Normally, the status of the PV reflects the measurement value, the operating condition of the I/O card, and any active alarm condition.
In Auto mode, OUT reflects the value and status quality of the PV. However, if the PV status is Good but the PV value is more than -10% to 110% outside the span defined by PV_SCALE, then the OUT status is changed to Uncertain. In Man mode, the OUT status high and low limits are set to indicate that the value is a constant and the OUT status is always Good.