The smallest possible reading as a signed integer. The value of this OID variable should be scaled by transferSwitchSensorDecimalDigits. For example, if the value is 1 and transferSwitchSensorDecimalDigits is 2, then actual value is 0.01. This value determines whether to use the signed or unsigned threshold and value columns: If the minimum is below zero the sensor can have negative readings and the signed columns should be used. This parameter does not apply to sensors without numerical reading, e.g. operational state or switch fault sensors.