Using Logical Operators

Command

Result = (PV12 = 10 AND PV13 = 2);

Comment

If PV12 equals 10 and PV13 equals 2 then Result is TRUE(1)

Expression

Motor_1 AND Motor_2;

Comment

If both Motor_1 and Motor_2 are TRUE, that is Digital bits are 1 or ON, then the expression is TRUE

Expression

PV12 = 1 OR PV13 > 2 OR Counter <> 0;

Comment

If either PV12 equals 1 or PV13 is greater than 2 or Counter is not equal to 0, then the expression is TRUE

Command

Result = (Motor1_Ol OR Motor2_Ol);

Comment

If either Motor1_Ol or Motor2_Ol is TRUE, that is Digital bit is 1 or ON, then Result is TRUE (1)

Command

IF NOT PV12 = 10 THEN ...

Comment

If PV12 does not equal 10 then the result is TRUE. This is functionally identical to IF PV12 <> 10 THEN . . .

Expression

NOT Tag_1;

Comment

This expression is TRUE if Tag_1 = 0. This is commonly used for testing digital variables