To provide a programmable controller for reflecting internal temperature rise to derating.
A programmable controller has an input circuit 2 to fetch input signals from an input device, an output circuit 3 to output output signals for driving an output device, a memory 4 storing a sequence program for executing a program, and a microprocessor 5, on the basis of the input signals input to the input circuit, to react the sequence program stored in the memory to control the output signals. The programmable controller is configured to acquire a rate of the number of parts being in an on-state to the total number of the parts of each circuit for each constant cycle and a mean value of the rate of the parts that are simultaneously in the on-state in a prescribed time period.
OGURO HIDEYUKI
SAKAGOSHI AKIHIRO
| JPH01234911A | 1989-09-20 | |||
| JPH01234911A | 1989-09-20 |
Takenaka Ikuo
Keigo Murakami
Kenji Yoshizawa