External Override of the Operation Mode

Add a datapoint “Ext_ManSwCond” as an analog value, which will be overridden by an external BACnet device.

Assuming that the datapoint “Ext_ManSwCond” and “MansSwCond have the values : 0 = night; 1 = day and 3 = auto, the external override will have priority whenever it has one of the values “1” or “2” . When “Ext_ManSwCond” has a value of EQL statement = 0 and the local “ManSwCond” will be connected to the manual override input.

Fig. 19.   Connect an external override from a BACnet device