Title:
TIMER CIRCUIT FOR PROGRAMMABLE CONTROLLER
Document Type and Number:
Japanese Patent JPS6441006
Kind Code:
A
Abstract:
PURPOSE:To reduce a time error caused by the setting step position of a timer by using a clock input control means which supplies the clock signal received from a clock generator to a timer arithmetic means. CONSTITUTION:A clock input control means 7 is set between a clock generator 5 and a timer arithmetic means 6. Then the means 7 conducts by a command given from a CPU 1 synchronously with the drive (ON) of a timer set on a program. Thus the clock signals received from the generator 5 are supplied to a timer arithmetic means 6 for start of a counting job and the count value of a timer is calculated. As a result, the count value of the timer is approximately equal to the actual elapsed time and a highly accurate timer is obtained.
Inventors:
KASAI YOSHIO
GOMI AKIRA
GOMI AKIRA
Application Number:
JP19701387A
Publication Date:
February 13, 1989
Filing Date:
August 06, 1987
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G05B19/05; G05B19/04; (IPC1-7): G05B19/04
Domestic Patent References:
| JPS60250446A | 1985-12-11 |
Attorney, Agent or Firm:
Mamoru Takada (1 person outside)