Undervoltage Thresholds

Field	Description
Default value	Dropout: 85% of the rated voltage. Pickup: 90% of the rated voltage.
Range	Range for falling voltage (dropout) is 70%-95% of the rated voltage. Range for return voltage (pickup) is 85%–100% of the rated voltage.
Adjustable	The adjustable step for an undervoltage threshold is 1%.
Differential	The differential between dropout and pickup is equal to 2% of rated voltage.
On LCD display	If minimum 2% differential of rated voltage rule is broken during dropout setting, the pickup value will be modified dynamically (pickup = dropout + 2%) to keep the rule.
On Modbus	Modbus register write: The dropout value is always accepted. The pickup value will be modified to a value (pickup = dropout + 2%) when the pickup value does not comply the minimum differential.
Sequence of events	When a sensor detects a voltage below the dropout set voltage for a period longer than the time delay, it will deem the voltage for out of range. When a sensor detects a voltage at or above the pickup point, it will deem the voltage as acceptable.