Title:
PLC program management device
Document Type and Number:
Japanese Patent JP6023266
Kind Code:
B2
Abstract:
An execution code of a user program applicable to a PLC is fitted and arranged to an adequate block among memory blocks of variable sizes, and execution order and position information of each execution code are downloaded to the PLC along with recorded execution table. A CPU module of PLC sequentially executes each execution code randomly arranged on a memory with reference to the execution table. Because an execution code is loaded on a memory block having respectively different sizes such as N, 2N and 4N, utilization of non-use space can be improved over a conventional allocation method of fixed size. An execution table is utilized to discontinuously configure a program execution area, whereby a user program can be easily modified or added during PLC operation.
Inventors:
Lisa Hung
Application Number:
JP2015101999A
Publication Date:
November 09, 2016
Filing Date:
May 19, 2015
Export Citation:
Assignee:
LSIS CO.,LTD.
International Classes:
G05B19/05
Domestic Patent References:
| JP61118806A | ||||
| JP2003122410A | ||||
| JP2002333903A |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura
Jun Tsuruta
Tomohiro Minamiyama
Akira Kawai
Kenichi Nakamura