12KM02E-V0002通道隔離卡件
警報的優(yōu)先級為1到5，其中1最高。報警按優(yōu)先級順序報告給操作員面板
首先，然后按發(fā)生順序。優(yōu)先級1導(dǎo)致電站條形圖和條件（如A1 HI）閃爍，并且需要確認才能停止閃爍。優(yōu)先級2還閃爍條形圖和條件，但停止閃爍
當警報清除時（即自清除）。優(yōu)先級3導(dǎo)致事件指示燈（L和S）和條件閃爍。只有在確認報警時，閃爍才會停止。優(yōu)先級4導(dǎo)致事件指示燈和條件閃爍，但警報清除后，閃爍停止。優(yōu)先級5顯示報警，但不要求確認。
報警限值以工程單位表示。還提供快速設(shè)置報警功能，允許設(shè)置報警限值在操作期間快速。設(shè)置以工程單位表示，但也將以范圍的%顯示在查看點時的設(shè)定點條形圖。報警按范圍指針參數(shù)的定義顯示。警報
可以設(shè)置為指針定義范圍的-10%到110%范圍內(nèi)的任何工程值。如果范圍改變，當前報警設(shè)置將在新范圍內(nèi)更改為相同的%。例如，如果HI報警為當前設(shè)置為100.0，范圍為0.0至100.0且范圍更改為300.0至400.0，HI報警將為移動到400.0。
在快速設(shè)置報警模式下，可以啟用或禁用每個報警。
該配置允許報警：在冷啟動時啟用或禁用。當報警被禁用時，它將不工作，但將保留以下設(shè)置：返回到啟用模式。與報警相關(guān)的完整操作員面板功能在章節(jié)中描述描述具體的面板設(shè)計。所有報警都具有以下功能：死區(qū)-要求信號低于或超過死區(qū)量的極限設(shè)置
在警報清除（變低）之前。報警死區(qū)設(shè)置為范圍指針刻度的固定百分比。
延遲時間-要求輸入保持高于（或低于）報警前延遲時間的限制設(shè)置跳閘（變高）。這有助于防止因工藝噪聲而跳閘的有害報警。延遲時間-要求輸入保持低于（或高于）極限設(shè)置加上延遲時間的死區(qū)在警報清除（變低）之前。這有助于防止由于工藝噪聲而導(dǎo)致的警報意外清除?；剽?當報警發(fā)生時，導(dǎo)致先前確認的報警需要確認（優(yōu)先級1-4）清除。
Alarms have priorities 1 to 5, with 1 the highest. Alarms are reported to the operator faceplate in order of priority first and then in order of occurrence. Priority 1 causes the station bargraphs and condition (e.g. A1 HI) to flash and requires acknowledgment to stop flashing. Priority 2 also flashes the bargraphs and condition but stops flashing when the alarm clears (i.e. Self Clearing). Priority 3 causes the event LEDs (L and S) and condition to flash. Flashing stops only when the alarm is acknowledged. Priority 4 causes the event LEDs and condition to flash but flashing stops when the alarm clears. Priority 5 displays the alarm but does not require that it be acknowledged. Alarm limits are in engineering units. A quickset ALARM feature is also available allowing alarm limits to be set quickly during operation. The settings are in engineering units but will also be displayed in % of range on the setpoint bargraph when viewing a point. Alarms are displayed as defined by the range pointer parameter. Alarms can be set to any engineering value within -10% to 110% of the range defined by the pointer. If a range is changed, the current alarm settings will be changed to be the same % within the new range. For example, if a HI alarm is currently set at 100.0 with a range of 0.0 to 100.0 and the range is changed to 300.0 to 400.0, the HI alarm will be moved to 400.0. Each alarm can be enabled or disabled when in the quickset ALARM mode. The configuration allows an alarm to be enabled or disabled on a cold start. When an alarm is disabled, it will not operate but will retain settings for return to the enabled mode. Complete operator faceplate functions, relating to alarms, are described in the sections describing the specific faceplate design. All alarms have the following features: Deadband - requires that the signal either drop below or exceed the limit setting by the amount of the deadband before the alarm clears (goes low). The alarm deadband is set as a fixed % of the range pointer scale. Delay-In Time - requires that the input remain above (or below) the limit setting for the delay time before the alarm trips (goes high). This can help prevent nuisance alarms that may be tripping due to process noise. Delay-Out Time - requires that the input remain below (or above) the limit setting plus deadband for the delay time before the alarm will clear (goes low). This can help prevent inadvertent clearing of alarms due to process noise. Ringback - causes a previously acknowledged alarm to require acknowledgment (priorities 1-4) when the alarm clears.
