execution code for performing the actual processing of the analog input 1 (101), the analog input 2 (102), the adder (109), and the frequency command (113) is in the form corresponding to the terminal numbers of the inverters. Since it is pre-installed in the application section (1104) of (1100), there is no need to newly download.
The connection information table (114) and the JUMP table (115) are names in the programming device (1120) and the inverter (1100), respectively, and are different from each other but have the same contents.

Next, execution of the application unit (1104) in the inverter (1100) will be described.
The application unit (1104) of the inverter (1100) is executed based on the JUMP table (115). As shown in the lower side of FIG. It is executed in the order.
In other words, an execution code module corresponding to the terminal number set in the connection constant No. of the JUMP table (115) is selected by searching the execution code module table (124), and is executed.

Processing corresponding to the terminal number of the JUMP table (115) will be described in order from the top.
A1 (116): In this process, the data of the analog input 1 function block (101) is stored in the work ram for delivery.
+ Input 1 (117): The contents of the previously stored work ram are stored in the input 1 work ram of the adder function block 109 connected to.
A2 (118): In this process, the data of the analog input 2 function block (102) is stored in the work ram for delivery.
+ Input 2 (119): The contents of the previously stored work ram are stored in the input 2 work ram of the adder function block (109) at the connection destination.
Add (120): In this processing, a value obtained by adding the contents of the work rams of the input 1 and the input 2 of the adder function block (109) to the work ram for delivery is stored.
Frequency command (121): The contents of the previously stored workram are stored in the frequency command function block (113). The output of the frequency command (113) is input to the motor control unit (1105) in FIG.
In this way, it is possible to easily realize a custom response with a high degree of freedom with stable quality.

Next, a description will be given of an example of creating a simple pattern driving application as shown in FIG.
In order to perform the pattern operation according to the operation frequency indicated by the solid line in the time chart of FIG. 7, it is necessary to give a frequency command indicated by the broken line to the motor control unit (1105). In order to generate such a frequency command, first, a function block diagram as shown in FIG. 8 is created as a source code of an application using a programming device (1120).

  S1 (300) is a digital input terminal 1 function block of an inverter (1100), INTVL TMR (301) is a logic interval timer function block, NOT (302) is a logic NOT operation function block, AND (303, 304) Is a logic AND operation function block, FwdCMD (305) is a forward operation command function block that outputs a forward operation command to the motor control unit (1105), and RevCMD (306) is a reverse operation command to the motor control unit (1105). Reverse operation command function block that outputs, Q1-01 (307) is a constant input function block 1 that inputs set values by constants, and Q1-02 (308) is a constant input function block that inputs set values by constants 2, NUMS (309) is a 2-input to select two numerical inputs Select value function block, FreqCMD (310) has a frequency reference function block for outputting a frequency command to the motor control unit (1105).

  As shown in FIG. 9, these function blocks are prepared in the Tab (407 to 411) as standard function blocks that can be used for various models and applications and that can understand the functions visually. In addition, the execution code corresponding to each function block is fully tested and is incorporated in the application unit (1104) in the inverter (1100) in advance.

When creating the source code, the function block can be dragged from the above-mentioned TAB in the programming device (1120) and dropped at an arbitrary position on the program page of the screen.
After placing the function block on the screen, you can connect to other function blocks by clicking the terminal part. Terminals can be identified by logic, real values, or their types by symbols, and cannot be connected even if different types of terminals are connected.
Some connections are not functionally possible, but they are displayed as errors during compilation. For example, as shown in FIG. 11, if a digital input terminal 2 function block called terminal input S2 (601) is added to an existing page, and compilation is performed without connecting to any other function block, the compilation result is output. A window (602) shows the error contents and the number of errors, and the compilation is finished. The compilation result output window (602) appears on the screen at the start of compilation.

  Information (constant, name, etc.) of each function block is displayed in the property (504) of FIG. 10 in a state selected by clicking, and can be edited. In the example of FIG. 10, it is displayed in the property (504) of the forward rotation frequency command function block (512), the ID number is “8”, the label is “forward rotation frequency command”, and the user constant 2 is “50”. .0 ".

Also, the application source code on this page can be stored as a project in a folder displayed in the project window (503) as shown in FIG.
Similarly, a new page can be created in the subroutine folder (507) of the project window (503) in FIG. 10 to create a new subroutine. The function block diagram created here can be selected and used as a subroutine function block from the subroutine tab (412) of the function block tab window of FIG.

  As the program capacity limit, there is an upper limit on the number of connection information, that is, the number of rows in the connection information table (114). In order to inform the usage status, the upper limit is set to 100% and the memory usage rate of the current connection information is set. % Is displayed in the memory usage rate display (509) at the bottom of the screen of FIG. In this display, the number of connection information in use may be directly displayed, or the number of connection information that can be used may be displayed in% or the number thereof may be directly displayed.

  In order to show whether the programming device (1120) and the inverter (1100) can communicate with each other, for example, in blue / red, the programming device (1120) and the inverter (1100) main body are connected / not connected in the lower right of the screen of FIG. The status (510) is displayed.

  The processing time occupation rate monitor (511) is displayed at the bottom center of the screen in FIG. 10 as to how much of the processing time of the application unit (1104) occupies the entire processing time available to the CPU (1102). When the inverter (1100) is not connected to the main unit (offline), the sum of the estimated processing time of the selected function block is divided by the total processing time available to the CPU (1102) and displayed. In the case of (online), the actual value of the inverter (1100) is read and displayed.

The output terminal of the S1 function block (300) in FIG. 8 is displayed as if it were a logic output terminal (313). This can be connected to the logic input terminal (314) as an input of the interval timer (301), but cannot be connected to the numerical input terminal.
Similarly, the output of Q1-02 (308) is a numerical output terminal (315), which can be connected to the input terminal (316) of the binary input selector (309) which is a numerical input terminal, and is connected to the logic input terminal. Cannot be connected.

Next, the operation of FIG. 8 will be described.
S1 (300) is the input terminal 1 of the inverter (1100), which is used as a pattern operation start command. When the input terminal command is closed, the output of S1 (300) becomes True “1”, and the operation command rises as shown in FIG.
This output signal is input to AND (303, 304) and INTVL TMR (301). When INTVL TMR (301) is input, a timer operates and repeats ON / OFF accordingly. This output signal enters the AND circuit (303, 304) together with the output signal of S1 (300), and is input to the forward rotation command (305) and the reverse rotation command (306), respectively. The ON time constant and the OFF time constant can be set or referred to by the property (504) on the right side of the screen in FIG.

Further, the output from the INTVL TMR (301) and the constants (307, 308) are respectively input to the NUMS (309) as the forward rotation command / reverse rotation command, and the NUMS (309) is turned on / off by the output of the INTVL TMR (301). Is switched as a forward rotation frequency command (307) / reverse rotation frequency command (308), and is input to the frequency command (310) as a final frequency command.
The outputs of the forward rotation command (305), the reverse rotation command (306), and the frequency command (310) are input to the motor control unit (1105) in FIG. 6, and the operation shown by the operation frequency in FIG. 7 is realized. The

  As described above, the source code of the application is converted into connection information on the programming device (1120) and downloaded to the inverter (1100) via the communication interface (1111). In the inverter (1100), only the execution code corresponding to the function block selected by the connection information is executed by the mechanism already described, and the application expressed in the function block diagram on the screen of the programming device (1120) is displayed. Executed. Thus, since the execution code of the application unit is executed only when it is selected, waste of processing time in the CPU (1102) is reduced. The above is the description of the prior art 2.

Moreover, in the prior art 2, the application part can be customized easily and with high quality, and there was input / output by communication, but the master / slave function could not be assigned. Could not be used.
Japanese Patent No. 2883643 World Intellectual Property Organization International Secretariat International Publication No. 2006/112324 Pamphlet

The small-scale system using a plurality of units in the prior art 1 requires a PLC, a communication option card, etc. and is expensive, and therefore there is a simple system that does not require it, but it is limited to synchronous operation and synchronous operation. It did not replace the function.
Further, the prior art 2 has a problem that it cannot be used systematically because there is no master / slave assignment.
The present invention has been made to solve such problems, and an object of the present invention is to provide an inverter device having a visual programming function capable of master / slave operation without using a PLC and a programming device thereof. It is to provide.

In order to solve the above problem, the present invention is as follows.
The present invention includes a power unit including a power conversion unit, an application unit that can be customized by connecting a combination of a plurality of pre-installed execution code, function, and block with parameters, an execution code unit including a motor control unit, In a plurality of inverters composed of a control unit consisting of a CPU that executes the execution code and a communication interface unit with the outside, means were taken so that one of them could be assigned as a master and the other as a slave is there.
In addition, the output function block of the inverter assigned as the master can regularly transmit to other inverters through communication.
In addition, a means was adopted in which input function blocks of a plurality of inverters assigned as slaves can be received through communication.
In addition, the inverter input function block assigned as the master can periodically monitor other inverters through communication.
In addition, the output function blocks of a plurality of inverters assigned as slaves take a means that data can be provided to the master through communication.

  According to the present invention, a small-scale system can be realized without using an expensive PLC or communication option card. Further, according to the present invention, the inverter assigned as the master can periodically transmit data to other inverters through communication. According to the present invention, input function blocks of a plurality of inverters assigned as slaves can receive data from the master through communication, or can process the data after receiving the data and move it as a command. According to the present invention, an input function block of an inverter assigned as a master can periodically monitor another inverter through communication. According to the present invention, output function blocks of a plurality of inverters assigned as slaves can provide data to the master through communication.

  Hereinafter, specific examples of the method of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic system configuration diagram using a plurality of inverters according to the present invention. In the figure, 201 is a serial transmission cable, 202 is an inverter (master), 203 is a main body communication port (external terminal), 204 is an inverter (slave 1), and 205 is an inverter (slave 2). The main body communication port (203) is composed of a communication terminal or connector directly mounted on the inverter main body. On the other hand, the communication option card is connected to an optional connector on the inverter body and communicates with the external device that is uniquely held on the option board or from a CPU, memory, or communication driver that controls the function as a PLC. Composed. Therefore, the main body communication port (203) is very inexpensive compared with the communication option card.
As described above, by simply connecting serial communication to a plurality of inverter main bodies, it is possible to realize a system operation using a simple master / slave function without arranging a PLC as a host controller and an expensive communication option card.

FIG. 2 is a system configuration diagram using the simple master / slave function of FIG. Each of the plurality of inverters includes an inverter master (301), an inverter slave 1 (319), and an inverter slave 2 (324) set by parameters. Further, in the conventional technique 2 having an application part for each inverter, the application part can be easily customized with high quality. Although two inverters and slaves will be described, three or more inverters and slaves can be similarly applied.
The inverter master (301) is a program for creating a frequency command (311) and a program for creating an operation command (313) in the application section program (302), a program (315) for creating an external abnormality, and a multi-function contact output (316). Have a program to create). The multi-function contact is a contact that functions to input a speed command and a logic command from the outside of the inverter device and to output monitor information and alarm information to the outside.
First, the configuration of the frequency command will be described. First, the main body analog inputs AI1 (303) and AI2 (304) are added. The numerical data read CON2R (305) by communication is subtracted from the sum of these. At this time, CON2R (305) becomes the AI1 main body analog input of the inverter / slave 1 and the numerical data read value from CON2W. This result is set in the frequency command (311), and at the same time, the numerical data is written by CON1W (314) communication. This value is read by the inverter slave 1 (319) by reading the numerical data by CON1R (320) communication of the inverter / slave. The frequency command of the inverter slave 2 (324) is used.
Next, as the operation command, the main body contact input DI1 (306) is directly input to the operation command (313). At the same time, the bit data write COL1W (314) by communication is written. This bit data becomes an operation command via the CON1R (320) in the inverter / slave 1 (319) and the inverter / slave 2 (324).
The external abnormality (315) of the main body is set by data read from the bit data read COL2R (307) by communication. This data is data set by the COL2W (323) of the inverter / slave 1, that is, the input value of the multi-function terminal input DI1 of the inverter / slave 1.
The multi-function contact output DO1 (316) of the inverter master (301) outputs a bit data read COL3R (308) by communication, which is a bit data write value COL3W (325) by communication of the inverter slave 2 (324). ), That is, the multi-function terminal input DI1 of the inverter slave 2 (324).

FIG. 3 shows a numerical data write function block CON1W (312) by communication of FIG. 2, a numerical data read function block CON1R (320) by communication, a bit data read function block COL1W (314) by communication, and a bit data read by communication (315). It is a detailed description of COL1R (321).
Each of these function blocks performs writing or reading transmission / reception processing according to the set condition in the inverter set as the master, but in the slaves 1 and 2, the data is transferred to the predetermined communication work as before. Just write or read communication data.
The left square in FIG. 3 is a function block. Each of these function blocks has a connection terminal, and by connecting them, a block diagram is created on the editing software on the PC. It is converted into constant settings and set as constant information in the inverter, which supports various applications.

  A numerical data write function block CON1W (401) by communication will be described. This function block has two terminals. Reference numeral (402) denotes an input signal for determining the timing of writing numerical data. (403) is a setting input terminal for numerical data to be set. On the right is the property table (404). From here, the write timing mode (set time or external signal) or time is determined. These are set as constants, and are set and stored in the inverter. It can be edited with editing software on a PC.

  A numerical data read function block CON1R (405) by communication will be described. This function block also has two terminals. Reference numeral (406) denotes an input signal that determines the timing of reading numerical data. Reference numeral (407) denotes an output terminal for reading numerical data. On the right is the property table (408). A bit data read function block COL1W (409) by communication for determining the read timing mode (either set time or external signal) or the time will be described. This function block has two terminals. (410) is an input signal for determining the timing of writing bit data. (411) is a setting input terminal for bit data to be set. On the right is the property table (412). From here, the write timing mode (set time or external signal) or time is determined.

The bit data read function block COL1R (413) by communication will be described. This function block also has two terminals. (414) is an input signal for determining the timing of reading bit data. (415) is an output terminal for reading bit data. To the right is the property table (416). From here, the read timing mode (set time or external signal) or time is determined.
Either the set time or the external signal can be selected as the write timing or read timing.

  FIG. 12 is an explanatory diagram of write / read timings when a set time is selected for a function block for writing or reading data by communication. When writing / reading mode is set time. The data of the station address set by the master is written or read every time set as in 417.

FIG. 13 is an explanatory diagram of write / read timing when an external signal is selected for a function block for writing or reading data by communication.
When an external input signal is used, station address data set by the master is written or read by the external input signal regardless of the time.

  The present invention solves the problems of complexity and cost in a conventional system using a plurality of inverters such as a PLC and a communication option card, and provides a simple and inexpensive system.

System schematic configuration diagram using a plurality of inverters according to the present invention Details of system configuration diagram using multiple inverters Detailed block diagram of data write / read function via communication General configuration of inverter System schematic diagram using multiple conventional inverters Function block diagram and processing flow of conventional technology 2 Time chart of conventional technology 2 Function block diagram of conventional technology 2 Configuration of function block tab screen of conventional technology 2 Screen example of programming device of conventional technology 2 Compile error screen display of conventional technology 2 Explanatory diagram of write / read timing when setting time is selected according to the present invention Explanatory diagram of write / read timing when external signal is selected according to the present invention

Explanation of symbols

101 PLC (external controller)
102 Serial transmission 103, 105, 107 Inverter unit 104, 106, 108 Communication option card 201 Serial transmission 202 Inverter unit 203 Main unit communication port (external terminal)
204 Inverter (Slave 1)
205 Inverter (slave 2)
301 Inverter unit (master)
302 Software (application part)
303 AI1 (Function block: Analog input 1)
304 AI2 (Function block: Analog input 2)
305 CON1R (Function block: Reading numerical data by communication)
306 DI1 (Function block: Multi-function contact input.
307 COL2R (Function block: Read bit data by communication)
308 COL3R (Function block: Read bit data by communication)
309 Adder (Function block: Data adder)
310 Subtractor (Function block: Data subtractor)
311 Frequency command (function block: frequency command)
312 CON1W (Function block: Numeric data writing by communication)
313 Operation command (Function block: Operation command)
314 COL1W (Function block: Write bit data by communication)
315 External error (function block: external error)
316 DO1 (Function block: Multi-function contact output)
317 Serial transmission port 318 Serial transmission 319 Inverter unit (slave 1)
320 CON1R (Function block: Reading numerical data by communication)
321 COL1R (Function block: Read bit data by communication)
322 CON2W (Function block: Write numerical data by communication)
323 COL2W (Function block: Write bit data by communication)
324 Inverter unit (slave 2)
325 COL3W (Function block: Write bit data by communication)
401 Function block: Write numerical data by communication 402 External write signal terminal 403 Write numerical data input terminal 404 Numerical data write function block property 405 Function block: Read numerical data by communication 406 External read signal terminal 407 Read numerical data output terminal 408 Numerical value Data read function block / property 409 Function block: Write bit data via communication 410 External write signal terminal 411 Write bit data input terminal 412 Bit data write function block / property 413 Function block: Read bit data via communication 414 External read signal terminal 415 Read Bit data output terminal 416 Data read function block property 417 Write / read timing (when set time is selected)
418 Write / read timing (when external input is selected)
501 Inverter 502 Control unit 503 CPU
504 Execution code unit 505 Application unit 506 Motor control unit 507 Power unit 508 Power source unit 509 Power conversion unit 510 AC power source 511 Electric motor 512 Communication interface unit (I / F unit)
513 Programming device

Claims (11)

Execution of the execution part and the execution code part which consists of the power part which consists of the power conversion part, the application part and the motor control part which can be customized by connecting the combination of plural execution codes, functions and blocks built in beforehand with parameters. In a plurality of inverters composed of a control unit consisting of a CPU and a communication interface unit with the outside,
A data write function block that consists of an external write signal terminal and write data input terminal, and writes data by communication, and one external read signal terminal. And a data read function block for reading data by communication.   2. The inverter device according to claim 1, wherein the output function block of the master inverter periodically transmits data to the slave inverter through communication.   2. The inverter device according to claim 1, wherein the input function block of the slave inverter receives data from the master inverter through communication, or processes the data after receiving the data and operates as a command.   2. The inverter device according to claim 1, wherein the input function block of the master inverter periodically monitors the slave inverter through communication.   2. The inverter device according to claim 1, wherein the output function block of the slave inverter provides data to the master inverter through communication.   2. The inverter device according to claim 1, wherein the write data of the data write function block is numeric data or bit data.   2. The inverter device according to claim 1, wherein the read data of the data read function block is numeric data or bit data.   2. The inverter device according to claim 1, wherein the data write function block includes an address setting unit for identifying the inverter and a write timing setting unit for writing data for each set time or external signal.   2. The inverter device according to claim 1, wherein the data read function block includes an address setting unit for identifying the inverter and a read timing setting unit for reading data for each set time or external signal.   The master inverter (301) includes a program for creating a frequency command (311) and a program for creating an operation command (313) in an application section program (302), a program for creating an external abnormality (315), and a multi-function contact output (316). The inverter device according to claim 1, further comprising: A power block composed of a power conversion unit, an execution code unit composed of an application unit and a motor control unit, a control unit composed of a CPU that executes the execution code, and a communication interface unit with the outside. In a programming device that creates application source code from a connection line that connects and generates the connection information,
The function block is a function block corresponding to the execution code module incorporated in advance in the inverter or a function block newly created by combining the function block and the connection line, and the connection information is: A programming device comprising: a data write function block for downloading data by communication; and a data read function block for reading data by communication, wherein the function block is downloaded to the inverter via the communication interface unit. .

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