Program timer

Abstract

Abstract PURPOSE:To detect early a fault by making use of a learning function and at the same time to ensure an accurate judgment to different states for each function, by providing a means to compare the physical quantity generated from a sequence control with the measured value obtained in a normal state. CONSTITUTION:A means is provided to compare the physical quantity generated from a sequence control with the measured value obtained in a normal mode. For instance, a learning function program is started by a switch group 21, and the sampling interval is calculated by a microprocessor CPU18. The temperature, pressure, etc. are stored in a memory 19 via a reading signal processors 132- 152, a multiplexer 16 and an A/D converter 17 while a device 2 to be controlled is controlled in sequence. Then the allowance value is set by the group 21 for each temperature and pressure, and the CPU18 measures the temperature and pressure of the device 2 and compares them with the value measured by the learning function. Then an alarm signal is transmitted via an output port 24 if the temperature and pressure of the device 2 are out of the allowance value respectively.

Inventors

• 👤 Hideyo Iketani
• 👤 池谷　英世

Bibliographic Details