Title:
PROCESS FAULT MONITORING METHOD BY PROGRAMMABLE CONTROLLER
Document Type and Number:
Japanese Patent JP3488903
Kind Code:
B2
Abstract:
PURPOSE: To provide a fault monitoring method which facilitates program modifying operation accompanying the increase or decrease in the number of fault points, etc., shortens the programming time that a programmer spends, and improve the maintainability.
CONSTITUTION: The programmable controller is equipped with a fault signal registering means 101 which registers a fault detection bit 104 of a process, a fault confirmation bit 105 and a fault reset bit 106 by an operator, a fault detection storage bit 107, a fault nonconfirmation storage bit 108 which stores that the operator does not confirms fault occurrence, and a fault confirmation storage bit 109 which stores that the fault occurrence is confirmed, and a fault signal registration data storage part 102 having a buffer which stores the bit numbers of the respective bits and a state transition status showing the current state of fault monitor process state transition; and fault monitoring is carried out according to the fault monitor state transition changing with a 9-step procedure.
Inventors:
Hiroshi Yoshizuka
Application Number:
JP12425295A
Publication Date:
January 19, 2004
Filing Date:
April 24, 1995
Export Citation:
Assignee:
Yaskawa Electric Co., Ltd.
International Classes:
G05B19/05; G05B19/048; G05B23/02; (IPC1-7): G05B19/048; G05B23/02
Domestic Patent References:
| JP2253308A | ||||
| JP5233982A | ||||
| JP330957Y2 |
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