Title:
PROGRAMMABLE LOGIC CONTROLLER
Document Type and Number:
Japanese Patent JP3659398
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a programmable logic controller which makes it possible to replace the whole user program during operation.
SOLUTION: The programmable logic controller PLC1 is composed principally of a CPU 101, various memories 102, 103 and 104, etc., has a memory card 110 which is previously stored with a replacing user program through an interface I/F 109, and is equipped with an all-program replacement means which replaces the whole current user program with a user program stored in the replacing program storage means and a one-cycle on-flag forcible operating means which forcibly sets a one-cycle on flag ON prior to the starting one-round execution of the user program after the replacement after the user program is all replaced by the program all-replacement means.
Inventors:
Akio Ono
Application Number:
JP30169799A
Publication Date:
June 15, 2005
Filing Date:
October 22, 1999
Export Citation:
Assignee:
OMRON Corporation
International Classes:
G05B19/05; G05B19/02; (IPC1-7): G05B19/05; G05B19/02
Domestic Patent References:
| JP9120306A | ||||
| JP10124119A | ||||
| JP4209007A |
Attorney, Agent or Firm:
Shinichi Iizuka