JPS59165007U

JPS59165007U - Sequence controller abnormality detection device

Info

Publication number: JPS59165007U
Application number: JP5834783U
Authority: JP
Inventors: 吉丸　五郎
Original assignee: 株式会社明電舎
Priority date: 1983-04-19
Filing date: 1983-04-19
Publication date: 1984-11-06

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はシーケンス制御システムにおける従来の異常監
視方法を説明するためのブロック図、第２図は本考案に
係るシーケンスコント、ローラの異常検出装置の一実施
例を示す回路図、第３図Ａ乃至第３図Ｃ及び第４図Ａ乃
至第４図Ｃは第２図に示されるシーケンスコントローラ
の正常動作時の各部の動作波形を示すタイミングチャー
トである。FIG. 1 is a block diagram for explaining a conventional abnormality monitoring method in a sequence control system, FIG. 2 is a circuit diagram showing an embodiment of a sequence control and roller abnormality detection device according to the present invention, and FIG. 3A 3C to 3C and FIGS. 4A to 4C are timing charts showing operating waveforms of various parts of the sequence controller shown in FIG. 2 during normal operation.

Claims

[Scope of utility model registration request]

(1) In a system that performs sequence control of external equipment to be controlled based on control commands sent by a computer-configured sequence controller via its interface unit, signals input and output between the sequence controller and external equipment An abnormality monitoring means for monitoring is provided in the sequence controller, and a means for detecting an abnormality based on the monitoring output from the abnormality monitoring means is provided on the external equipment side, and the abnormality monitoring means is set to a predetermined ON-OFF state.
comprising a first means for generating an output, and a second means for generating a monitoring output based on the output of the first means and a signal input from the abnormality detection means in response to the output,
An abnormality in a sequence controller characterized in that when the monitoring output from the second means does not occur for a predetermined time or longer or continues for a predetermined time or more, the abnormality detecting means recognizes the abnormality and generates an output to an alarm circuit. Detection device.

(2) The abnormality detection device for a sequence controller as set forth in claim (1), wherein the first means is two timers each having a predetermined time limit that are started sequentially.

(3) The monitoring output generated by the second means rises in response to the relay outputs generated as the two timer outputs, and rises in response to the auxiliary relay output provided in the abnormality detection means and responsive to the relay output. An abnormality detection device for a sequence controller according to claim (2) of the utility model registration, characterized in that the abnormality detection device falls.

(4) Utility model registration characterized in that the abnormality detection means has an external timer that operates when the auxiliary relay output does not occur for a predetermined period of time or continues for a predetermined period of time or more and generates an output to an alarm circuit. Claim No. 3
) Abnormality detection device for the sequence controller described in section 2.