ABNORMAL COMMUNICATION STATE SENSING DEVICE FOR COMBUSTION EQUIPMENT

Title:

ABNORMAL COMMUNICATION STATE SENSING DEVICE FOR COMBUSTION EQUIPMENT

Document Type and Number:

Japanese Patent JP3487943

Kind Code:

B2

Abstract:

PURPOSE: To facilitate judgement of normal or abnormal state in a remote controlled communication of a combustion equipment.
CONSTITUTION: Combustion equipment is provided with a communication part 28 for performing a remote controlled communication. A communication state is sensed by a monitor at a communication state sensing part 32. When it is a normal communication state, a normal data is written into a sensing memory part 33 and in turn when it is an abnormal communication, an abnormal data is written into a sensing memory part 33. A data reading-out part 30 reads out data stored in the sensing memory part 33 for every predetermined sampling time and when the normal data is applied, it may output an increment signal and in turn when the abnormal data is applied, it may output a decrement signal. An adding or subtracting counter 34 has an upper limit value and a lower limit value, wherein 1 is added within the range in response to the increment signal and 1 is subtracted in response to the decrement signal. A D/A data conversion part 35 converts the counted values in the adding or subtracting counter 34 into an analogue voltage within a range of an upper limit voltage corresponding to the upper limit value and a lower limit voltage corresponding to a lower limit value and then outputs them to a D/A port 36. A voltage at the D/A port 36 is detected by a tester and the like so as to perform a judgement of normal or abnormal communication state.

Inventors:

Hisayuki Watanabe
Takashi Kaneko
Takehisa Mashima
Naoki Obayashi

Application Number:

JP3607695A

Publication Date:

January 19, 2004

Filing Date:

January 31, 1995

Export Citation:

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