JP2008108094A - Identification circuit and identification method of option substrate, and inverter device using them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To identify presence/absence and a kind of an option substrate to be connected through one signal. <P>SOLUTION: The presence/absence and the kinds of option substrates (101 and 111) are identified by connecting identification signal inputs of the option substrates (101 and 111) to an output port of a control microcomputer 113 through a fixed resistance 114, changing the voltage output from the output port of the control microcomputer 113, and detecting the identification signal inputs according to the state of the output port. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a method for identifying a plurality of option boards, and more particularly to an inverter device to which the identification method is applied.

Conventionally, as a method for identifying an option board, the management side device and the managed side option board are connected by a plurality of digital signals, and the ON / OFF of some signals is recognized by the management side, and the presence or absence of the option board is present. And the type are identified (see, for example, Patent Document 1).
FIG. 5 is a diagram for explaining an option substrate identification method disclosed in Patent Document 1. In FIG. In FIG. 5, reference numeral 501 denotes a management device on the management side, and reference numerals 512 and 513 denote option boards serving as managed devices controlled by the management device 501. The management device 501 includes a selection circuit 504 and a contact circuit 506, which are controlled by a control unit 503. In order for the management device 501 to identify the managed devices 512 and 513, the control unit 503 turns on and off the relays 509, 510, and 511 from the selection circuit 504 in a certain combination, and a contact detection circuit accordingly. Since the relay 508 of 502 is turned ON / OFF, the managed devices 512 and 513 are identified by detecting this state.
As described above, conventionally, as a method for identifying a plurality of option boards, a procedure for confirming the presence or absence of each option has been taken.
Japanese Patent Laid-Open No. 5-287181 (page 5-7, FIG. 1)

In the conventional method, the procedure for checking the presence / absence of each option board is assumed, so even if the signal of the selection circuit is coded to save wiring, multiple signals are output. There is a problem that the option board cannot be recognized unless it is prepared between the management device and the option board.
The present invention has been made in view of such a problem, and provides a method for reducing the wiring between signals between a management apparatus and an option board and identifying a plurality of option boards with a single signal. For the purpose.

In order to solve the above problem, the present invention is as follows.
The invention according to claim 1 is an option board identifying method for the management side apparatus to identify a plurality of types of option boards connected to the management side apparatus, wherein the output of the control circuit in the management side apparatus A first voltage value at the input port of the control circuit when a predetermined potential is sent from the port is stored in the control circuit, and a second voltage value at the input port when a GND potential is sent from the output port Is stored in the control circuit, and an option substrate identification method for identifying the presence or type of the option substrate according to the first and second voltage values is provided.
The invention according to claim 2 is an option board identification circuit for identifying a plurality of types of option boards connected to the management side apparatus by the management side apparatus. An input / output port connection circuit that connects the output port and the input port via a resistor; a first register that stores a first voltage value at the input port when a predetermined potential is sent from the output port; A second register for storing a second voltage value at the input port when a GND potential is sent from the output port, and the control circuit responds to the values of the first and second voltage values. And a control circuit for identifying the presence or absence or type of the option board.
According to a third aspect of the present invention, there is provided an option board management side device including the option board identification circuit according to the second aspect.
According to a fourth aspect of the present invention, in an inverter device comprising means for identifying a plurality of types of connected option boards, the inverter apparatus is provided in the inverter apparatus and transmits / receives signals to / from the option boards. A control circuit having an output port and an input port; and an input / output port connection circuit for connecting the output port and the input port via a resistor, wherein the control circuit sends a predetermined potential from the output port. The first voltage value at the input port at the time of storage is stored, the second voltage value at the input port when the GND potential is transmitted from the output port, and the first and second voltage values are stored. The inverter device identifies the presence or absence or type of the option board according to the value.
According to a fifth aspect of the present invention, the plurality of types of option boards are first and second option boards, and the first and second option boards are connected to the input / output port connection circuit. The inverter device according to claim 4, wherein a signal to be connected is connected to a GND potential or a predetermined voltage in these substrates.
According to a sixth aspect of the present invention, the input port further includes an A / D converter, and the third option board has a signal connected to the input / output port connection circuit within the board. When the first and second voltage values are potentials obtained by dividing the predetermined potential by the resistor and the voltage dividing resistor. 6. The inverter device according to claim 5, wherein the option board is identified as the third option board.

According to the present invention, a management-side device such as an inverter device can have a single signal for identifying an option board. In addition to providing an analog input port with an A / D converter at the input port to which the signal of the option board of the control circuit is input, and by providing a voltage dividing resistor on the option board side, the types of option boards that can be identified are maximized. Can be increased by the resolution of the analog input port.

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

  FIG. 1 is a block diagram showing a configuration of an inverter device to which the first method of the present invention is applied. In the figure, an inverter device 100 includes a detection unit including a voltage detection circuit 106, a current detection circuit 108, and a temperature detection circuit 112, an input circuit 115, an output circuit 116, an operator 117, an input / output port connection circuit 103, and an option data interface. Based on the information from the external input / output unit configured by the circuit 118, the motor 110 is driven by the control microcomputer 113 driving the power unit configured by the rectifier circuit 105 and the switching element 107 via the drive circuit 109. Is supposed to drive.

  In addition, there are a plurality of types of option boards connected to the inverter device 100 via the option board connection connector 102. Depending on the application, the fieldbus network connection option board 101 is connected to receive information from the host controller. The speed information from the PG encoder that detects the motor speed by connecting the PG encoder connection option board 111 is sent to the inverter 100 device.

  The fieldbus network connection option board 101 is configured to connect a signal to be connected to the input / output port connection circuit 103 to the VCC potential in the board in order to indicate what it is. Further, the PG encoder connection option board 111 has a signal connected to the input / output port connection circuit 103 connected to the GND potential. On the other hand, since the output port and the input port of the control microcomputer 113 are connected via the fixed resistor 114 in the input / output port connection circuit 103, when these option boards are connected, the potential of the output port of the control microcomputer 113 is set. Regardless, the potential of the input port is fixed, and if the option board is not connected, the same potential as that of the output port appears at the input port. The inverter device 100 and connection option power are supplied from the power supply circuit 104.

    FIG. 2 is a flowchart showing the processing procedure of the control microcomputer 113 for identifying the option board in the inverter device. The option board identification method of the present invention will be described in order with reference to this figure.

  First, in step 1, the VCC potential is output from the output port of the control microcomputer 113, and the potential of the input port at that time is stored in the register 1 of the control microcomputer 113. Here, when the option board is not connected, the potential is directly applied to the input port via the fixed resistor 114 of the input / output port connection circuit 103, and the register 1 = VCC. When the fieldbus network connection option board 101 is connected, the register 1 = VCC is set by the VCC potential directly connected to the input port on the fieldbus network connection option board 101. When the PG encoder connection option board 111 is connected, the GND potential is directly connected to the input port on the PG encoder connection option board. Therefore, the output port potential VCC and the input port GND potential are fixed resistors. Consumed, register 1 = GND.

  Next, in step 2, the GND potential is output from the output port of the control microcomputer 113, and the potential of the input port at that time is stored in the register 2 of the control microcomputer 113. Here, when the option board is not connected, the potential is directly applied to the input port via the fixed resistor 114, and the register 2 = GND. When the fieldbus network connection option board 101 is connected, the VCC potential directly connected to the input port in the fieldbus network connection option board 101 and the GND potential of the output port are consumed by the fixed resistor 114, and the register 2 = VCC. When the PG encoder connection option board 111 is connected, the register 2 = GND is set by the GND potential directly connected to the input port on the PG encoder connection option board 111.

  Finally, in step 3, the status of the register 1 and the register 2 is confirmed. If register 1 = VCC and register 2 = GND, it is determined that the option board is not connected. When register 1 = register 2 = VCC, it is determined that the fieldbus network connection option board 101 is connected. When register 1 = register 2 = GND, it is determined that the PG encoder connection option 111 is connected.

  In this way, since the potential of the input port is detected after the potential of the output port of the control microcomputer 113 is changed, the state where no potential is applied to the input port with one signal and the state where the potential is applied are determined. The plurality of option boards can be identified by the potential, and the state in which the option boards are not connected can also be identified.

  FIG. 3 is a block diagram showing the configuration of only the option board identification portion of the inverter device to which the second method of the present invention is applied. The difference from the first method is that the input port of the control microcomputer 113 is an A / D converter 303 so that an intermediate voltage can be detected, and the other option board which is a third option board. The inside of the connection option board 301 is connected to the GND potential via the option board identification circuit 103 and the voltage dividing resistor 302.

    FIG. 4 is a flowchart showing the processing procedure of the control microcomputer 113 for carrying out the second method of the present invention. The second method of the present invention will be described step by step with reference to this figure.

  First, in step 1, the VCC potential is output from the output port, and the potential of the input port at that time is A / D converted and stored in the register 1. Here, when the option board is not connected, when the fieldbus network connection option board 101 is connected, and when the PG encoder connection option board 111 is connected, the register 1 is the same as in the first method. Saved in. When the other connection option board 301 is connected, the potential obtained by dividing the VCC potential from the output port by the fixed resistor 114 of the input / output port connection circuit 103 and the voltage dividing resistor 302 of the other connection option board 301. However, since the A / D input 303 is applied, the value of the register 1 is fixed to an intermediate potential between VCC and GND.

  Next, in step 2, the GND potential is output from the output port, and the potential of the input port at that time is A / D converted and stored in the register 2. In this case, since the potentials at both ends of the voltage dividing resistor 302 of the option board 301 are all set to GND, the A / D input 303 is set to the GND potential as in the case where the PG encoder connection option is connected. When the option board is not connected, when the fieldbus network connection option board 101 is connected, and when the PG encoder connection option board 111 is connected, it is stored in the register 2 as in the first method. . .

  Finally, in step 3, the values of register 1 and register 2 are confirmed in the same manner as in the first method. In addition to the determination conditions of the first method, register 1 = register 2 and the VCC potential from the output port is When the potential is divided by the fixed resistor 114 of the input / output port connection circuit 103 and the voltage dividing resistor 302 of the other connection option board 301, it is determined that the other connection option board 301 is connected.

  In this way, in addition to the first method, by providing a voltage dividing resistor on the connection option board, it is possible to identify more connection option boards by the resistance value of the voltage dividing resistor.

The block diagram which shows the structure of the inverter apparatus to which the 1st option board | substrate discrimination | determination method of this invention is applied. The flowchart which shows the process sequence of the 1st option board | substrate discrimination | determination method of this invention. The block diagram which shows the structure of the option board identification part of the inverter apparatus to which the 2nd option board discrimination method of this invention is applied. The flowchart which shows the process sequence of the 2nd option board | substrate discrimination | determination method of this invention. Block diagram showing the configuration of an optional board identification portion to which a conventional option board identification method is applied

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Inverter apparatus 101 Fieldbus network connection option board 102 Option board connection connector 103 Input / output port connection circuit 104 Power supply circuit 105 Rectifier circuit 106 Voltage detection circuit 107 Switching element 108 Current detection circuit 109 Drive circuit 110 Motor 111 PG encoder connection option board 112 Temperature detection circuit 113 Control microcomputer 114 Fixed resistor 115 Input circuit 116 Output circuit 117 Operator 118 Option data interface circuit 301 Other connection option board 302 Voltage dividing resistor 303 A / D converter 501 Management circuit 502 Contact detection circuit 503 Control unit 504 selection Circuit 505 Power supply 506 Contact circuit 508, 509, 510, 511 Relay 512, 513 Managed circuit

Claims (6)

In the option board identification method for the management side apparatus to identify a plurality of types of option boards connected to the management side apparatus,
The first voltage value at the input port of the control circuit when a predetermined potential is sent from the output port of the control circuit in the management side device is stored in the control circuit,
Storing the second voltage value at the input port when the GND potential is sent from the output port by the control circuit;
An option board identifying method, wherein the presence or absence or type of the option board is identified according to the first and second voltage values. In an option board identification circuit for the management side apparatus to identify a plurality of types of option boards connected to the management side apparatus,
An input / output port connection circuit for connecting the output port and the input port of the control circuit in the management device via a resistor;
A first register for storing a first voltage value at the input port when a predetermined potential is sent from the output port;
A second register for storing a second voltage value at the input port when a GND potential is sent from the output port;
An option board identification circuit comprising: a control circuit for identifying the presence or type of the option board according to the first and second voltage values.   An option board management side device comprising the option board identification circuit according to claim 2. In an inverter device provided with means for identifying a plurality of types of connected option boards,
A control circuit provided in the inverter device and provided with an output and an input port for transmitting and receiving signals to and from the option board;
An input / output port connection circuit for connecting the output port and the input port via a resistor,
The control circuit stores a first voltage value at the input port when a predetermined potential is sent from the output port, and a second voltage value at the input port when a GND potential is sent from the output port And the presence or type of the option board is identified according to the first and second voltage values. The plurality of types of option boards are first and second option boards,
The first and second option boards are characterized in that a signal connected to the input / output port connection circuit is connected to a GND potential or a predetermined voltage in these boards. The inverter device according to claim 4. The input port further includes an A / D converter,
In the third option board, a signal connected to the input / output port connection circuit is connected to the GND potential through a predetermined voltage dividing resistor in the board.
When the first and second voltage values are potentials obtained by dividing the predetermined potential by the resistor and the voltage dividing resistor, the option board is the third option board. 6. The inverter device according to claim 5, wherein the inverter device is identified.

Images