Title:
PROGRAM DECENTRALIZED SERIAL EXECUTION TYPE PROGRAMMABLE-LOGIC-CONTROLLER SYSTEM
Document Type and Number:
Japanese Patent JPS588305
Kind Code:
A
Abstract:
PURPOSE:To surely prevent the generation of racing, by constituting in such a manner that a device set to a final device number tansfers output data to all other devices ahead the refreshing. CONSTITUTION:When the execution of a user's program is finished at the #1 device, the #2 device receives the input and output data transferred from the #1 device and writes the data in an input and output memory 6. After this is finished, the #2 device executes the user's program based on the contents of the received data. When this execution is finished, the rewritten input and output data is transferred to the #3 device. Each device executes the auxiliary operation by using a vacant time. When the exeuction of the user's program is finished in the #1-#3 devices, the input and output data rewritten with the execution of the user's program is sequentially transferred to the #1 and #2 devices. In the #1 and #2 devices, the contents of the area corresponding to the memory 6 are rewritten with the transferred data.
Inventors:
MATSUURA TOSHIMI
Application Number:
JP10600981A
Publication Date:
January 18, 1983
Filing Date:
July 07, 1981
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO
International Classes:
G06F9/38; G05B19/05; G06F15/16; G06F15/173; G06F15/177; G06F15/80; (IPC1-7): G05B19/02; G06F9/38; G06F15/16
Attorney, Agent or Firm:
Shigenori Wada