RELIANCE 57552-4控制器
報警功能塊可按每個回路一個使用
并包含與輸入P相關(guān)的四（4）個報警（正常情況下向控制器功能塊的過程輸入）。每個警報可以配置為無、高、低、HDEV、LDEV、DEV，和或。
偏差型報警將輸入P與輸入D進(jìn)行比較
偏差輸入，通常為回路設(shè)定點（即控制器功能塊），具有與輸入相同的范圍
P、 超出范圍（OR）報警比較過程輸入
使用范圍指針參數(shù)指定的范圍限制
（輸入R）。此參數(shù)必須指向以下功能塊：包括MINSCALE和MAXSCALE配置
適當(dāng)縮放的參數(shù)（如模擬輸入）。如果沒有配置后，0.0-100.0將用作默認(rèn)范圍。
報警的優(yōu)先級為1到5，其中1為最高，并且按優(yōu)先順序報告給操作員面板，并且然后按發(fā)生順序。優(yōu)先級1導(dǎo)致站點
條形圖和條件（如A1、HI）閃爍，并要求
確認(rèn)停止閃爍。優(yōu)先級2還閃爍
條形圖和條件，但報警時停止閃爍清除（即自清除）。優(yōu)先級3導(dǎo)致事件指示燈（L和S）和閃光條件。只有當(dāng)確認(rèn)報警。優(yōu)先級4也會導(dǎo)致事件指示燈并且條件閃爍，但在警報清除時停止。優(yōu)先級5顯示報警，但不要求報警承認(rèn)。
報警限值以工程單位表示?？焖倬瘓?br/>
該功能還可用于快速設(shè)置報警限值
在操作期間。設(shè)置單位為工程單位，但將：還應(yīng)在條形圖上以范圍的%顯示。報警按范圍指針參數(shù)的定義顯示。報警可以設(shè)置為指針定義范圍的-10%至110%范圍內(nèi)的任何工程值。如果范圍為更改后，當(dāng)前報警設(shè)置將在新范圍內(nèi)更改為相同的%。例如，如果HI報警當(dāng)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(dāng)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。
ALARM function blocks can be used on a one per loop basis and contain four (4) alarms associated with Input P (normally the process input to the controller function block). Each alarm can be configured as NONE, HI, LO, HDEV, LDEV, DEV, and OR. Deviation type alarms compare Input P with Input D, the deviation input, normally the loop setpoint (i.e. the setpoint to the controller function block), having the same range as Input P. An Out of Range (OR) alarm compares the process input with the range limits specified by the range pointer parameter (input R). This parameter must point to a function block that includes MINSCALE and MAXSCALE configuration parameters (e.g. Analog Input) for proper scaling. If not configured, 0.0-100.0 will be used as a default range. Alarms have priorities 1 to 5, with 1 the highest and 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 also causes the event LEDs and condition to flash but 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 bargraph. 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.
