Title:
SEQUENCE CONTROL SYSTEM
Document Type and Number:
Japanese Patent JPS6431203
Kind Code:
A
Abstract:
PURPOSE:To execute scanning type control, sequential execution type control and continuous system control in parallel by properly time-dividing the processing of a single control device. CONSTITUTION:A program input device 107 edits an inputted program to a format to be executed by an arithmetic device 109, sends the edited program to a communication circuit 110 and transfers it to a program memory 112. A time division circuit 108 is constituted of the 1st and 2nd timers 121, 120 and an interruption controller 122, and programmably driven in accordance with a command from the device 109. Namely, the 1st timer 121 directly sends a signal to the controller 122 through a signal line 118 every period determined by the device 109 and the controller 122 directly transmits the signal to the device 109 as an interruption signal through a signal line 119. On the other hand, the 2nd timer 120 starts counting based on a command from the device 109 and informs the passage of a fixed time to the device 109. Consequently, scanning type control, sequential execution type control and continuous system control can be executed in parallel.
Inventors:
SHIKAYAMA MASAHIRO
NAGASE HIROSHI
SUGAI HIROSHI
NAGASE HIROSHI
SUGAI HIROSHI
Application Number:
JP18789887A
Publication Date:
February 01, 1989
Filing Date:
July 28, 1987
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05B19/05; G05B19/04; (IPC1-7): G05B19/04
Domestic Patent References:
| JPS5979311A | 1984-05-08 | |||
| JPS6048503A | 1985-03-16 | |||
| JPS616704A | 1986-01-13 | |||
| JPS61156307A | 1986-07-16 |
Attorney, Agent or Firm:
Tatsuyuki Unuma