Programming specific applications
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Applications Guide All rights reserved
20
You can add logic to a control program to generate an alarm for the following conditions:
• A sensor has stopped communicating
• A sensor is not sending a valid value
Alarming for loss of communications
1 Tie the Sensor Binder microblock's
output to an Alarm microblock. The
output will be true when
any sensor is in alarm.
2 Add a
Delay On Make microblock to prevent nuisance alarms during startup or power failure.
Alarming for sensed values
1 To detect if a sensor's value is no longer valid, do the following:
2 Assign only one sensor to an ASVI or BSVI microblock.
3 Tie the
output to a not microblock since the valid output will be false when in alarm.
4 Attach an
Alarm microblock to notify the user if the sensor in the ASVI or BSVI microblock has gone into error.
5 Add a Delay On Make microblock to prevent nuisance alarms during startup or power failure.
See the Microblock Reference for details of each microblock's alarming conditions.
Programming specific applications
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