PURPOSE: To enable the inspection of the alarm transmittisng function automatically, by delivering the alarm signal for a given time and receiving the both signals with alarm release signal, at the start time of business.
CONSTITUTION: When the business start time for tenants closes, the switch S is selected to R3. With this operation, the voltage VB is fed to the signal delivery circuit 1, and the circuit 1 delivers OFF signal. Simultaneously, the time limit circuit 4 is started, and the virtual signal generation relay 5 is operated for a given time with the delay time when the OFF signal can completely be delivered. With this operation, the contact S2 is open for a given time, and the signal equivalent that the detector detects failure is fed to the AND circuit 3 with the contact S1 open, and the circuit 1 delivers alarm signal. After the both signals are completely delivered, the circuit 4 resets FF2. Further, at the alarm center, the alarm signal received after the OFF signal is confirmed to confirm the normality of the function of alarm signal delivery.
SUEYASU YASUNOBU
KASHIWAZAKI YOSHINORI
AOYAMA HITOSHI
SOGO KEIBI HOSHO KK