Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 8: Electrical Works  84 of 124  This will be configured as single common database where alarms can be acknowledged commonly  from any PC without requiring any program or software part. Operator Interface software will support use of event time label instead of its own time labels for  Alarm events where time is stamped by field control device for maintaining more accuracy. Operator  interface will support accuracy at milli second level for these time labels. Analog Alarms  Digital Alarms  An alarm can be configured for each analog tag where relevant limits can be identified for following  requirements.  Low-low, low, high, high-high, deviation lo, deviation hi, variation ratio  All analog alarm limits will be able to be adjusting without closing system. Changes will be recorded  to database automatically such that alarm adjustments will be correct when system is restarted. Use of deadzone values will be supported in analog alarms. Alarm can be assigned for each following condition over each digital tag.  Tag ON   Tag OFF  Alarm can be configured with respect to combination of more than one digital tag and each status  combination will be able to be configured as alarm output. Additionally if multiple digital alarm is  enabled in an alarm version, alarm will be generated if other status is switched. Alarm with two status  Tag 1 Status  Tag2 Status  OFF  OFF  OFF  ON  ON  OFF  ON  ON  Alarm with three status:  Tag 1 Status  Tag 2 Status  Tag3 Status  OFF  OFF  OFF  OFF  OFF  ON  OFF  ON  OFF  OFF  ON  ON  ON  OFF  OFF  ON  OFF  ON  ON  ON  OFF  ON  ON  ON  Alarm Viewing  All alarms and/or latest alarms can be viewed or acknowledged in any page together with proper  priorities.  There will be more than one alarm priority level or category within software. Priority of alarm can be  specified by color type of text in alarm message in screen. Color codes for alarm messages with  8_Vol3_d4.3_Section 8 electrical works_en_GIR.rev8.doc 