12KM02E-V0002通道隔离卡件
警报的优先级为1到5，其中1最高。报警按优先级顺序报告给操作员面板
首先，然后按发生顺序。优先级1导致电站条形图和条件（如A1 HI）闪烁，并且需要确认才能停止闪烁。优先级2还闪烁条形图和条件，但停止闪烁
当警报清除时（即自清除）。优先级3导致事件指示灯（L和S）和条件闪烁。只有在确认报警时，闪烁才会停止。优先级4导致事件指示灯和条件闪烁，但警报清除后，闪烁停止。优先级5显示报警，但不要求确认。
报警限值以工程单位表示。还提供快速设置报警功能，允许设置报警限值在操作期间快速。设置以工程单位表示，但也将以范围的%显示在查看点时的设定点条形图。报警按范围指针参数的定义显示。警报
可以设置为指针定义范围的-10%到110%范围内的任何工程值。如果范围改变，当前报警设置将在新范围内更改为相同的%。例如，如果HI报警为当前设置为100.0，范围为0.0至100.0且范围更改为300.0至400.0，HI报警将为移动到400.0。
在快速设置报警模式下，可以启用或禁用每个报警。
该配置允许报警：在冷启动时启用或禁用。当报警被禁用时，它将不工作，但将保留以下设置：返回到启用模式。与报警相关的完整操作员面板功能在章节中描述描述具体的面板设计。所有报警都具有以下功能：死区-要求信号低于或超过死区量的极限设置
在警报清除（变低）之前。报警死区设置为范围指针刻度的固定百分比。
延迟时间-要求输入保持高于（或低于）报警前延迟时间的限制设置跳闸（变高）。这有助于防止因工艺噪声而跳闸的有害报警。延迟时间-要求输入保持低于（或高于）极限设置加上延迟时间的死区在警报清除（变低）之前。这有助于防止由于工艺噪声而导致的警报意外清除。回铃-当报警发生时，导致先前确认的报警需要确认（优先级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.
