SA9602F/SA9602J

sames

7/14

The diagram below shows the behavior of the direction indication, DIR, when energy

reversal takes place. The timing period for the DIR signal to change state, t

be defined by the time it takes for the integrater to count down from its value at the

time of energy reversal. This is determined by the energy consumption rate.

The square wave signal on FMO indicates the polarity of the mains voltage.

Due to comparator offsets, the FMO low to high transition can occur within a range

as shown above. The time between succesive low to high transitions will be equal

to the mains voltage period.

D R -01 284

FMO

MA I N S

t

V

t

t

D IR

D R - 01 283

V

I

DI R

t

t

t

t