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EP0141858A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Alarm display method for programmable controller

Assignee: Fanuc Corp
•
Filing: 1984-04-06
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Granted: —
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Expires: 2004-04-06
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Abstract

Abstract An alarm display method for a programmable sequence controller which is applied to, for example, a numerical control apparatus makes it possible to detect any failure in a machine as quickly as possible, and effect a speedy and optimum repair operation. A numerical control apparatus (1) is composed of a processor (101 d), a transmitter-receiver unit (101e), a pulse distribution calculation circuit (101f), a manual data input device (101h), a display (101i), etc. A programmable controller(2) controls, forexample, a machine element of a machine tool in response to a command or the like from the numerical control apparatus (1), according to a predetermined sequence program. The programmable controller (2) is provided with a memory (202a) which holds the sequence program,a, data input/output unit (202c), a processor (202e), a transmitter-receiver unit (202f), etc. The processor (202e) executes the sequence program, and, when an alarm is detected, a ladder portion relating to the alarm is displayed on the display (101i) according to alarm message data in the sequence program.

Inventors

  • 👤 Katsuaki Kusumi
  • 👤 Yoshihiro Nakashima

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 00:03
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/05; G05B19/058; G05B19/18; G05B19/414; G05B19/4147; G05B2219/00; G05B2219/10; G05B2219/13; G05B2219/13048

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 116 words
In a programmable controller having a memory for storing a sequence program in which messages are programmed, a processor for performing sequence control by successively executing the sequence program stored in said memory, and a display unit for displaying a ladder diagram corresponding to the sequence program of said memory as well as the messages, a programmable controller alarm display method characterized in that when said processor senses an alarm during execution of the sequence program, the processor retrieves said sequence program on the basis of data defined in an alarm message portion present within said sequence program, and causes said display unit to display a ladder diagram that includes a ladder location concerning the alarm.
Claim 2
Dependent Claim 116 words
In a programmable controller having a memory for storing a sequence program in which messages are programmed, a processor for performing sequence control by successively executing the sequence program stored in said memory, and a display unit for displaying a ladder diagram corresponding to the sequence program of said memory as well as the messages, a programmable controller alarm display method characterized in that when said processor senses an alarm during execution of the sequence program, the processor retrieves said sequence program on the basis of data defined in an alarm message portion present within said sequence program, and causes said display unit to display a ladder diagram that includes a ladder location concerning the alarm.
Claim 3
Dependent Claim 47 words
A programmable controller alarm display method according to claim 1, wherein the processor is adapted to successively read instructions in the sequence program one at a time in accordance with a control program and sequentially process the instructions cyclically from a first instruction to a last instruction.
Claim 4
Dependent Claim 31 words
A programmable controller alarm display method according to claim 1, wherein functions of a magnetics circuit are stored, in the form of operation codes, in the sequence program at predetermined addresses.

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