Unitary

Pre-APOGEE

APOGEE

BACnet

PXC.A

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Syntax

If (cond1.NAND.cond2) then...

cond1,cond2

Defines a condition that is the result of a comparison between two values.

Use

  • Used to compare two logical conditions.
  • If both conditions are true, then the result of the .NAND. statement is false.
  • A single statement can incorporate a combined total of 16 relational and logical operators.

Example

00 IF (LDO1.EQ.ON.NAND.LDO2.EQ.ON) THEN ON(LDO3) ELSE OFF(LDO3)

LDO1 State

LDO2 State

LDO3 State

NAND Result

OFF

OFF

ON

TRUE

OFF

ON

ON

TRUE

ON

OFF

ON

TRUE

ON

ON

OFF

FALSE

Notes

For APOGEE Firmware Revision 2.3 and earlier, AND statements should be used instead of NAND. In this case, the above example would be written as:

100  IF (LDO1.EQ.ON.AND.LDO2.EQ.ON) THEN OFF(LDO3) ELSE ON(LDO3)