Ack to OFF Dig.Out using PV450 Fn.key on all alarm separately

Hello Team,

Please find the attached PV450 configuration in PV2.9 version software.

This configuration of PV450 is programmed for the Acknowledge the Buzzer, by pressing the one of Function Key, after every new alarm arrive.

Sequence required is as follows:
1. Alarm01 came, Buzzer is to get ON, through Digital Output of PV450.
2. Then doing Acknowledge by pressing the Fn.Key, Dig.Output should get OFF, which will OFF the Buzzer
3. IF Alarm01 is still active and after Acknowledging, Alarm02 is coming then Buzzer should get ON again.
4. And through same way of Step.no.2 to follow for acknowledge of second alarm.

This above is what the requirement is but unable to achieve through the attached configuration file, as what I am getting is inconsistent with the program.
and Output found to be flickering sometimes.

-regards
Rahul J. G