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Our customer has a motor generator in a large room. The room temperature is
controlled by opening and closing ventilation louvers using a forward and
reverse motor. When the temperature rises above the setpoint, the louver
actuator motor operates for a programmed ON-time opening the louvers 10
degrees. After a programmed OFF-time, if the temperature is still above the
high setpoint, the louvers open in 10 degree
degree increments until the temperature falls below the high setpoint.
If the temperature in the room falls below the low setpoint, the louvers
progressively close keeping the room temperature within acceptable limits.
Note: The relays are programmed in the repeat mode (programmable
ON/OFF-time).
APPLICATION VARIATIONS
- Multi RTD for temperature alarms.
- Status inputs for control alarms.
- Motor run time.
- Data log generator START/STOP-time & other relevant data.
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