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plc system

A terminal unit and voltage value technology, applied in the field of programmable logic controller system, can solve problems such as insufficient voltage

Inactive Publication Date: 2017-08-25
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the red light indicates that the voltage value is lower than the specified value, and the voltage required for the normal operation of the system is insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] figure 1 It is a figure which schematically shows an example of the structure of the PLC system concerning Embodiment 1. The PLC system 1 has a unit direct connection type structure and includes one basic module 10 . The basic module 10 has: a power supply unit 11, which supplies power to each unit; a CPU unit 12, which manages the entire system; target units 13-1 to 13-4, which are input and output units and other units with other functions; And an end cover (end cover) 14, which represents the end of the module, is an end unit for performing end processing of the module. All units (also including end caps 14) are connected by a bus (bus connector). Through this bus, it is possible to communicate between the units, and to supply voltage from the power supply unit 11 to other units. In addition, although the case where four target units 13-1 to 13-4 are arrange|positioned was shown in this example, it is not limited to this.

[0029] In Embodiment 1, CPU unit 12 has...

Embodiment approach 2

[0057] In Embodiment 1, the case where the PLC system was comprised only by the basic module was shown, and in Embodiment 2, the case where the PLC system was comprised by the basic module and the extension module was shown.

[0058] Figure 7 It is a figure which schematically shows an example of the structure of the PLC system concerning Embodiment 2. The PLC system 1 has one basic module 10 and an extension module 20 connected to the basic module 10 via an extension cable 30 .

[0059] The basic module 10 includes a power supply unit 11 , a CPU unit 12 , target units 13 - 1 to 13 - 3 , an end cover 14 , and a branch unit 15 . The branch unit 15 is installed at an arbitrary position between the CPU unit 12 and the end cover 14 when adding modules other than the basic module 10 . The branch unit 15 includes the voltage monitoring unit 50 described in the first embodiment.

[0060] The extension module 20 has: the extension unit 21 as a start terminal as a connection part o...

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PUM

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Abstract

In the PLC system, a power supply unit, a CPU unit, a first terminal unit arranged at a terminal end with respect to the power supply unit, and other units are connected via connectors, and the other units and the first terminal unit are equipped with measurement and storage capabilities. A voltage measurement unit for a voltage value supplied to the unit, wherein the CPU unit includes a voltage measurement unit that measures and stores the voltage value supplied to the unit, and a voltage monitoring management unit that performs a voltage value acquisition process, The result of the voltage value acquisition process that reads the voltage stored in the voltage measurement part of the first terminal unit, the other unit, or the own unit is displayed in numerical form on the display unit value, determine whether the voltage value is greater than or equal to a predetermined value, and the voltage monitoring management unit executes the voltage value acquisition process from the first terminal unit toward the power supply unit side until the voltage value becomes Units greater than or equal to the specified value.

Description

technical field [0001] The present invention relates to a programmable logic controller (Programmable Logic Controller, hereinafter referred to as PLC) system of unit direct connection type. Background technique [0002] The basic module of the existing unit direct connection type PLC system has the following structure, that is, the power supply unit is arranged at the head end, the CPU unit is connected to the power supply unit, and after the CPU unit, input and output units and units with other functions are connected. , a branch unit used when the end is connected to an end cap or when adding a system. When using only the basic module and the units are insufficient, use the extension module. The extension module has a structure in which an extension unit is arranged at the beginning, followed by the extension unit, connected with input / output units and units with other functions, and connected with an end cover or a branch unit used when extending the system at the end. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/058G05B2219/15097G06F1/26
Inventor 川名达
Owner MITSUBISHI ELECTRIC CORP