Title:
STATE DISPLAY DEVICE FOR PROGRAMMABLE CONTROLLER
Document Type and Number:
Japanese Patent JPS62272304
Kind Code:
A
Abstract:
PURPOSE:To display the first trouble factor for the occurrence of trouble with one switch operation by providing a state display part with a state signal memory and a trigger circuit of a memory and switching state signals and the state signal memory by a switch to display the state. CONSTITUTION:In a trigger circuit 8, a trigger signal 8a is outputted when any of state signals 3a-3n is abnormal, and state signals 3a-3n at this time are stored in a memory. If a display changeover switch 9 is turned off in this state, a gate circuit 10 is closed and a gate circuit 11 is opened to display the state of a state signal memory 7 on a state display LED part 4, and only the first trouble factor is displayed. If the display change over switch 9 is turned on, current state signals are displayed. If a memory reset switch 8c is turned on, a memory reset signal 8b is outputted and the state signal memory 7 is reset.
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Inventors:
MAEKAWA AKIHIKO
Application Number:
JP11486586A
Publication Date:
November 26, 1987
Filing Date:
May 21, 1986
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G05B23/02; G05B19/02; G05B19/048; G05B19/05; (IPC1-7): G05B19/02; G05B23/02
Attorney, Agent or Firm:
Hiroaki Tazawa