WO2022153559A1 - Io unit and end unit - Google Patents

Io unit and end unit Download PDF

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Publication number
WO2022153559A1
WO2022153559A1 PCT/JP2021/008764 JP2021008764W WO2022153559A1 WO 2022153559 A1 WO2022153559 A1 WO 2022153559A1 JP 2021008764 W JP2021008764 W JP 2021008764W WO 2022153559 A1 WO2022153559 A1 WO 2022153559A1
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WIPO (PCT)
Prior art keywords
unit
power
power supply
supply line
supplied
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PCT/JP2021/008764
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French (fr)
Japanese (ja)
Inventor
亮平 吉岡
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オムロン株式会社
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Publication of WO2022153559A1 publication Critical patent/WO2022153559A1/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Definitions

  • the present invention relates to an IO unit and an end unit.
  • Patent Document 1 discloses a PLC device including a bus interface, a bus function register, and a bus failure diagnosis register on an end cover.
  • Patent Document 2 discloses a remote I / O unit including an overcurrent detecting means for detecting an overcurrent in a power supply line that supplies electric power to an externally connected device.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2011-070284
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2009-909002
  • the PLC device described in Patent Document 1 diagnoses a bus failure, and does not monitor the power supply status to the externally connected device.
  • the remote IO unit described in Patent Document 2 the electric power for the internal circuit and the electric power for the externally connected device are supplied from the same external power source. Therefore, when the voltage drop of the external power supply occurs due to multiple connections of IO units or poor contact between IO units, sufficient power is not supplied to the internal circuit including the overcurrent detecting means, and the detection operation by the overcurrent detecting means May not be possible. That is, the remote IO unit described in Patent Document 2 cannot detect the voltage drop of the IO power supply.
  • One aspect of the present invention has been made in view of the above problems, and an object of the present invention is to provide an IO unit system capable of appropriately detecting an abnormality in an IO power supply state.
  • the IO unit is attached to a first power input terminal that receives first power from another connected IO unit and a device connected to the power port.
  • the first power is supplied to the power supply line by measuring the voltage of the power supply port for supplying the first power, the power supply line connecting the first power supply terminal and the power supply port, and the power supply line. It is equipped with a monitoring unit that monitors whether or not it is present.
  • the end unit is an end unit connected to the terminal side of a plurality of IO units connected to each other, and is attached to a device connected to the IO unit.
  • an IO unit system capable of appropriately detecting an abnormality in the supply state of IO power is provided.
  • the present embodiment an embodiment according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described with reference to the drawings.
  • the embodiments described below are merely examples of the present invention in all respects. Needless to say, various improvements and modifications can be made without departing from the scope of the present invention. That is, in carrying out the present invention, a specific configuration according to the embodiment may be appropriately adopted.
  • FIG. 1 is a schematic diagram showing a schematic configuration of the IO unit system 1.
  • the IO unit system 1 includes a communication coupler unit 10, a plurality of IO units 20, and an end unit 30.
  • the communication coupler unit 10 is connected to a higher-level master device via a network.
  • the IO unit system 1 performs predetermined input / output control on an externally connected device (device).
  • the communication coupler unit 10 receives a start instruction to start power supply from the master device (not shown).
  • the IO unit system 1 may include a PLC (Programmable Logic Controller) unit which is a master device instead of the communication coupler unit 10.
  • the communication coupler unit 10 includes a communication unit (not shown) for exchanging data with the master device, a power terminal block 11, and a connector 12.
  • the power terminal block 11 is provided with an IO power supply terminal 111 connected to the external IO power supply 2 and a unit power supply terminal 112 connected to the external unit power supply 3.
  • the connector 12 is provided with an IO power output terminal 121, a unit power output terminal 122, and a communication terminal (not shown).
  • the IO power supply terminal 111 is connected to the IO power output terminal 121 by the IO power supply line 4 (first power supply line). Further, inside the communication coupler unit 10, the unit power supply terminal 112 is connected to the internal power supply circuit 13 and the unit power output terminal 122 via the bus power supply circuit 15. The internal power supply circuit 13 is connected to the internal circuit 14 of the communication coupler unit 10. Further, inside the communication coupler unit 10, the communication unit is connected to the communication terminal of the connector 12 by a communication line (not shown).
  • Each of the plurality of IO units 20 includes a terminal block 21, an upper connector 22, and a lower connector 23.
  • the upper connector 22 and the lower connector 23 are provided on both side surfaces of the IO unit 20 (see FIG. 2).
  • the terminal block 21 is provided with a plurality of power supply ports 211 connected to externally connected devices.
  • the upper connector 22 is provided with an IO power input terminal 221 (first power input terminal), a unit power input terminal 222 (second power input terminal), and a communication terminal (not shown).
  • the lower connector 23 is provided with an IO power output terminal 231 (power output terminal), a unit power output terminal 232, and a communication terminal (not shown).
  • the plurality of IO units 20 are connected in series to the communication coupler unit 10. Specifically, the connector 12 of the communication coupler unit 10 and IO so that the corresponding terminals (IO power output terminal 121 and IO power input terminal 221 and unit power output terminal 122 and unit power input terminal 222) are connected to each other.
  • the upper connector 22 of the unit 20a is connected.
  • the upper connector 22 of the IO units 20b to 20e and the lower connector 23 of the IO units 20a to 20d are connected, respectively.
  • FIG. 1 shows an example in which five IO units 20a to 20e are connected in series with the communication coupler unit 10, but the number of IO units is not limited to this.
  • the IO power input terminal 221 receives IO power (first power) from the IO power output terminal 121 of the communication coupler unit 10 or the IO power output terminal 231 of the IO unit 20 connected to the upper side.
  • the unit power input terminal 222 receives the unit power (second power) from the unit power output terminal 122 of the communication coupler unit 10 or the unit power output terminal 232 of the IO unit 20 connected to the upper side.
  • the IO power input terminal 221 is connected to the power port 211 and the IO power output terminal 231 by the IO power line 4. Further, inside the plurality of IO units 20, the unit power input terminal 222 is connected to the internal power circuit 27 and the unit power output terminal 232 by the unit power line 5. The internal power supply circuit 27 is connected to the internal circuit 24 of each IO unit 20 by a unit power supply line 5. Further, inside the plurality of IO units 20, the communication terminal of the upper connector 22 is connected to the communication terminal of the lower connector 23 by a communication line.
  • the IO power supply 2 and the unit power supply 3 are typically DC 24V power supplies.
  • the bus power supply circuit 15 steps down the power voltage supplied from the unit power supply 3 (for example, from 24V DC to 5.8V DC).
  • the bus power supply circuit 15 supplies the stepped-down power to the internal power supply circuits 13 and 27.
  • the internal power supply circuits 13 and 27 step down the power voltage supplied from the bus power supply circuit 15 (for example, from DC 5.8V to DC 3.3V or DC 1.2V).
  • the internal power supply circuits 13 and 27 supply step-down electric power to the internal circuits 14 and 24, respectively.
  • each connector connector 12, upper connector 22, lower connector 23
  • two are used for IO power supply + and IO power supply-
  • two are used for unit power supply + and unit power supply-.
  • the rest is used for communication lines.
  • the end unit 30 is connected to the terminal side (IO unit 20e) of a plurality of IO units 20 connected to each other.
  • the end unit 30 is a cover member that protects the lower connector 23 of the IO unit 20e.
  • the IO power supplied from the IO power supply 2 is supplied to the externally connected device connected to the power supply port 211 via the IO power supply line 4. Further, the unit power supplied from the unit power supply 3 is supplied to the internal circuits 14 and 24 via the unit power supply line 5. Further, the communication unit of the communication coupler unit 10 exchanges data with each IO unit 20 via a communication line.
  • FIG. 2 is a front perspective view (reference numeral 2A in FIG. 2), a front view (reference numeral 2B in FIG. 2), and a rear perspective view (reference numeral 2C in FIG. 2) of the IO unit 20.
  • the IO unit 20 includes a terminal block 21, an upper connector 22, a lower connector 23, an engaging portion 25, and an engaged portion 26.
  • the side of the IO unit 20 where the terminal block 21 is located will be described as the front, the opposite side as the rear, the left side toward the rear as the left side, and the right side as the right side.
  • the terminal block 21 is provided on the front surface of the IO unit 20.
  • the terminal block 21 includes a plurality of power supply ports 211 for connecting externally connected devices. In the example of FIG. 2, the number of terminals of the power supply port 211 is 16.
  • the upper connector 22 is provided on the right side surface of the IO unit 20.
  • the lower connector 23 is provided on the left side surface of the IO unit 20.
  • Each IO unit 20 is electrically connected by an upper connector 22 and a lower connector 23.
  • An engaging portion 25 is provided on the right side of the upper and lower end portions on the front surface of the IO unit 20.
  • An engaged portion 26 is provided on the left side of the upper and lower end portions on the front surface of the IO unit 20.
  • the engaging portion 25 and the engaged portion 26 are guides for connecting each IO unit 20.
  • FIG. 3 is a diagram showing an abnormality in the supply state of IO power due to poor contact in the IO unit system 1.
  • FIG. 3 shows an example in which four IO units 20a to 20d are connected in series to the communication coupler unit 10.
  • the description will be made with reference to the example of FIG.
  • the conventional IO unit system 1 when the unit power is not supplied to the IO unit 20, the internal circuit 24 is not driven, so that it is easy to detect an abnormality in the unit power supply state.
  • the conventional IO unit system 1 does not have a function of detecting whether or not IO power is supplied to the IO unit 20. Therefore, as shown in FIG. 3, when there is no contact failure in the terminal corresponding to the unit power but there is a contact failure in the terminal corresponding to the IO power, it is difficult to identify the cause of the externally connected device not operating.
  • FIG. 4 is a diagram showing an abnormality in the supply state of IO power due to multiple connections in the IO unit system.
  • a contact resistance R exists at each connector connecting portion of each IO unit 20.
  • the voltage of the IO power supply 2 is 24V
  • the load current flowing through the externally connected device via the IO power supply line 4 is I.
  • the voltage of the IO power supplied from the communication coupler unit 10 to the Nth IO unit 20 is represented by 24-I ⁇ R ⁇ N.
  • the power supply voltage specification range of the externally connected device is 20.4V to 26.4V.
  • the conventional IO unit system 1 cannot easily detect the voltage drop of IO power due to poor contact or multiple connections.
  • the IO unit system 1 according to the present embodiment can easily detect the voltage drop of the IO power by providing the monitoring unit 50 described later in the IO unit or the end unit.
  • the IO unit system 1 includes a plurality of IO units 20 including at least one IO unit 20A having a monitoring unit 50 (see FIG. 6).
  • FIG. 5 is a block diagram showing an example of the main configuration of the IO unit 20A according to the embodiment of the present invention.
  • the IO unit 20A includes a terminal block 21, an upper connector 22, a lower connector 23, an internal power supply circuit 27, and a monitoring unit 50.
  • the circuit constituting the monitoring unit 50 is a part of the internal circuit 24 in FIG. That is, the circuit constituting the monitoring unit 50 is driven by the electric power supplied from the unit power supply 3 via the unit power supply line 5.
  • the terminal block 21 may be provided with a terminal for measurement.
  • the user can directly measure the voltage of the IO power supply line 4 by applying a tester to the measurement terminal.
  • the monitoring unit 50 includes a step-down circuit 51, an AD converter 52, a determination unit 53, a display control unit 54, and a notification unit 55.
  • the monitoring unit 50 monitors the supply state of IO power in the IO unit 20A. In addition, the monitoring unit 50 displays information indicating the supply status to the user or notifies the controller.
  • the step-down circuit 51 is connected to the IO power input terminal 221 by the IO power line 4.
  • the step-down circuit 51 steps down the voltage of the IO power supply line 4.
  • the step-down circuit 51 outputs the step-down voltage of the IO power supply line 4 to the AD converter 52.
  • the AD converter 52 converts the voltage of the IO power supply line 4 as an analog signal input from the step-down circuit 51 into the IO power supply voltage value V1 as a digital signal.
  • the AD converter 52 outputs the IO power supply voltage value V1 to the determination unit 53.
  • the determination unit 53 determines the IO power supply state based on the IO power supply voltage value V1 acquired from the AD converter 52. For example, when the IO power supply voltage value V1 is equal to or higher than a predetermined first threshold value, the determination unit 53 determines that the IO power supply line 4 is in the first state in which the IO power is normally supplied. When the IO power supply voltage value V1 is equal to or more than a predetermined second threshold value smaller than a predetermined first threshold value and less than a predetermined first threshold value, the determination unit 53 supplies IO power to the IO power supply line 4, but the voltage It is determined that the second state is a descent.
  • the determination unit 53 determines that the IO power supply line 4 is in a third state in which the IO power is not normally supplied.
  • the predetermined second threshold value is set, for example, to the lower limit value of the power supply voltage specification range of the externally connected device.
  • the predetermined first threshold value and the predetermined second threshold value may be arbitrarily set according to the power supply voltage specification range of the externally connected device.
  • the determination unit 53 outputs the determination result of the IO power supply state to the display control unit 54 and the notification unit 55.
  • the determination unit 53 is, for example, an internal processing circuit (MPU) of the IO unit 20A.
  • the display control unit 54 controls the display of the display unit (not shown) based on the determination result acquired from the determination unit 53.
  • the display unit is an LED provided in the IO unit 20A
  • the display control unit 54 is an LED display circuit.
  • the display control unit 54 turns on the green LED when it obtains the determination result that the IO power is normally supplied from the determination unit 53 in the first state.
  • the display control unit 54 blinks the green LED when it obtains a determination result that the IO power is supplied from the determination unit 53 but the voltage drop is occurring in the second state.
  • the display control unit 54 turns on the red LED when the determination unit 53 obtains the determination result that the IO power is not normally supplied to the IO power supply line 4 in the third state.
  • the display control unit 54 can notify the user of the supply state of IO power.
  • the display method of the display unit based on the supply state of the IO power supply 2 is not limited to this.
  • the notification unit 55 notifies the communication unit of the communication coupler unit 10 via the communication line 6 based on the determination result acquired from the determination unit 53.
  • the communication unit of the communication coupler unit 10 notifies the controller of the determination result.
  • the notification unit 55 is, for example, an ASIC (Application Specific Integrated Circuit) for bus communication.
  • the IO unit system 1 is provided with the monitoring unit 50, so that the IO power supply status can be monitored by the IO unit 20A.
  • the monitoring unit 50 can detect an abnormality in the supply state of IO power to the IO power supply line 4.
  • the monitoring unit 50 monitors the voltage of the IO power supply line 4 as the supply state of IO power. Therefore, as compared with the case of monitoring the current of the IO power supply line 4, it is possible to detect the voltage drop of the IO power due to multiple connections or poor contact.
  • FIG. 6 is a diagram showing how the IO unit 20A detects an abnormality in the supply state of the IO power supply 2.
  • FIG. 6 shows an example in which the communication coupler unit 10 to the second IO unit 20Aa and the communication coupler unit 10 to the fifth IO unit 20Ab include the monitoring unit 50 among the five IO units 20. ..
  • the description will be made with reference to the example of FIG.
  • the monitoring unit 50 of the IO unit 20Aa determines that there is no abnormality in the IO power supply state
  • the monitoring unit 50 of the IO unit 20Ab determines that there is an abnormality in the IO power supply state
  • the IO unit system 1 is provided with a plurality of IO units 20A as compared with a configuration in which the monitoring unit 50 is provided in the end unit described later, so that it is easy to identify the cause of the abnormality in the IO power supply state. ..
  • IO units 20 among the plurality of IO units 20 may be provided with the monitoring unit 50. Since only some IO units are provided with the monitoring unit 50, it is possible to detect an abnormality in the IO power supply state at no cost.
  • FIG. 7 is a block diagram showing an example of a main configuration of the end unit 30A according to another embodiment of the present invention.
  • the end unit 30A includes a connector 32, an internal power supply circuit 33, and a monitoring unit 50.
  • the connector 32 is provided with an IO power input terminal 321 and a unit power input terminal 322, and a communication terminal (not shown).
  • the end unit 30 is connected to the terminal side of a plurality of IO units connected to each other via the connector 32.
  • the lower connector 23 and the end unit of the IO unit 20 are connected so that the corresponding terminals (IO power output terminal 231 and IO power input terminal 321 and unit power output terminal 232 and unit power input terminal 322) are connected.
  • the connector 32 of 30 is connected.
  • the internal power supply circuit 33 is connected to the unit power supply input terminal 322 by the unit power supply line 8. Further, the internal power supply circuit 33 is connected to the monitoring unit 50 by a unit power supply line 8. With such a configuration, the monitoring unit 50 is driven by the unit power supplied to the end unit 30A.
  • the configuration of the monitoring unit 50 of the end unit 30A is the same as that of the monitoring unit 50 of the IO unit 20A according to the first embodiment.
  • the step-down circuit 51 is connected to the IO power input terminal 321 by an IO power supply line 7 (second power supply line).
  • the step-down circuit 51 acquires the voltage of the IO power supply line 7 and steps down the voltage.
  • FIG. 8 is a diagram showing how the end unit 30A detects an abnormality in the IO power supply state.
  • FIG. 8 shows an example in which the end unit 30A is connected to the terminal side of the four IO units 20.
  • the description will be made with reference to the example of FIG.
  • the monitoring unit 50 can detect the abnormality in the IO power supply state.
  • the control block (particularly the determination unit 53, the display control unit 54, and the notification unit 55) of the monitoring unit 50 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or software. It may be realized by.
  • the monitoring unit 50 includes a computer that executes instructions of a program that is software that realizes each function.
  • the computer includes, for example, one or more processors and a computer-readable recording medium that stores the program. Then, in the computer, the processor reads the program from the recording medium and executes it, thereby achieving the object of the present invention.
  • a CPU Central Processing Unit
  • the recording medium a "non-temporary tangible medium", for example, a ROM (Read Only Memory) or the like, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
  • a RAM Random Access Memory
  • the program may be supplied to the computer via an arbitrary transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program.
  • a transmission medium communication network, broadcast wave, etc.
  • one aspect of the present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the above program is embodied by electronic transmission. (summary)
  • the IO unit is attached to a first power input terminal that receives first power from another connected IO unit and a device connected to the power port.
  • the first power is supplied to the power supply line by measuring the voltage of the power supply port for supplying the first power, the power supply line connecting the first power supply terminal and the power supply port, and the power supply line. It is equipped with a monitoring unit that monitors whether or not it is present.
  • the IO unit can monitor the supply state of the first power by providing the monitoring unit.
  • the monitoring unit can detect an abnormality in the supply state of the first power to the power supply line.
  • the monitoring unit monitors the voltage of the power supply line as the supply state of the first electric power. Therefore, as compared with the case of monitoring the current of the power supply line, it is possible to detect the voltage drop of the first power due to multiple connections or poor contact. Therefore, multiple connections or poor contact can be detected.
  • the monitoring unit includes a determination unit that determines whether or not the first power is supplied to the power supply line, and a display that displays the supply state of the first power to the user based on the determination result of the determination unit.
  • a control unit may be provided.
  • the display control unit displays the first power supply status to the user, so that when there is an abnormality in the first power supply status, the user can easily identify the abnormal location. ..
  • the monitoring unit includes a determination unit that determines whether or not the first electric power is supplied to the power supply line, and a notification unit that notifies the controller that controls the IO unit of the determination result of the determination unit. , May be provided.
  • the controller can notify the user of the supply status.
  • the determination unit determines that the first power is normally supplied to the power supply line in the first state.
  • the value corresponding to the voltage of the power supply line is equal to or more than a predetermined second threshold value smaller than the first threshold value and less than the first threshold value, the first power is sufficiently supplied to the power supply line. If it is determined that the second state has a voltage drop and the value corresponding to the voltage of the power supply line is less than the second threshold value, the first power is not properly supplied to the power supply line. It may be determined that there are three states.
  • the IO unit further includes a power output terminal for outputting the first power to the other connected IO unit, and the power line connects the first power input terminal and the power output terminal. You may.
  • the IO unit further includes a second power input terminal that receives a second power from the other connected IO unit, and the circuit constituting the monitoring unit may operate by the second power.
  • the first power supplied to the device via the power port and the second power for operating the circuit constituting the monitoring unit are supplied from different terminals of the IO unit. Therefore, even when the voltage drop of the first power occurs due to multiple connections or poor contact, the circuit constituting the monitoring unit can operate by the second power supplied from different terminals. Therefore, even when the first power is not properly supplied, it is possible to detect an abnormality in the supply state of the first power.
  • the end unit is an end unit connected to the terminal side of a plurality of IO units connected to each other, and is attached to a device connected to the IO unit.
  • the end unit can monitor the supply state of the first power by providing the monitoring unit.
  • the monitoring unit can detect an abnormality in the supply state of the first power to the power supply line.
  • the monitoring unit monitors the voltage of the power supply line as the supply state of the first electric power. Therefore, as compared with the case of monitoring the current of the power supply line, it is possible to detect the voltage drop of the first power due to multiple connections or poor contact.
  • the end unit originally connected for the purpose of protecting the terminal side of the IO unit is provided with a monitoring unit. That is, the structure can be simplified by providing a new member provided with a monitoring unit.
  • the monitoring unit includes a determination unit that determines whether or not the first power is supplied to the second power supply line, and a display that displays the supply state of the first power to the user based on the determination result of the determination unit.
  • a control unit may be provided.
  • the monitoring unit includes a determination unit that determines whether or not the first power is supplied to the second power supply line, and a notification unit that notifies the controller that controls the IO unit of the determination result of the determination unit. , May be provided.
  • the determination unit determines that the first power is normally supplied to the second power supply line in the first state.
  • the first power is supplied to the second power supply line.
  • the first power supply is applied to the second power supply line. May be determined to be a third state in which is not normally supplied.
  • the end unit further includes a second power input terminal that receives a second power from the terminal side of the plurality of IO units, and the circuit constituting the monitoring unit may operate by the second power.

Abstract

Provided is an IO unit system capable of appropriately detecting an abnormality in supply state of IO power. An IO unit (20A) comprises: a first power supply input terminal (221) that receives first power from other connected IO units; a power supply port (211) that supplies the first power to a device connected thereto; a power supply line (4) that connects the first power supply input terminal to the power supply port; and a monitoring unit (50) that monitors whether or not the first power is supplied to the power supply line by measuring the voltage of the power supply line.

Description

ＩＯユニットおよびエンドユニットIO unit and end unit
　本発明はＩＯユニットおよびエンドユニットに関する。 The present invention relates to an IO unit and an end unit.
　従来、外部接続機器に対して所定の入出力制御を行う複数のＩＯユニットを備えるＩＯユニットシステムが知られている。特許文献１には、エンドカバーにバスインタフェースと、バス機能用レジスタ及びバス故障診断用レジスタとを備えるＰＬＣ装置が開示されている。特許文献２には、外部接続機器に電力を供給する電源ラインでの過電流を検出する過電流検出手段を備えるリモートＩ／Ｏユニットが開示されている。 Conventionally, an IO unit system including a plurality of IO units that perform predetermined input / output control for externally connected devices is known. Patent Document 1 discloses a PLC device including a bus interface, a bus function register, and a bus failure diagnosis register on an end cover. Patent Document 2 discloses a remote I / O unit including an overcurrent detecting means for detecting an overcurrent in a power supply line that supplies electric power to an externally connected device.
日本国公開特許公報「特開２０１１－０７０２８４号公報」Japanese Patent Publication "Japanese Patent Laid-Open No. 2011-070284" 日本国公開特許公報「特開２００９－０９９００２号公報」Japanese Patent Publication "Japanese Patent Laid-Open No. 2009-909002"
　しかしながら、特許文献１に記載のＰＬＣ装置は、バスの故障診断をするものであり、外部接続機器への電力の供給状態を監視するものではない。特許文献２に記載のリモートＩＯユニットでは、内部回路用の電力と外部接続機器用の電力とは同一の外部電源から供給される。そのため、ＩＯユニットの多接続またはＩＯユニット同士の接触不良などによる外部電源の電圧降下が生じた場合、過電流検出手段を含む内部回路に十分な電力が供給されず、過電流検出手段による検出動作を行うことができない可能性がある。すなわち、特許文献２に記載のリモートＩＯユニットでは、ＩＯ電源の電圧降下を検知することができない。 However, the PLC device described in Patent Document 1 diagnoses a bus failure, and does not monitor the power supply status to the externally connected device. In the remote IO unit described in Patent Document 2, the electric power for the internal circuit and the electric power for the externally connected device are supplied from the same external power source. Therefore, when the voltage drop of the external power supply occurs due to multiple connections of IO units or poor contact between IO units, sufficient power is not supplied to the internal circuit including the overcurrent detecting means, and the detection operation by the overcurrent detecting means May not be possible. That is, the remote IO unit described in Patent Document 2 cannot detect the voltage drop of the IO power supply.
　本発明の一態様は、上記の問題点を鑑みてなされたものであり、ＩＯ電力の供給状態の異常を適切に検知することができるＩＯユニットシステムを提供することにある。 One aspect of the present invention has been made in view of the above problems, and an object of the present invention is to provide an IO unit system capable of appropriately detecting an abnormality in an IO power supply state.
　上記の課題を解決するために、本発明の一態様に係るＩＯユニットは、接続された他のＩＯユニットから、第１電力を受け取る第１電源入力端子と、電源ポートに接続されたデバイスに前記第１電力を供給する前記電源ポートと、前記第１電源端子と前記電源ポートとを接続する電源ラインと、前記電源ラインの電圧を測定することにより前記電源ラインに前記第１電力が供給されているか否かを監視する監視部とを備える。 In order to solve the above problems, the IO unit according to one aspect of the present invention is attached to a first power input terminal that receives first power from another connected IO unit and a device connected to the power port. The first power is supplied to the power supply line by measuring the voltage of the power supply port for supplying the first power, the power supply line connecting the first power supply terminal and the power supply port, and the power supply line. It is equipped with a monitoring unit that monitors whether or not it is present.
　上記の課題を解決するために、本発明の一態様に係るエンドユニットは、互いに連結された複数のＩＯユニットの終端側に接続されるエンドユニットであって、前記ＩＯユニットに接続されたデバイスに第１電力を供給する、前記ＩＯユニットの第１電源ラインに接続される第１電源入力端子と、前記第１電源入力端子に接続されている第２電源ラインと、前記第２電源ラインの電圧を測定することにより前記第２電源ラインに電力が供給されているか否かを監視する監視部とを備える。 In order to solve the above problems, the end unit according to one aspect of the present invention is an end unit connected to the terminal side of a plurality of IO units connected to each other, and is attached to a device connected to the IO unit. The voltage of the first power input terminal connected to the first power line of the IO unit, the second power line connected to the first power input terminal, and the second power line that supply the first power. It is provided with a monitoring unit that monitors whether or not power is being supplied to the second power supply line by measuring.
　本発明の一態様によれば、ＩＯ電力の供給状態の異常を適切に検知することができるＩＯユニットシステムを提供する。 According to one aspect of the present invention, an IO unit system capable of appropriately detecting an abnormality in the supply state of IO power is provided.
ＩＯユニットシステムの概略構成を示す模式図である。It is a schematic diagram which shows the schematic structure of the IO unit system. ＩＯユニットの前方斜視図、前面図、および後方斜視図である。It is a front perspective view, a front view, and a rear perspective view of an IO unit. ＩＯユニットシステムにおける、接触不良によるＩＯ電源の供給状態の異常を示す図である。It is a figure which shows the abnormality of the supply state of IO power supply by a contact failure in an IO unit system. ＩＯユニットシステムにおける、多接続によるＩＯ電源の供給状態の異常を示す図である。It is a figure which shows the abnormality of the supply state of IO power by multiple connections in an IO unit system. 本発明の一実施形態に係るＩＯユニットの要部構成の一例を示すブロック図である。It is a block diagram which shows an example of the main part structure of the IO unit which concerns on one Embodiment of this invention. 上記ＩＯユニットによりＩＯ電力の供給状態の異常を検知する様子を示す図である。It is a figure which shows the state which detects the abnormality of the supply state of IO power by the said IO unit. 本発明の他の実施形態に係るエンドユニットの要部構成の一例を示すブロック図である。It is a block diagram which shows an example of the main part structure of the end unit which concerns on other embodiment of this invention. 上記エンドユニットによりＩＯ電力の供給状態の異常を検知する様子を示す図である。It is a figure which shows the state which detects the abnormality of the supply state of IO power by the said end unit.
　以下、本発明の一側面に係る実施形態（以下、「本実施形態」とも表記する）を、図面に基づいて説明する。ただし、以下で説明する本実施形態は、あらゆる点において本発明の例示に過ぎない。本発明の範囲を逸脱することなく種々の改良や変形を行うことができることは言うまでもない。つまり、本発明の実施にあたって、実施形態に応じた具体的構成が適宜採用されてもよい。 Hereinafter, an embodiment according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described with reference to the drawings. However, the embodiments described below are merely examples of the present invention in all respects. Needless to say, various improvements and modifications can be made without departing from the scope of the present invention. That is, in carrying out the present invention, a specific configuration according to the embodiment may be appropriately adopted.
　§１　適用例
　（ＩＯユニットシステム１の概略構成）
　図１～図４に基づいて、本発明が適用される場面の一例について説明する。図１は、ＩＯユニットシステム１の概略構成を示す模式図である。図１に示すように、ＩＯユニットシステム１は、通信カプラユニット１０と、複数のＩＯユニット２０と、エンドユニット３０とを備える。通信カプラユニット１０は、上位のマスタ装置にネットワークを介して接続されている。ＩＯユニットシステム１は、外部接続機器（デバイス）に対して所定の入出力制御を行う。 §1 Application example (outline configuration of IO unit system 1)
An example of a situation in which the present invention is applied will be described with reference to FIGS. 1 to 4. FIG. 1 is a schematic diagram showing a schematic configuration of the IO unit system 1. As shown in FIG. 1, the IO unit system 1 includes a communication coupler unit 10, a plurality of IO units 20, and an end unit 30. The communication coupler unit 10 is connected to a higher-level master device via a network. The IO unit system 1 performs predetermined input / output control on an externally connected device (device).
　通信カプラユニット１０は、マスタ装置（図示せず）から、電源供給を開始する開始指示を受け付ける。なお、ＩＯユニットシステム１は、通信カプラユニット１０の代わりにマスタ装置であるＰＬＣ（Programmable Logic Controller）ユニットを備えてもよい。 The communication coupler unit 10 receives a start instruction to start power supply from the master device (not shown). The IO unit system 1 may include a PLC (Programmable Logic Controller) unit which is a master device instead of the communication coupler unit 10.
　通信カプラユニット１０は、マスタ装置とデータのやり取りを行う通信部（図示せず）と、電源端子台１１と、コネクタ１２とを備える。電源端子台１１には、外部のＩＯ電源２と接続されるＩＯ電源供給用端子１１１と、外部のユニット電源３と接続されるユニット電源供給用端子１１２とが設けられている。コネクタ１２には、ＩＯ電源出力端子１２１とユニット電源出力端子１２２と通信用端子（図示せず）とが設けられている。 The communication coupler unit 10 includes a communication unit (not shown) for exchanging data with the master device, a power terminal block 11, and a connector 12. The power terminal block 11 is provided with an IO power supply terminal 111 connected to the external IO power supply 2 and a unit power supply terminal 112 connected to the external unit power supply 3. The connector 12 is provided with an IO power output terminal 121, a unit power output terminal 122, and a communication terminal (not shown).
　通信カプラユニット１０の内部において、ＩＯ電源供給用端子１１１は、ＩＯ電源出力端子１２１とＩＯ電源ライン４（第１電源ライン）により接続されている。また、通信カプラユニット１０の内部において、ユニット電源供給用端子１１２は、内部電源回路１３およびユニット電源出力端子１２２とバス電源回路１５を介して接続されている。内部電源回路１３は、通信カプラユニット１０の内部回路１４と接続されている。さらに、通信カプラユニット１０の内部において、通信部は、コネクタ１２の通信用端子と通信ライン（図示せず）により接続されている。 Inside the communication coupler unit 10, the IO power supply terminal 111 is connected to the IO power output terminal 121 by the IO power supply line 4 (first power supply line). Further, inside the communication coupler unit 10, the unit power supply terminal 112 is connected to the internal power supply circuit 13 and the unit power output terminal 122 via the bus power supply circuit 15. The internal power supply circuit 13 is connected to the internal circuit 14 of the communication coupler unit 10. Further, inside the communication coupler unit 10, the communication unit is connected to the communication terminal of the connector 12 by a communication line (not shown).
　複数のＩＯユニット２０はそれぞれ、端子台２１と、上位側コネクタ２２と、下位側コネクタ２３とを備える。上位側コネクタ２２と、下位側コネクタ２３とは、ＩＯユニット２０の両側面にそれぞれ設けられている（図２参照）。端子台２１には外部接続機器と接続される複数の電源ポート２１１が設けられている。上位側コネクタ２２には、ＩＯ電源入力端子２２１（第１電源入力端子）とユニット電源入力端子２２２（第２電源入力端子）と通信用端子（図示せず）とが設けられている。下位側コネクタ２３には、ＩＯ電源出力端子２３１（電源出力端子）とユニット電源出力端子２３２と通信用端子（図示せず）とが設けられている。 Each of the plurality of IO units 20 includes a terminal block 21, an upper connector 22, and a lower connector 23. The upper connector 22 and the lower connector 23 are provided on both side surfaces of the IO unit 20 (see FIG. 2). The terminal block 21 is provided with a plurality of power supply ports 211 connected to externally connected devices. The upper connector 22 is provided with an IO power input terminal 221 (first power input terminal), a unit power input terminal 222 (second power input terminal), and a communication terminal (not shown). The lower connector 23 is provided with an IO power output terminal 231 (power output terminal), a unit power output terminal 232, and a communication terminal (not shown).
　複数のＩＯユニット２０は、通信カプラユニット１０に直列に接続されている。具体的には、対応する端子（ＩＯ電源出力端子１２１とＩＯ電源入力端子２２１、ユニット電源出力端子１２２とユニット電源入力端子２２２）が互いに接続されるように、通信カプラユニット１０のコネクタ１２とＩＯユニット２０ａの上位側コネクタ２２とが接続されている。同様に、ＩＯユニット２０ｂ～２０ｅの上位側コネクタ２２とＩＯユニット２０ａ～２０ｄの下位側コネクタ２３とがそれぞれ接続されている。なお、図１においては、５つのＩＯユニット２０ａ～２０ｅが通信カプラユニット１０に直列に接続されている例を示しているが、ＩＯユニットの数としてはこれに限定されない。 The plurality of IO units 20 are connected in series to the communication coupler unit 10. Specifically, the connector 12 of the communication coupler unit 10 and IO so that the corresponding terminals (IO power output terminal 121 and IO power input terminal 221 and unit power output terminal 122 and unit power input terminal 222) are connected to each other. The upper connector 22 of the unit 20a is connected. Similarly, the upper connector 22 of the IO units 20b to 20e and the lower connector 23 of the IO units 20a to 20d are connected, respectively. Note that FIG. 1 shows an example in which five IO units 20a to 20e are connected in series with the communication coupler unit 10, but the number of IO units is not limited to this.
　ＩＯ電源入力端子２２１は、通信カプラユニット１０のＩＯ電源出力端子１２１あるいは上位側に接続されたＩＯユニット２０のＩＯ電源出力端子２３１から、ＩＯ電力（第１電力）を受け取る。ユニット電源入力端子２２２は、通信カプラユニット１０のユニット電源出力端子１２２あるいは上位側に接続されたＩＯユニット２０のユニット電源出力端子２３２から、ユニット電力（第２電力）を受け取る。 The IO power input terminal 221 receives IO power (first power) from the IO power output terminal 121 of the communication coupler unit 10 or the IO power output terminal 231 of the IO unit 20 connected to the upper side. The unit power input terminal 222 receives the unit power (second power) from the unit power output terminal 122 of the communication coupler unit 10 or the unit power output terminal 232 of the IO unit 20 connected to the upper side.
　複数のＩＯユニット２０の内部において、ＩＯ電源入力端子２２１は、電源ポート２１１およびＩＯ電源出力端子２３１とＩＯ電源ライン４により接続されている。また、複数のＩＯユニット２０の内部において、ユニット電源入力端子２２２は、内部電源回路２７およびユニット電源出力端子２３２とユニット電源ライン５により接続されている。内部電源回路２７は、各ＩＯユニット２０の内部回路２４とユニット電源ライン５により接続されている。さらに、複数のＩＯユニット２０の内部において、上位側コネクタ２２の通信用端子は、下位側コネクタ２３の通信用端子と通信ラインにより接続されている。 Inside the plurality of IO units 20, the IO power input terminal 221 is connected to the power port 211 and the IO power output terminal 231 by the IO power line 4. Further, inside the plurality of IO units 20, the unit power input terminal 222 is connected to the internal power circuit 27 and the unit power output terminal 232 by the unit power line 5. The internal power supply circuit 27 is connected to the internal circuit 24 of each IO unit 20 by a unit power supply line 5. Further, inside the plurality of IO units 20, the communication terminal of the upper connector 22 is connected to the communication terminal of the lower connector 23 by a communication line.
　なお、ＩＯ電源２およびユニット電源３は、典型的にはＤＣ２４Ｖ電源である。バス電源回路１５は、ユニット電源３から供給される電力電圧を（例えばＤＣ２４ＶからＤＣ５．８Ｖに）降圧する。バス電源回路１５は、降圧した電力を内部電源回路１３、２７に供給する。内部電源回路１３、２７は、バス電源回路１５から供給される電力電圧を（例えばＤＣ５．８ＶからＤＣ３．３ＶあるいはＤＣ１．２Ｖに）降圧する。内部電源回路１３、２７は、それぞれ降圧した電力を内部回路１４、２４に供給する。 The IO power supply 2 and the unit power supply 3 are typically DC 24V power supplies. The bus power supply circuit 15 steps down the power voltage supplied from the unit power supply 3 (for example, from 24V DC to 5.8V DC). The bus power supply circuit 15 supplies the stepped-down power to the internal power supply circuits 13 and 27. The internal power supply circuits 13 and 27 step down the power voltage supplied from the bus power supply circuit 15 (for example, from DC 5.8V to DC 3.3V or DC 1.2V). The internal power supply circuits 13 and 27 supply step-down electric power to the internal circuits 14 and 24, respectively.
　また、各コネクタ（コネクタ１２、上位側コネクタ２２、下位側コネクタ２３）の複数の端子のうち、２つがＩＯ電源＋、ＩＯ電源－に使用され、２つがユニット電源＋、ユニット電源－に使用され、残りが通信ラインに使用される。 Further, of the plurality of terminals of each connector (connector 12, upper connector 22, lower connector 23), two are used for IO power supply + and IO power supply-, and two are used for unit power supply + and unit power supply-. , The rest is used for communication lines.
　エンドユニット３０は、互いに連結された複数のＩＯユニット２０の終端側（ＩＯユニット２０ｅ）に接続されている。エンドユニット３０は、ＩＯユニット２０ｅの下位側コネクタ２３を保護するカバー部材である。 The end unit 30 is connected to the terminal side (IO unit 20e) of a plurality of IO units 20 connected to each other. The end unit 30 is a cover member that protects the lower connector 23 of the IO unit 20e.
　以上の構成により、ＩＯ電源２から供給されるＩＯ電力は、ＩＯ電源ライン４を介して電源ポート２１１に接続される外部接続機器に供給される。また、ユニット電源３から供給されるユニット電力は、ユニット電源ライン５を介して内部回路１４、２４に供給される。また、通信カプラユニット１０の通信部は、通信ラインを介して各ＩＯユニット２０とデータのやり取りを行う。 With the above configuration, the IO power supplied from the IO power supply 2 is supplied to the externally connected device connected to the power supply port 211 via the IO power supply line 4. Further, the unit power supplied from the unit power supply 3 is supplied to the internal circuits 14 and 24 via the unit power supply line 5. Further, the communication unit of the communication coupler unit 10 exchanges data with each IO unit 20 via a communication line.
　（ＩＯユニット２０の概略構成）
　図２は、ＩＯユニット２０の前方斜視図（図２の符号２Ａ）、前面図（図２の符号２Ｂ）、および後方斜視図（図２の符号２Ｃ）である。図２に示すように、ＩＯユニット２０は、端子台２１と上位側コネクタ２２と下位側コネクタ２３と係合部２５と被係合部２６とを備える。以下、ＩＯユニット２０における、端子台２１が位置する側を前方、その反対側を後方、後方に向かって左側を左方、右側を右方として説明する。 (Outline configuration of IO unit 20)
FIG. 2 is a front perspective view (reference numeral 2A in FIG. 2), a front view (reference numeral 2B in FIG. 2), and a rear perspective view (reference numeral 2C in FIG. 2) of the IO unit 20. As shown in FIG. 2, the IO unit 20 includes a terminal block 21, an upper connector 22, a lower connector 23, an engaging portion 25, and an engaged portion 26. Hereinafter, the side of the IO unit 20 where the terminal block 21 is located will be described as the front, the opposite side as the rear, the left side toward the rear as the left side, and the right side as the right side.
　端子台２１は、ＩＯユニット２０の前面に設けられている。端子台２１は、外部接続機器を接続する複数の電源ポート２１１を備える。図２の例示において、電源ポート２１１の端子数は１６である。 The terminal block 21 is provided on the front surface of the IO unit 20. The terminal block 21 includes a plurality of power supply ports 211 for connecting externally connected devices. In the example of FIG. 2, the number of terminals of the power supply port 211 is 16.
　上位側コネクタ２２は、ＩＯユニット２０の右側面に設けられている。下位側コネクタ２３は、ＩＯユニット２０の左側面に設けられている。各ＩＯユニット２０は、上位側コネクタ２２および下位側コネクタ２３により電気的に接続されている。 The upper connector 22 is provided on the right side surface of the IO unit 20. The lower connector 23 is provided on the left side surface of the IO unit 20. Each IO unit 20 is electrically connected by an upper connector 22 and a lower connector 23.
　ＩＯユニット２０の前面における上下端部の右側には係合部２５が設けられている。ＩＯユニット２０の前面における上下端部の左側には被係合部２６が設けられている。係合部２５および被係合部２６は、各ＩＯユニット２０を接続するためのガイドである。 An engaging portion 25 is provided on the right side of the upper and lower end portions on the front surface of the IO unit 20. An engaged portion 26 is provided on the left side of the upper and lower end portions on the front surface of the IO unit 20. The engaging portion 25 and the engaged portion 26 are guides for connecting each IO unit 20.
　図３は、ＩＯユニットシステム１における、接触不良によるＩＯ電力の供給状態の異常を示す図である。図３は、４つのＩＯユニット２０ａ～２０ｄが通信カプラユニット１０に直列に接続されている例を示している。以下、簡単のために、図３の例示を参照して説明する。 FIG. 3 is a diagram showing an abnormality in the supply state of IO power due to poor contact in the IO unit system 1. FIG. 3 shows an example in which four IO units 20a to 20d are connected in series to the communication coupler unit 10. Hereinafter, for the sake of simplicity, the description will be made with reference to the example of FIG.
　図３に示すように、ＩＯユニット２０ｃとＩＯユニット２０ｄとの間において、ＩＯ電力に対応する端子に接触不良がある場合、ＩＯ電力は正常にＩＯユニット２０ｄに供給されない。そのため、ＩＯユニット２０ｄと接続された外部接続機器は正常に動作しない。一方、ユニット電力に対応する端子の接触不良はないため、ユニット電力はＩＯユニット２０ｄに供給される。そのため、ＩＯユニット２０ｄの内部回路２４は正常に駆動される。 As shown in FIG. 3, if there is a poor contact between the IO unit 20c and the IO unit 20d at the terminal corresponding to the IO power, the IO power is not normally supplied to the IO unit 20d. Therefore, the externally connected device connected to the IO unit 20d does not operate normally. On the other hand, since there is no contact failure of the terminals corresponding to the unit power, the unit power is supplied to the IO unit 20d. Therefore, the internal circuit 24 of the IO unit 20d is normally driven.
　従来のＩＯユニットシステム１において、ユニット電力がＩＯユニット２０に供給されない場合は、内部回路２４が駆動しないため、ユニット電力の供給状態の異常を検知することは容易である。一方、従来のＩＯユニットシステム１は、ＩＯ電力がＩＯユニット２０に供給されているか否かを検知する機能を持たない。そのため、図３に示すような、ユニット電力に対応する端子に接触不良はないがＩＯ電力に対応する端子に接触不良がある場合、外部接続機器が動作しない原因を特定することが困難である。 In the conventional IO unit system 1, when the unit power is not supplied to the IO unit 20, the internal circuit 24 is not driven, so that it is easy to detect an abnormality in the unit power supply state. On the other hand, the conventional IO unit system 1 does not have a function of detecting whether or not IO power is supplied to the IO unit 20. Therefore, as shown in FIG. 3, when there is no contact failure in the terminal corresponding to the unit power but there is a contact failure in the terminal corresponding to the IO power, it is difficult to identify the cause of the externally connected device not operating.
　図４は、ＩＯユニットシステムにおける、多接続によるＩＯ電力の供給状態の異常を示す図である。図４に示すように、各ＩＯユニット２０のコネクタ連結部分には、それぞれ接触抵抗Ｒが存在する。ここで、ＩＯ電源２の電圧を２４Ｖ、ＩＯ電源ライン４を介して外部接続機器に流れる負荷電流をＩとする。このとき、通信カプラユニット１０からＮ台目のＩＯユニット２０に供給されるＩＯ電力の電圧は、２４－Ｉ×Ｒ×Ｎで表される。例えば、Ｉ＝２Ａ、Ｒ＝０．１Ωのとき、通信カプラユニット１０から６台目（すなわちＮ＝６）のＩＯユニット２０に供給されるＩＯ電力の電圧は、２２．８Ｖである。また、通信カプラユニット１０から２０台目（すなわちＮ＝２０）のＩＯユニット２０に供給されるＩＯ電力の電圧は、２０．０Ｖである。ここで、外部接続機器の電源電圧仕様範囲は２０．４Ｖ～２６．４Ｖである。このとき、２０台目のＩＯユニット２０には十分なＩＯ電源電圧が供給されていないため、２０台目のＩＯユニット２０に接続された外部接続機器は正常に動作しない。従来のＩＯユニットシステム１は、上述のようなＩＯユニット２０の多接続によるＩＯ電力の電圧降下がある場合についても、外部接続機器が動作しない原因を特定することが困難である。 FIG. 4 is a diagram showing an abnormality in the supply state of IO power due to multiple connections in the IO unit system. As shown in FIG. 4, a contact resistance R exists at each connector connecting portion of each IO unit 20. Here, the voltage of the IO power supply 2 is 24V, and the load current flowing through the externally connected device via the IO power supply line 4 is I. At this time, the voltage of the IO power supplied from the communication coupler unit 10 to the Nth IO unit 20 is represented by 24-I × R × N. For example, when I = 2A and R = 0.1Ω, the voltage of the IO power supplied from the communication coupler unit 10 to the sixth (that is, N = 6) IO unit 20 is 22.8V. Further, the voltage of the IO power supplied to the 20th IO unit 20 from the communication coupler unit 10 (that is, N = 20) is 20.0V. Here, the power supply voltage specification range of the externally connected device is 20.4V to 26.4V. At this time, since a sufficient IO power supply voltage is not supplied to the 20th IO unit 20, the externally connected device connected to the 20th IO unit 20 does not operate normally. In the conventional IO unit system 1, it is difficult to identify the cause of the externally connected device not operating even when there is a voltage drop of IO power due to the multiple connections of the IO unit 20 as described above.
　図３、４に示すように、従来のＩＯユニットシステム１は、接触不良または多接続によるＩＯ電力の電圧降下を容易に検知することができない。一方、本実施形態に係るＩＯユニットシステム１は、ＩＯユニットまたはエンドユニットに後述する監視部５０を備えることにより、ＩＯ電力の電圧降下を容易に検知することができる。 As shown in FIGS. 3 and 4, the conventional IO unit system 1 cannot easily detect the voltage drop of IO power due to poor contact or multiple connections. On the other hand, the IO unit system 1 according to the present embodiment can easily detect the voltage drop of the IO power by providing the monitoring unit 50 described later in the IO unit or the end unit.
　§２　構成例
　〔実施形態１〕
　（ＩＯユニット２０Ａの構成）
　本発明の一実施形態に係るＩＯユニットシステム１は、監視部５０を有する少なくとも１つ以上のＩＯユニット２０Ａを含む複数のＩＯユニット２０を備える（図６を参照）。 §2 Configuration example [Embodiment 1]
(Configuration of IO unit 20A)
The IO unit system 1 according to an embodiment of the present invention includes a plurality of IO units 20 including at least one IO unit 20A having a monitoring unit 50 (see FIG. 6).
　図５は、本発明の一実施形態に係るＩＯユニット２０Ａの要部構成の一例を示すブロック図である。図５に示すように、ＩＯユニット２０Ａは、端子台２１と、上位側コネクタ２２と、下位側コネクタ２３と、内部電源回路２７と、監視部５０とを備える。なお、監視部５０を構成する回路は、図１における内部回路２４の一部である。すなわち、監視部５０を構成する回路は、ユニット電源３からユニット電源ライン５を介して供給される電力により駆動する。 FIG. 5 is a block diagram showing an example of the main configuration of the IO unit 20A according to the embodiment of the present invention. As shown in FIG. 5, the IO unit 20A includes a terminal block 21, an upper connector 22, a lower connector 23, an internal power supply circuit 27, and a monitoring unit 50. The circuit constituting the monitoring unit 50 is a part of the internal circuit 24 in FIG. That is, the circuit constituting the monitoring unit 50 is driven by the electric power supplied from the unit power supply 3 via the unit power supply line 5.
　端子台２１は、測定用の端子を備えていてもよい。ユーザは、当該測定用の端子にテスタをあてることによりＩＯ電源ライン４の電圧を直接測定することが可能である。 The terminal block 21 may be provided with a terminal for measurement. The user can directly measure the voltage of the IO power supply line 4 by applying a tester to the measurement terminal.
　監視部５０は、降圧回路５１と、ＡＤコンバータ５２と、判定部５３と、表示制御部５４と、通知部５５とを備える。監視部５０は、ＩＯユニット２０ＡにおけるＩＯ電力の供給状態を監視する。また、監視部５０は、当該供給状態を示す情報をユーザに表示する、あるいはコントローラに通知する。 The monitoring unit 50 includes a step-down circuit 51, an AD converter 52, a determination unit 53, a display control unit 54, and a notification unit 55. The monitoring unit 50 monitors the supply state of IO power in the IO unit 20A. In addition, the monitoring unit 50 displays information indicating the supply status to the user or notifies the controller.
　降圧回路５１は、ＩＯ電源入力端子２２１とＩＯ電源ライン４により接続されている。降圧回路５１は、ＩＯ電源ライン４の電圧を降圧する。降圧回路５１は、降圧したＩＯ電源ライン４の電圧をＡＤコンバータ５２に出力する。 The step-down circuit 51 is connected to the IO power input terminal 221 by the IO power line 4. The step-down circuit 51 steps down the voltage of the IO power supply line 4. The step-down circuit 51 outputs the step-down voltage of the IO power supply line 4 to the AD converter 52.
　ＡＤコンバータ５２は、降圧回路５１から入力されるアナログ信号としてのＩＯ電源ライン４の電圧を、デジタル信号としてのＩＯ電源電圧値Ｖ１に変換する。ＡＤコンバータ５２は、ＩＯ電源電圧値Ｖ１を判定部５３に出力する。 The AD converter 52 converts the voltage of the IO power supply line 4 as an analog signal input from the step-down circuit 51 into the IO power supply voltage value V1 as a digital signal. The AD converter 52 outputs the IO power supply voltage value V1 to the determination unit 53.
　判定部５３は、ＡＤコンバータ５２から取得したＩＯ電源電圧値Ｖ１に基づき、ＩＯ電力の供給状態を判定する。例えば、判定部５３は、ＩＯ電源電圧値Ｖ１が所定の第１閾値以上である場合、ＩＯ電源ライン４にＩＯ電力が正常に供給されている第１状態であると判定する。判定部５３は、ＩＯ電源電圧値Ｖ１が所定の第１閾値より小さい所定の第２閾値以上かつ所定の第１閾値未満である場合、ＩＯ電源ライン４にＩＯ電力が供給されているが、電圧降下が生じている第２状態であると判定する。判定部５３は、ＩＯ電源電圧値Ｖ１が所定の第２閾値未満である場合、ＩＯ電源ライン４にＩＯ電力が正常に供給されていない第３状態であると判定する。所定の第２閾値は、例えば外部接続機器の電源電圧仕様範囲の下限値に設定される。所定の第１閾値および所定の第２閾値は、外部接続機器の電源電圧仕様範囲に応じて任意に設定されてもよい。判定部５３は、ＩＯ電力の供給状態の判定結果を表示制御部５４および通知部５５に出力する。判定部５３は、例えばＩＯユニット２０Ａの内部処理回路（ＭＰＵ）である。 The determination unit 53 determines the IO power supply state based on the IO power supply voltage value V1 acquired from the AD converter 52. For example, when the IO power supply voltage value V1 is equal to or higher than a predetermined first threshold value, the determination unit 53 determines that the IO power supply line 4 is in the first state in which the IO power is normally supplied. When the IO power supply voltage value V1 is equal to or more than a predetermined second threshold value smaller than a predetermined first threshold value and less than a predetermined first threshold value, the determination unit 53 supplies IO power to the IO power supply line 4, but the voltage It is determined that the second state is a descent. When the IO power supply voltage value V1 is less than a predetermined second threshold value, the determination unit 53 determines that the IO power supply line 4 is in a third state in which the IO power is not normally supplied. The predetermined second threshold value is set, for example, to the lower limit value of the power supply voltage specification range of the externally connected device. The predetermined first threshold value and the predetermined second threshold value may be arbitrarily set according to the power supply voltage specification range of the externally connected device. The determination unit 53 outputs the determination result of the IO power supply state to the display control unit 54 and the notification unit 55. The determination unit 53 is, for example, an internal processing circuit (MPU) of the IO unit 20A.
　表示制御部５４は、判定部５３から取得した判定結果に基づき、表示部（図示せず）の表示制御を行う。例えば、表示部は、ＩＯユニット２０Ａに設けられたＬＥＤであり、表示制御部５４は、ＬＥＤ表示回路である。この場合、表示制御部５４は、判定部５３からＩＯ電力が正常に供給されている第１状態であるとの判定結果を取得したとき、緑色ＬＥＤを点灯させる。表示制御部５４は、判定部５３からＩＯ電力が供給されているが、電圧降下が生じている第２状態であるとの判定結果を取得したとき、緑色ＬＥＤを点滅させる。表示制御部５４は、判定部５３からＩＯ電源ライン４にＩＯ電力が正常に供給されていない第３状態であるとの判定結果を取得したとき、赤色ＬＥＤを点灯させる。このような構成により、表示制御部５４は、ユーザにＩＯ電力の供給状態を報知することができる。なお、ＩＯ電源２の供給状態に基づく表示部の表示方法としてはこれに限定されるものではない。 The display control unit 54 controls the display of the display unit (not shown) based on the determination result acquired from the determination unit 53. For example, the display unit is an LED provided in the IO unit 20A, and the display control unit 54 is an LED display circuit. In this case, the display control unit 54 turns on the green LED when it obtains the determination result that the IO power is normally supplied from the determination unit 53 in the first state. The display control unit 54 blinks the green LED when it obtains a determination result that the IO power is supplied from the determination unit 53 but the voltage drop is occurring in the second state. The display control unit 54 turns on the red LED when the determination unit 53 obtains the determination result that the IO power is not normally supplied to the IO power supply line 4 in the third state. With such a configuration, the display control unit 54 can notify the user of the supply state of IO power. The display method of the display unit based on the supply state of the IO power supply 2 is not limited to this.
　通知部５５は、判定部５３から取得した判定結果に基づき、通信ライン６を介して通信カプラユニット１０の通信部に通知を行う。通信カプラユニット１０の通信部は、コントローラに当該判定結果を通知する。通知部５５は、例えばバス通信用のＡＳＩＣ（Application Specific Integrated Circuit）である。 The notification unit 55 notifies the communication unit of the communication coupler unit 10 via the communication line 6 based on the determination result acquired from the determination unit 53. The communication unit of the communication coupler unit 10 notifies the controller of the determination result. The notification unit 55 is, for example, an ASIC (Application Specific Integrated Circuit) for bus communication.
　以上の構成により、ＩＯユニットシステム１は、監視部５０を備えることにより、ＩＯ電力の供給状態をＩＯユニット２０Ａにて監視することができる。これにより、監視部５０は、ＩＯ電源ライン４へのＩＯ電力の供給状態の異常を検知することができる。 With the above configuration, the IO unit system 1 is provided with the monitoring unit 50, so that the IO power supply status can be monitored by the IO unit 20A. As a result, the monitoring unit 50 can detect an abnormality in the supply state of IO power to the IO power supply line 4.
　また、監視部５０は、ＩＯ電力の供給状態としてＩＯ電源ライン４の電圧を監視する。そのため、ＩＯ電源ライン４の電流を監視する場合と比較し、多接続または接触不良によるＩＯ電力の電圧降下などについても検知することができる。 Further, the monitoring unit 50 monitors the voltage of the IO power supply line 4 as the supply state of IO power. Therefore, as compared with the case of monitoring the current of the IO power supply line 4, it is possible to detect the voltage drop of the IO power due to multiple connections or poor contact.
　（ＩＯユニット２０Ａによる検知）
　図６は、ＩＯユニット２０ＡによりＩＯ電源２の供給状態の異常を検知する様子を示す図である。図６は、５つのＩＯユニット２０のうち、通信カプラユニット１０から２台目のＩＯユニット２０Ａａおよび通信カプラユニット１０から５台目のＩＯユニット２０Ａｂが監視部５０を備えている例を示している。以下、簡単のために、図６の例示を参照して説明する。 (Detection by IO unit 20A)
FIG. 6 is a diagram showing how the IO unit 20A detects an abnormality in the supply state of the IO power supply 2. FIG. 6 shows an example in which the communication coupler unit 10 to the second IO unit 20Aa and the communication coupler unit 10 to the fifth IO unit 20Ab include the monitoring unit 50 among the five IO units 20. .. Hereinafter, for the sake of simplicity, the description will be made with reference to the example of FIG.
　図６に示すように、ＩＯユニット２０Ａａの監視部５０がＩＯ電力の供給状態に異常はないと判定し、ＩＯユニット２０Ａｂの監視部５０がＩＯ電力の供給状態に異常があると判定した場合、ＩＯユニット２０ＡａとＩＯユニット２０Ａｂとの間にＩＯ電力の供給状態の異常の原因が有ることが分かる。また、ＩＯユニットシステム１は、後述するエンドユニットに監視部５０を備える構成と比較し、複数のＩＯユニット２０Ａを備えることで、ＩＯ電力の供給状態の異常の原因を特定することが容易である。 As shown in FIG. 6, when the monitoring unit 50 of the IO unit 20Aa determines that there is no abnormality in the IO power supply state, and the monitoring unit 50 of the IO unit 20Ab determines that there is an abnormality in the IO power supply state, It can be seen that there is a cause of abnormality in the supply state of IO power between the IO unit 20Aa and the IO unit 20Ab. Further, the IO unit system 1 is provided with a plurality of IO units 20A as compared with a configuration in which the monitoring unit 50 is provided in the end unit described later, so that it is easy to identify the cause of the abnormality in the IO power supply state. ..
　また、複数のＩＯユニット２０のうち一部のＩＯユニットのみが監視部５０を備えていてもよい。一部のＩＯユニットのみが監視部５０を備える構成により、コストを掛けることなくＩＯ電力の供給状態の異常を検知することができる。 Further, only a part of the IO units 20 among the plurality of IO units 20 may be provided with the monitoring unit 50. Since only some IO units are provided with the monitoring unit 50, it is possible to detect an abnormality in the IO power supply state at no cost.
　〔実施形態２〕
　本発明の他の実施形態について、以下に説明する。なお、説明の便宜上、上記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。 [Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.
　（エンドユニット３０Ａの構成）
　図７は、本発明の他の実施形態に係るエンドユニット３０Ａの要部構成の一例を示すブロック図である。図７に示すように、エンドユニット３０Ａは、コネクタ３２と、内部電源回路３３と、監視部５０とを備える。コネクタ３２には、ＩＯ電源入力端子３２１とユニット電源入力端子３２２と通信用端子（図示せず）とが設けられている。エンドユニット３０は、コネクタ３２を介して、互いに連結された複数のＩＯユニットの終端側に接続されている。具体的には、対応する端子（ＩＯ電源出力端子２３１とＩＯ電源入力端子３２１、ユニット電源出力端子２３２とユニット電源入力端子３２２）が接続するように、ＩＯユニット２０の下位側コネクタ２３とエンドユニット３０のコネクタ３２とが接続されている。 (Configuration of end unit 30A)
FIG. 7 is a block diagram showing an example of a main configuration of the end unit 30A according to another embodiment of the present invention. As shown in FIG. 7, the end unit 30A includes a connector 32, an internal power supply circuit 33, and a monitoring unit 50. The connector 32 is provided with an IO power input terminal 321 and a unit power input terminal 322, and a communication terminal (not shown). The end unit 30 is connected to the terminal side of a plurality of IO units connected to each other via the connector 32. Specifically, the lower connector 23 and the end unit of the IO unit 20 are connected so that the corresponding terminals (IO power output terminal 231 and IO power input terminal 321 and unit power output terminal 232 and unit power input terminal 322) are connected. The connector 32 of 30 is connected.
　内部電源回路３３は、ユニット電源入力端子３２２とユニット電源ライン８により接続されている。また、内部電源回路３３は、監視部５０とユニット電源ライン８により接続されている。このような構成により、エンドユニット３０Ａに供給されるユニット電力によって監視部５０は駆動する。 The internal power supply circuit 33 is connected to the unit power supply input terminal 322 by the unit power supply line 8. Further, the internal power supply circuit 33 is connected to the monitoring unit 50 by a unit power supply line 8. With such a configuration, the monitoring unit 50 is driven by the unit power supplied to the end unit 30A.
　エンドユニット３０Ａの監視部５０の構成は、実施形態１に係るＩＯユニット２０Ａの監視部５０と同様である。なお、降圧回路５１は、ＩＯ電源入力端子３２１とＩＯ電源ライン７（第２電源ライン）により接続されている。降圧回路５１は、ＩＯ電源ライン７の電圧を取得し、当該電圧を降圧する。 The configuration of the monitoring unit 50 of the end unit 30A is the same as that of the monitoring unit 50 of the IO unit 20A according to the first embodiment. The step-down circuit 51 is connected to the IO power input terminal 321 by an IO power supply line 7 (second power supply line). The step-down circuit 51 acquires the voltage of the IO power supply line 7 and steps down the voltage.
　（エンドユニット３０Ａによる検知）
　図８は、エンドユニット３０ＡによりＩＯ電力の供給状態の異常を検知する様子を示す図である。図８は、４つのＩＯユニット２０の終端側にエンドユニット３０Ａが接続されている例を示している。以下、簡単のために、図８の例示を参照して説明する。 (Detection by end unit 30A)
FIG. 8 is a diagram showing how the end unit 30A detects an abnormality in the IO power supply state. FIG. 8 shows an example in which the end unit 30A is connected to the terminal side of the four IO units 20. Hereinafter, for the sake of simplicity, the description will be made with reference to the example of FIG.
　図８に示すように、複数のＩＯユニット２０のいずれかにおいてＩＯ電力の供給状態の異常があった場合、監視部５０は、ＩＯ電力の供給状態の異常を検知することができる。 As shown in FIG. 8, when there is an abnormality in the IO power supply state in any of the plurality of IO units 20, the monitoring unit 50 can detect the abnormality in the IO power supply state.
　〔ソフトウェアによる実現例〕
　監視部５０の制御ブロック（特に判定部５３、表示制御部５４、および通知部５５）は、集積回路（ＩＣチップ）等に形成された論理回路（ハードウェア）によって実現してもよいし、ソフトウェアによって実現してもよい。 [Example of realization by software]
The control block (particularly the determination unit 53, the display control unit 54, and the notification unit 55) of the monitoring unit 50 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or software. It may be realized by.
　後者の場合、監視部５０は、各機能を実現するソフトウェアであるプログラムの命令を実行するコンピュータを備えている。このコンピュータは、例えば１つ以上のプロセッサを備えていると共に、上記プログラムを記憶したコンピュータ読み取り可能な記録媒体を備えている。そして、上記コンピュータにおいて、上記プロセッサが上記プログラムを上記記録媒体から読み取って実行することにより、本発明の目的が達成される。上記プロセッサとしては、例えばＣＰＵ（Central Processing Unit）を用いることができる。上記記録媒体としては、「一時的でない有形の媒体」、例えば、ＲＯＭ（Read Only Memory）等の他、テープ、ディスク、カード、半導体メモリ、プログラマブルな論理回路などを用いることができる。また、上記プログラムを展開するＲＡＭ（Random Access Memory）などをさらに備えていてもよい。また、上記プログラムは、該プログラムを伝送可能な任意の伝送媒体（通信ネットワークや放送波等）を介して上記コンピュータに供給されてもよい。なお、本発明の一態様は、上記プログラムが電子的な伝送によって具現化された、搬送波に埋め込まれたデータ信号の形態でも実現され得る。
　（まとめ） In the latter case, the monitoring unit 50 includes a computer that executes instructions of a program that is software that realizes each function. The computer includes, for example, one or more processors and a computer-readable recording medium that stores the program. Then, in the computer, the processor reads the program from the recording medium and executes it, thereby achieving the object of the present invention. As the processor, for example, a CPU (Central Processing Unit) can be used. As the recording medium, a "non-temporary tangible medium", for example, a ROM (Read Only Memory) or the like, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. Further, a RAM (Random Access Memory) for expanding the above program may be further provided. Further, the program may be supplied to the computer via an arbitrary transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. It should be noted that one aspect of the present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the above program is embodied by electronic transmission.
(summary)
　上記の課題を解決するために、本発明の一態様に係るＩＯユニットは、接続された他のＩＯユニットから、第１電力を受け取る第１電源入力端子と、電源ポートに接続されたデバイスに前記第１電力を供給する前記電源ポートと、前記第１電源端子と前記電源ポートとを接続する電源ラインと、前記電源ラインの電圧を測定することにより前記電源ラインに前記第１電力が供給されているか否かを監視する監視部とを備える。 In order to solve the above problems, the IO unit according to one aspect of the present invention is attached to a first power input terminal that receives first power from another connected IO unit and a device connected to the power port. The first power is supplied to the power supply line by measuring the voltage of the power supply port for supplying the first power, the power supply line connecting the first power supply terminal and the power supply port, and the power supply line. It is equipped with a monitoring unit that monitors whether or not it is present.
　上記構成によれば、ＩＯユニットは、監視部を備えることにより、第１電力の供給状態を監視することができる。これにより、監視部は、電源ラインへの第１電力の供給状態の異常を検知することができる。また、監視部は、第１電力の供給状態として電源ラインの電圧を監視する。そのため、電源ラインの電流を監視する場合と比較し、多接続または接触不良による第１電力の電圧降下についても検知することができる。それゆえ、多接続または接触不良を検出することができる。 According to the above configuration, the IO unit can monitor the supply state of the first power by providing the monitoring unit. As a result, the monitoring unit can detect an abnormality in the supply state of the first power to the power supply line. Further, the monitoring unit monitors the voltage of the power supply line as the supply state of the first electric power. Therefore, as compared with the case of monitoring the current of the power supply line, it is possible to detect the voltage drop of the first power due to multiple connections or poor contact. Therefore, multiple connections or poor contact can be detected.
　また、前記監視部は、前記電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果に基づきユーザに前記第１電力の供給状態を表示する表示制御部と、を備えてもよい。 Further, the monitoring unit includes a determination unit that determines whether or not the first power is supplied to the power supply line, and a display that displays the supply state of the first power to the user based on the determination result of the determination unit. A control unit may be provided.
　上記構成によれば、表示制御部が第１電力の供給状態をユーザに表示することで、第１電力の供給状態に異常があった場合に、ユーザは容易に異常個所を特定することができる。 According to the above configuration, the display control unit displays the first power supply status to the user, so that when there is an abnormality in the first power supply status, the user can easily identify the abnormal location. ..
　また、前記監視部は、前記電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果を、前記ＩＯユニットを制御するコントローラに通知する通知部と、を備えてもよい。 Further, the monitoring unit includes a determination unit that determines whether or not the first electric power is supplied to the power supply line, and a notification unit that notifies the controller that controls the IO unit of the determination result of the determination unit. , May be provided.
　上記構成によれば、ＩＯユニットを制御するコントローラに第１電力の供給状態を通知することができる。コントローラは、供給状態をユーザに報知することができる。 According to the above configuration, it is possible to notify the controller that controls the IO unit of the supply status of the first power. The controller can notify the user of the supply status.
　また、前記判定部は、前記電源ラインの電圧に対応する値が所定の第１閾値以上である場合、前記電源ラインに前記第１電力が正常に供給されている第１状態であると判定し、前記電源ラインの電圧に対応する値が前記第１閾値より小さい所定の第２閾値以上かつ前記第１閾値未満である場合、前記電源ラインに前記第１電力が十分に供給されているが、電圧降下が生じている第２状態であると判定し、前記電源ラインの電圧に対応する値が前記第２閾値未満である場合、前記電源ラインに前記第１電力が適切に供給されていない第３状態であると判定してもよい。 Further, when the value corresponding to the voltage of the power supply line is equal to or higher than a predetermined first threshold value, the determination unit determines that the first power is normally supplied to the power supply line in the first state. When the value corresponding to the voltage of the power supply line is equal to or more than a predetermined second threshold value smaller than the first threshold value and less than the first threshold value, the first power is sufficiently supplied to the power supply line. If it is determined that the second state has a voltage drop and the value corresponding to the voltage of the power supply line is less than the second threshold value, the first power is not properly supplied to the power supply line. It may be determined that there are three states.
　上記構成によれば、前記電源ラインに前記第１電力が十分に供給されているが、電圧降下が生じている第２状態を検出することができる。それゆえ、ユーザは、問題が生じる前に異常箇所を改善することができる。 According to the above configuration, it is possible to detect a second state in which the first power is sufficiently supplied to the power supply line but a voltage drop occurs. Therefore, the user can improve the abnormal part before the problem occurs.
　また、前記ＩＯユニットは、接続されたさらに他のＩＯユニットへ、前記第１電力を出力する電源出力端子をさらに備え、前記電源ラインは、前記第１電源入力端子と前記電源出力端子とを接続してもよい。 Further, the IO unit further includes a power output terminal for outputting the first power to the other connected IO unit, and the power line connects the first power input terminal and the power output terminal. You may.
　また、前記ＩＯユニットは、接続された前記他のＩＯユニットから第２電力を受け取る第２電源入力端子をさらに備え、前記監視部を構成する回路は、前記第２電力により動作してもよい。 Further, the IO unit further includes a second power input terminal that receives a second power from the other connected IO unit, and the circuit constituting the monitoring unit may operate by the second power.
　上記構成によれば、電源ポートを介してデバイスに供給する第１電力と、監視部を構成する回路を動作させる第２電力とは、当該ＩＯユニットの異なる端子から供給される。そのため、多接続または接触不良による第１電力の電圧降下が生じた場合においても、異なる端子から供給される第２電力により監視部を構成する回路は動作することができる。それゆえ、第１電力が適切に供給されない場合でも、第１電力の供給状態の異常を検出することができる。 According to the above configuration, the first power supplied to the device via the power port and the second power for operating the circuit constituting the monitoring unit are supplied from different terminals of the IO unit. Therefore, even when the voltage drop of the first power occurs due to multiple connections or poor contact, the circuit constituting the monitoring unit can operate by the second power supplied from different terminals. Therefore, even when the first power is not properly supplied, it is possible to detect an abnormality in the supply state of the first power.
　上記の課題を解決するために、本発明の一態様に係るエンドユニットは、互いに連結された複数のＩＯユニットの終端側に接続されるエンドユニットであって、前記ＩＯユニットに接続されたデバイスに第１電力を供給する、前記ＩＯユニットの第１電源ラインに接続される第１電源入力端子と、前記第１電源入力端子に接続されている第２電源ラインと、前記第２電源ラインの電圧を測定することにより前記第２電源ラインに電力が供給されているか否かを監視する監視部とを備える。 In order to solve the above problems, the end unit according to one aspect of the present invention is an end unit connected to the terminal side of a plurality of IO units connected to each other, and is attached to a device connected to the IO unit. The voltage of the first power input terminal connected to the first power line of the IO unit, the second power line connected to the first power input terminal, and the second power line that supply the first power. It is provided with a monitoring unit that monitors whether or not power is being supplied to the second power supply line by measuring.
　上記構成によれば、エンドユニットは、監視部を備えることにより、第１電力の供給状態を監視することができる。これにより、監視部は、電源ラインへの第１電力の供給状態の異常を検知することができる。また、監視部は、第１電力の供給状態として電源ラインの電圧を監視する。そのため、電源ラインの電流を監視する場合と比較し、多接続または接触不良による第１電力の電圧降下などについても検知することができる。また、もともとＩＯユニットの終端側を保護する目的で接続されるエンドユニットが監視部を備える。すなわち、監視部を備える新たな部材を設ける構成より、構造の簡略化を図ることができる。 According to the above configuration, the end unit can monitor the supply state of the first power by providing the monitoring unit. As a result, the monitoring unit can detect an abnormality in the supply state of the first power to the power supply line. Further, the monitoring unit monitors the voltage of the power supply line as the supply state of the first electric power. Therefore, as compared with the case of monitoring the current of the power supply line, it is possible to detect the voltage drop of the first power due to multiple connections or poor contact. In addition, the end unit originally connected for the purpose of protecting the terminal side of the IO unit is provided with a monitoring unit. That is, the structure can be simplified by providing a new member provided with a monitoring unit.
　前記監視部は、前記第２電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果に基づきユーザに前記第１電力の供給状態を表示する表示制御部と、を備えてもよい。 The monitoring unit includes a determination unit that determines whether or not the first power is supplied to the second power supply line, and a display that displays the supply state of the first power to the user based on the determination result of the determination unit. A control unit may be provided.
　前記監視部は、前記第２電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果を、前記ＩＯユニットを制御するコントローラに通知する通知部と、を備えてもよい。 The monitoring unit includes a determination unit that determines whether or not the first power is supplied to the second power supply line, and a notification unit that notifies the controller that controls the IO unit of the determination result of the determination unit. , May be provided.
　前記判定部は、前記第２電源ラインの電圧に対応する値が所定の第１閾値以上である場合、前記第２電源ラインに前記第１電力が正常に供給されている第１状態であると判定し、前記第２電源ラインの電圧に対応する値が前記第１閾値より小さい所定の第２閾値以上かつ前記第１閾値未満である場合、前記第２電源ラインに前記第１電力が供給されているが、電圧降下が生じている第２状態であると判定し、前記第２電源ラインの電圧に対応する値が前記第２閾値未満である場合、前記第２電源ラインに前記第１電力が正常に供給されていない第３状態であると判定してもよい。 When the value corresponding to the voltage of the second power supply line is equal to or higher than a predetermined first threshold value, the determination unit determines that the first power is normally supplied to the second power supply line in the first state. When it is determined that the value corresponding to the voltage of the second power supply line is equal to or more than a predetermined second threshold value smaller than the first threshold value and less than the first threshold value, the first power is supplied to the second power supply line. However, when it is determined that the second state has a voltage drop and the value corresponding to the voltage of the second power supply line is less than the second threshold value, the first power supply is applied to the second power supply line. May be determined to be a third state in which is not normally supplied.
　前記エンドユニットは、前記複数のＩＯユニットの終端側から第２電力を受け取る第２電源入力端子をさらに備え、前記監視部を構成する回路は、前記第２電力により動作してもよい。 The end unit further includes a second power input terminal that receives a second power from the terminal side of the plurality of IO units, and the circuit constituting the monitoring unit may operate by the second power.
　本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.
　１　ＩＯユニットシステム
　２　ＩＯ電源
　３　ユニット電源
　４　ＩＯ電源ライン（第１電源ライン）
　７　ＩＯ電源ライン（第２電源ライン）
　１０　通信カプラユニット
　２０Ａ　ＩＯユニット
　３０Ａ　エンドユニット
　５０　監視部
　５３　判定部
　５４　表示制御部
　５５　通知部
　２１１　電源ポート
　２２１、３２１　ＩＯ電源入力端子（第１電源入力端子）
　２２２、３２２　ユニット電源入力端子（第２電源入力端子）
　２３１　ＩＯ電源出力端子（電源出力端子） 1 IO unit system 2 IO power supply 3 Unit power supply 4 IO power supply line (first power supply line)
7 IO power supply line (second power supply line)
10 Communication coupler unit 20A IO unit 30A End unit 50 Monitoring unit 53 Judgment unit 54 Display control unit 55 Notification unit 211 Power port 221, 321 IO power input terminal (first power input terminal)
222,322 Unit power input terminal (second power input terminal)
231 IO power output terminal (power output terminal)

Claims (11)

  1. 　ＩＯユニットであって、
    　接続された他のＩＯユニットから、第１電力を受け取る第１電源入力端子と、
    　電源ポートに接続されたデバイスに前記第１電力を供給する前記電源ポートと、
    　前記第１電源入力端子と前記電源ポートとを接続する電源ラインと、
    　前記電源ラインの電圧を測定することにより前記電源ラインに前記第１電力が供給されているか否かを監視する監視部とを備えるＩＯユニット。     It ’s an IO unit,
    The first power input terminal that receives the first power from other connected IO units,
    The power port that supplies the first power to the device connected to the power port,
    A power supply line connecting the first power input terminal and the power port,
    An IO unit including a monitoring unit that monitors whether or not the first electric power is supplied to the power supply line by measuring the voltage of the power supply line.
  2. 　前記監視部は、前記電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果に基づきユーザに前記第１電力の供給状態を表示する表示制御部と、を備える、請求項１に記載のＩＯユニット。 The monitoring unit includes a determination unit that determines whether or not the first power is supplied to the power supply line, and a display control unit that displays the supply state of the first power to the user based on the determination result of the determination unit. The IO unit according to claim 1, further comprising.
  3. 　前記監視部は、前記電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果を、前記ＩＯユニットを制御するコントローラに通知する通知部と、を備える、請求項１に記載のＩＯユニット。 The monitoring unit includes a determination unit that determines whether or not the first electric power is supplied to the power supply line, and a notification unit that notifies the controller that controls the IO unit of the determination result of the determination unit. The IO unit according to claim 1.
  4. 　前記判定部は、
    　　前記電源ラインの電圧に対応する値が所定の第１閾値以上である場合、前記電源ラインに前記第１電力が正常に供給されている第１状態であると判定し、
    　　前記電源ラインの電圧に対応する値が前記第１閾値より小さい所定の第２閾値以上かつ前記第１閾値未満である場合、前記電源ラインに前記第１電力が供給されているが、電圧降下が生じている第２状態であると判定し、
    　　前記電源ラインの電圧に対応する値が前記第２閾値未満である場合、前記電源ラインに前記第１電力が正常に供給されていない第３状態であると判定する、請求項２または３に記載のＩＯユニット。     The determination unit
    When the value corresponding to the voltage of the power supply line is equal to or higher than a predetermined first threshold value, it is determined that the first power is normally supplied to the power supply line in the first state.
    When the value corresponding to the voltage of the power supply line is equal to or more than a predetermined second threshold value smaller than the first threshold value and less than the first threshold value, the first power is supplied to the power supply line, but the voltage drop occurs. Judging that it is the second state that has occurred,
    According to claim 2 or 3, when the value corresponding to the voltage of the power supply line is less than the second threshold value, it is determined that the first power is not normally supplied to the power supply line. IO unit.
  5. 　接続されたさらに他のＩＯユニットへ、前記第１電力を出力する電源出力端子をさらに備え、
    　前記電源ラインは、前記第１電源入力端子と前記電源出力端子とを接続する、請求項１から４のいずれか１項に記載のＩＯユニット。     Further, a power output terminal for outputting the first power to another connected IO unit is further provided.
    The IO unit according to any one of claims 1 to 4, wherein the power supply line connects the first power supply input terminal and the power supply output terminal.
  6. 　接続された前記他のＩＯユニットから第２電力を受け取る第２電源入力端子をさらに備え、
    　前記監視部を構成する回路は、前記第２電力により動作する、請求項１から５のいずれか１項に記載のＩＯユニット。     Further provided with a second power input terminal that receives second power from the other connected IO unit.
    The IO unit according to any one of claims 1 to 5, wherein the circuit constituting the monitoring unit is operated by the second electric power.
  7. 　互いに連結された複数のＩＯユニットの終端側に接続されるエンドユニットであって、
    　前記ＩＯユニットに接続されたデバイスに第１電力を供給する、前記ＩＯユニットの第１電源ラインに接続される第１電源入力端子と、
    　前記第１電源入力端子に接続されている第２電源ラインと、
    　前記第２電源ラインの電圧を測定することにより前記第２電源ラインに電力が供給されているか否かを監視する監視部とを備えるエンドユニット。     An end unit connected to the end side of multiple IO units connected to each other.
    A first power input terminal connected to the first power line of the IO unit, which supplies the first power to the device connected to the IO unit,
    The second power supply line connected to the first power supply input terminal and
    An end unit including a monitoring unit that monitors whether or not power is being supplied to the second power supply line by measuring the voltage of the second power supply line.
  8. 　前記監視部は、前記第２電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果に基づきユーザに前記第１電力の供給状態を表示する表示制御部と、を備える、請求項７に記載のエンドユニット。 The monitoring unit includes a determination unit that determines whether or not the first power is supplied to the second power supply line, and a display that displays the supply state of the first power to the user based on the determination result of the determination unit. The end unit according to claim 7, further comprising a control unit.
  9. 　前記監視部は、前記第２電源ラインに前記第１電力が供給されているか否かを判定する判定部と、前記判定部の判定結果を、前記ＩＯユニットを制御するコントローラに通知する通知部と、を備える、請求項７に記載のエンドユニット。 The monitoring unit includes a determination unit that determines whether or not the first power is supplied to the second power supply line, and a notification unit that notifies the controller that controls the IO unit of the determination result of the determination unit. 7. The end unit according to claim 7.
  10. 　前記判定部は、
    　　前記第２電源ラインの電圧に対応する値が所定の第１閾値以上である場合、前記第２電源ラインに前記第１電力が正常に供給されている第１状態であると判定し、
    　　前記第２電源ラインの電圧に対応する値が前記第１閾値より小さい所定の第２閾値以上かつ前記第１閾値未満である場合、前記第２電源ラインに前記第１電力が供給されているが、電圧降下が生じている第２状態であると判定し、
    　　前記第２電源ラインの電圧に対応する値が前記第２閾値未満である場合、前記第２電源ラインに前記第１電力が正常に供給されていない第３状態であると判定する、請求項８または９に記載のエンドユニット。     The determination unit
    When the value corresponding to the voltage of the second power supply line is equal to or higher than a predetermined first threshold value, it is determined that the first power supply is normally supplied to the second power supply line in the first state.
    When the value corresponding to the voltage of the second power supply line is equal to or more than a predetermined second threshold value smaller than the first threshold value and less than the first threshold value, the first power is supplied to the second power supply line. , Judged that it is the second state where the voltage drop is occurring,
    8. When the value corresponding to the voltage of the second power supply line is less than the second threshold value, it is determined that the first power supply is not normally supplied to the second power supply line in the third state. Or the end unit according to 9.
  11. 　前記複数のＩＯユニットの終端側から第２電力を受け取る第２電源入力端子をさらに備え、
    　前記監視部を構成する回路は、前記第２電力により動作する、請求項７から１０のいずれか１項に記載のエンドユニット。     Further provided with a second power input terminal that receives second power from the terminal side of the plurality of IO units.
    The end unit according to any one of claims 7 to 10, wherein the circuit constituting the monitoring unit is operated by the second electric power.
PCT/JP2021/008764 2021-01-18 2021-03-05 Io unit and end unit WO2022153559A1 (en)

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Citations (6)

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JP2007312573A (en) * 2006-05-19 2007-11-29 Omron Corp Io unit in safety controller of building block type
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JP2012252483A (en) * 2011-06-02 2012-12-20 Yokogawa Electric Corp I/o module and duplex system using the same
WO2014155697A1 (en) * 2013-03-29 2014-10-02 三菱電機株式会社 Plc system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002108417A (en) * 2000-09-29 2002-04-10 Keyence Corp Extension-type plc system and calling unit, reception unit and end unit, which are incorporated in the same
JP2006190295A (en) * 2001-05-21 2006-07-20 Omron Corp Network configurator, network power supply monitor system and network power supply monitor method
JP2007312573A (en) * 2006-05-19 2007-11-29 Omron Corp Io unit in safety controller of building block type
US20120297101A1 (en) * 2009-11-23 2012-11-22 Abb Ag Safety module for an automation device
JP2012252483A (en) * 2011-06-02 2012-12-20 Yokogawa Electric Corp I/o module and duplex system using the same
WO2014155697A1 (en) * 2013-03-29 2014-10-02 三菱電機株式会社 Plc system

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