bit,alarm_type,priority,tag_id,alarm_text,description
0,HIGH_LEVEL,2,AID.WRPS.STN.HIGH_LEVEL,Wet well high level,"Wet well level above the high level alarm setpoint (%MW8, default 5200 mm = 86.7%). The discrete item AID.WRPS.STN.HIGH_LEVEL mirrors this bit; the two are cross-checked at fixture load."
1,HIGH_HIGH_LEVEL,1,LSHH-102,Wet well high high level,"LSHH-102 wet at 5500 mm (91.7%). Forces all available pumps to 50 Hz and bypasses min-off timers. The switch itself is a field input and is not historised - this bit is the only record of it."
2,LOW_LOW_LEVEL,1,LSLL-103,Dry run lockout,"LSLL-103 dry. Stops all pumps and latches the dry-run lockout, which needs a manual reset. Field input, not historised - this bit is the only record."
3,SPILL,1,AID.WRPS.STN.SPILL_ACTIVE,Spill over the weir,"Level over the 6000 mm weir crest. An environmental reportable event - report the count plainly and never round it. The discrete item AID.WRPS.STN.SPILL_ACTIVE mirrors this bit."
4,PUMP_TRIP,1,AID.WRPS.PU301.TRIPPED,PU-301 tripped,"PU-301 tripped on thermal TE-312, vibration above 11.0 mm/s, or no-flow on PIT-311. Trips LATCH and clear only on the reset command."
5,PUMP_TRIP,1,AID.WRPS.PU302.TRIPPED,PU-302 tripped,"PU-302 tripped on thermal TE-322, vibration above 11.0 mm/s, or no-flow on PIT-321. Trips LATCH and clear only on the reset command."
6,PUMP_TRIP,1,AID.WRPS.PU303.TRIPPED,PU-303 tripped,"PU-303 tripped on thermal TE-332, vibration above 11.0 mm/s, or no-flow on PIT-331. Trips LATCH and clear only on the reset command."
7,SEAL_LEAK,3,MSE-313,PU-301 seal leak,"MSE-313 moisture detected. Alarm only - a seal leak does NOT remove availability (WRPS-PRO-001 section 5.5) and the pump keeps running."
8,SEAL_LEAK,3,MSE-323,PU-302 seal leak,"MSE-323 moisture detected. Alarm only; availability is unaffected."
9,SEAL_LEAK,3,MSE-333,PU-303 seal leak,"MSE-333 moisture detected. Alarm only; availability is unaffected."
10,HIGH_VIBRATION,2,VE-314,PU-301 high vibration,"VE-314 above the 7.1 mm/s alarm threshold. Above 11.0 mm/s the unit trips and bit4 sets as well. There is no vibration trend in the historian - the instrument is a field input."
11,HIGH_VIBRATION,2,VE-324,PU-302 high vibration,"VE-324 above the 7.1 mm/s alarm threshold. Above 11.0 mm/s the unit trips and bit5 sets as well."
12,HIGH_VIBRATION,2,VE-334,PU-303 high vibration,"VE-334 above the 7.1 mm/s alarm threshold. Above 11.0 mm/s the unit trips and bit6 sets as well."
13,LEVEL_SIGNAL_FAULT,1,LIT-101,Wet well level signal fault,"LIT-101 frozen or out of range - no change greater than 1 mm for 10 minutes with a pump running. Priority 1: losing the level signal on a well that can spill is a priority 1 condition. While this is active, AID.WRPS.STN.LEVEL is not trustworthy and any level answer over the window must say so."
14,MAINS_FAILURE,1,XA-502,Mains supply failure,"XA-502 unhealthy. Station is on loss of supply."
15,SETPOINT_REJECTED,3,AID.WRPS.STN.ALARM_WORD,Setpoint write rejected,"A SCADA setpoint write was rejected by the PLC as out of range and the previous value was retained. There is no dedicated instrument for this condition - the bitmask is the only record of it, so the tag is the bitmask itself."