JPS63153426U

JPS63153426U -

Info

Publication number: JPS63153426U
Application number: JP4580887U
Authority: JP
Priority date: 1987-03-30
Filing date: 1987-03-30
Publication date: 1988-10-07

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す回路図、第２
図は本考案の一実施例のプログラマブルコントロ
ーラの入力及び出力の内部回路の一部を示す図、
第３図はプログラマブルコントローラの論理シー
ケンスを示す論理図、第４図はキープリレ回路の
回路図である。１……条件、１ａ……常開接点、１ｂ……常閉
接点、２……キープリレ、２Ｓ……動作コイル、
２Ｒ……復帰コイル、２ａ……常開接点、２ｂ…
…常閉接点、Ｐ……電源正極、Ｎ……電源負極、
３……プログラマブルコントローラ、３ａ，３ｂ
，３ｃ，３ｄ，３ｅ……入力、３ｆ……出力、４
ａ……復帰スイツチの常開接点、５……補助リレ
のコイル、５ｂ……常閉接点、６……フオトカプ
ラ、７―１，７―２……分圧抵抗、８……出力回
路のリレコイル、８ａ……常開接点。 Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a diagram showing a part of the input and output internal circuits of a programmable controller according to an embodiment of the present invention.
FIG. 3 is a logic diagram showing the logic sequence of the programmable controller, and FIG. 4 is a circuit diagram of the keep relay circuit. 1...Condition, 1a...Normally open contact, 1b...Normally closed contact, 2...Keep relay, 2S...Operating coil,
2R...Return coil, 2a...Normally open contact, 2b...
...Normally closed contact, P...Power supply positive pole, N...Power supply negative pole,
3...Programmable controller, 3a, 3b
, 3c, 3d, 3e...input, 3f...output, 4
a...Normally open contact of return switch, 5...Auxiliary relay coil, 5b...Normally closed contact, 6...Photo coupler, 7-1, 7-2...Voltage dividing resistor, 8...Relay coil of output circuit , 8a... Normally open contact.

Claims

[Scope of utility model registration request]

A controller that is connected to both terminals of the operating coil and both terminals of the return coil of a keep relay having a self-switching contact to stop excitation to the coil after switching, and that determines whether the self-switching contact has operated correctly based on these inputs. , an auxiliary relay which operates to open a normally closed contact which is energized by the output from the controller and stops excitation of the keep-relay circuit when a malfunction is confirmed as a result of the determination by the controller; monitoring equipment.