identified for each alarm during development will provide fast access with operators during operations. 

## Alarm sorting 

Sorting will be made in alarm screens according to one or more alarm lists without having any grouping limitation. (Ascending or descending). It will be able to make sorting by clicking over headers in alarm list. 

Tag, Name, Category, Field, Priority, Status, ON Time, OFF Time, Acknowledge Time 

Alarm Delay 

Time when alarm will remain active before notification to operator will be able to be adjusted. Time label which is present over alarm should be time when alarm is enabled rather than completion time of time delay. 

## Alarm record 

Different alarm recording method will be able to be specified for each alarm category. It will be able to be determined whether alarm is recorded When Alarm status changes as ON, OFF or acknowledged 

Alarms will be able to be recoded in printer, disk file or database together with text, time and date. Alarms will be printed or filed in format which can be changed by user. 

Operator interface software will provide opportunity for all users over network to record. Software will be able to direct printing operations to other printer when system is online. 

## 8.19.9 Trends 

## Gathering trendes 

Number of trends to be collected will not be limited by software. 

Trend information will be able to be recorded with sampling periods which can be configured between 1 millisecond and 24 hours by using software. Trend data will be able to be configured by number of file, size of file, sampling period, file location, priority and trend tag and will be recorded in circular file system together with field information. Length up to 255 characters will be supported for Name and path for stored files 

Historical data upto for last one years will be present in each file with 3 second sampling interval. Files will be joined for creating configurable historical data. Minimum 3 year data with 10 seconds sampling interval will be stored in historical data archive. 

Trend data will be retrieved transparently from historical data archive independent from archive file where data is located and from date of data which is received. Trends will be accessed online by operator research without requiting backup or reload historical data file. 

Trend data can be executed as periodically for example as sample for each sampling period or according to event for example retrieving in the event that certain condition is realized. Storage of trend data can be started or stopped with respect to several conditions such as status and time or manually by operator. 

Trend values will be stored by fluctuating point resolution and rescaling will not be required for retrieval or viewing. This will prevent deviation from accuracy also it will ensure labels to be configured according to new scaling intervals without compromising from integrity of storage pool. 

## Viewing trends 

