## 8.22.5 Alarm Handling 

Any alarm shall be reported and indicated as follows: 

 On the mimic panel 

 By an acoustic signal 

 On the monitor on the screen pictures 

 By printing an alarm text on the monitor in a separate field of the monitor. The field shall be dedicated to alarm messages. 

 By printing an alarm text on the alarm printer 

 By sending an alarm text to the mobile telephone 

Alarms on the mimic shall be indicated by flashing the respective LED. The flashing shall continue until the alarm has been acknowledged, it shall then turn to fixed light if the alarm is on. When the alarm has been acknowledged and the alarm has stopped the light in the LED shall be turned off. 

It shall be possible to provide all alarms with an alarm priority. The indication of the alarm shall depend on the specific alarm priority. Up to 5 alarm priorities shall be provided. 

Alarms shall always be indicated on the mimic, in the field on the monitor, on the screen picture (if the picture is on-line) and printed on the monitor. 

The following information shall be stored in the alarm data base: 

 Year, month, day 

 Time for start of the alarm 

 Alarm priority 

 Description of component 

 Component no. 

 Alarm message (min. 25 characters) 

 Time for acknowledgement of the alarm 

 Time for stop of the alarm. 

It shall only be possible to acknowledge (reset) the alarm from the operators station. 

It shall be possible to acknowledge single alarms or all the alarms shown on the monitor. This applies for flow pictures as well as for alarm files. 

It shall be possible to suppress commuting alarms. It shall be clearly indicated if an alarm is suppressed. 

Alarm shall also be indicated on the process flow pictures and the picture for the individual component. 

It shall be possible for the system to handle up to 1000 alarms and alarm messages. 

It shall be possible for the operator to edit the alarm messages. 

