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Controller, controlling method and program storage medium

A control device and program technology, applied to program control in sequence/logic controllers, components of lighting devices, signaling devices, etc.

Inactive Publication Date: 2003-12-03
NIPPON SANSO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned PLC of the alarm system is a ladder-only PLC, so when changing the control operation of the PLC, for example, the program dedicated to the ladder-only PLC must be rewritten.
In addition, although the rewriting of the control program requires the operator using the alarm system to designate the place to be changed in the program, it is not a sure method for the operator to rewrite the general control program.
In addition, in order to rewrite the control program, it is necessary to temporarily stop the PLC, and accordingly, the alarm system must be temporarily stopped.

Method used

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  • Controller, controlling method and program storage medium
  • Controller, controlling method and program storage medium
  • Controller, controlling method and program storage medium

Examples

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Embodiment Construction

[0027] A control device according to an embodiment of the present invention will be described below with reference to the drawings.

[0028] figure 1 A schematic block diagram showing the structure of an alarm system using the same control device. This alarm system, when the alarm sensors monitoring the state of tanks and pumps in the factory exceeds a certain reference value, the abnormality of the tank or pump will be sent to the control device as an alarm signal, and the control device will output according to the alarm signal , to take countermeasures against the abnormality of the tank or pump.

[0029] Symbol 10 is a control device in this figure. 20 is an alarm sensor for monitoring the states of tanks and pumps (alarm targets). 30 is a passive device such as an alarm device or a red light that is operated by an output signal of the control device 10 based on a warning signal from the alarm sensor 20 . 40 is a manager terminal connected via the control device 10 and...

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PUM

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Abstract

To provide a controller for changing the control operation of the controller, without having to rewrite the control program. A processing-setting contents storage file which is generated through the use of a point list prepared by spreadsheet software, and an I / O list is converted in data by a file-converting part, and stored in a storage part. Then, an alarm control processing part performs a control processing, based on the data.

Description

technical field [0001] The present invention relates to a control device, a control method and a program thereof, which are used to control the output signal of countermeasure processing according to the alarm signal when the alarm object is abnormal. Background technique [0002] The alarm system installed in the known chemical product manufacturing plants etc. uses a sequencer (sequencer) called PLC (Programmable Logic Controller) to trigger alarms based on the output from various alarm sensors. Control countermeasures are dealt with. [0003] However, the above-mentioned PLC for the alarm system is a ladder-only PLC, so when changing the control operation of the PLC, for example, the program dedicated to the ladder-only PLC must be rewritten. In addition, although the rewriting of the control program is performed by the operator using the alarm system by specifying the place to be changed in the program, it is not a sure method for the operator to rewrite the general con...

Claims

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Application Information

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IPC IPC(8): G08B21/00G05B19/05G06F9/06G06F12/02
CPCB60Q7/00F21L4/08F21S9/022F21V23/06F21V33/0076F21Y2101/00F21Y2115/10G08B5/006
Inventor 稻叶健一郎坂田康通石田诚高桥和雄
Owner NIPPON SANSO CORP
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