HIMA F3113a工業(yè)自動化卡件
默認設置已禁用。與變化率采樣率參數一起使用。負變化率限制（工程單位）0.0每秒工程單位的變化率，將觸發(fā)負變化率警報。默認設置已禁用。與變化率采樣率參數一起使用。變化率采樣率0.0比較之間等待的時間從0到300秒。默認值0.0是在每次輸入采樣后進行檢查。9.11.1.1變化率警報：ALG608&ALG616模塊IC695ALG608和IC695ALL616可檢測每秒工程單位的負變化率和正變化率。當任何一個變化率參數配置為非零時，模塊將采用先前變化率樣本和當前樣本之間的工程單位差，然后除以樣本之間的經過時間。如果工程單位從上一個樣本到當前樣本的變化為負值，則模塊將比率變化與負值變化率參數進行比較。如果樣本之間的工程單位變化為正，則模塊將比較變化率與正變化率參數值的結果。在任何一種情況下，如果變化率大于配置的變化率，則會發(fā)生變化率警報。模塊在報警后采取的行動取決于已在“診斷報告啟用”、“故障報告啟用”和“中斷啟用”參數中設置的已啟用變化率行動。變化率采樣率參數確定模塊比較變化率的頻率。如果變化率采樣率為0或小于信道更新率的任何時間段，模塊將比較信道的每個輸入樣本的變化率。PACSystems*RX3i系統(tǒng)手冊第10節(jié)GFK-2314T 2019年9月模擬輸入模塊418信道參數（續(xù)）參數默認說明高-高報警（英制單位）高-高、高、低和低-低參數的默認值取決于配置的量程類型和量程。每個范圍和范圍類型都有一組不同的默認值。報警和死區(qū)所有報警參數均在工程單位中指定。要使用報警，A/D報警模式也必須配置為啟用。高-高報警和低-低報警：當達到或通過配置值時，將觸發(fā)低-低警報或高-高警報。配置值必須低于/高于相應的低/高報警限值。高報警和低報警：當達到或低于（高于）配置值時，將觸發(fā)低（高）報警。高報警死區(qū)和低報警死區(qū)：工程單位中高于報警條件（低死區(qū)）或低于報警條件（高死區(qū)）的范圍，即使報警條件消失，報警狀態(tài)位也可以保持設置。要清除報警狀態(tài)，通道輸入必須超出死區(qū)范圍。報警死區(qū)不應導致報警清除條件超出工程單位用戶限制范圍。例如，如果通道的工程單位范圍為-1000.0至+1000.0，且高報警設置為+100.00，則高報警死區(qū)值范圍為0.0至小于1100.0。1100.0或更大的死區(qū)將使高報警清除條件低于–1000.0單位，從而使報警無法在
Default is disabled. Used with Rate of Change Sampling Rate parameter. Negative Rate of Change Limit (Eng Units) 0.0 Rate of change in Engineering Units per Second that will trigger a Negative Rate of Change alarm. Default is disabled. Used with Rate of Change Sampling Rate parameter. Rate of Change Sampling Rate 0.0 Time from 0 to 300 seconds to wait between comparisons. Default of 0.0 is to check after every input sample. 9.11.1.1 Rate of Change Alarms: ALG608 & ALG616 Modules IC695ALG608 and IC695ALG616 can detect both Negative Rate of Change and Positive Rate of Change in Engineering Units per Second. When either of the Rate of Change parameters is configured to be non-zero, the module takes the difference in Engineering Units between the previous rate of change sample and the current sample, then divides by the elapsed time between samples. If the Engineering Unit change from the previous sample to current sample is negative, the module compares the rate change with the Negative Rate of Change parameter. If the Engineering Unit change between samples is positive, the module compares the results in comparing the rate change with the Positive Rate of Change parameter value. In either case, if the rate of change is greater than the configured rate, a rate of change alarm occurs. The actions taken by the module following the alarm depend on the enabled rate of change actions that have been set up in the "Diagnostic Reporting Enable", "Fault Reporting Enable", and "Interrupts Enabled" parameters. The Rate of Change Sampling Rate parameter determines how frequently the module compares the Rate of Change. If the Rate of Change Sampling Rate is 0 or any time period less than the channel update rate, the module compares the Rate of Change for every input sample of the channel. PACSystems* RX3i System Manual Section 10 GFK-2314T Sept. 2019 Analog Input Modules 418 Channel Parameters (Continued) Parameter Default Description High-High Alarm (Eng Units) The defaults for the High-High, High, Low, and Low-Low parameters depend on the configured Range Type and Range. Each Range and Range Type has a different set of default values. Alarms and Deadbands All of the alarm parameters are specified in Engineering Units. To use alarming, the A/D Alarm Mode must also be configured as enabled. High-High Alarm and Low-Low Alarm: When the configured value is reached or passed, a Low-Low Alarm or High-High Alarm is triggered. The configured values must be lower than/higher than the corresponding low/high alarm limits. High Alarm and Low Alarm: When the configured value is reached or below (above), a Low (High) Alarm is triggered. High and Low Alarm Deadbands: A range in Engineering Units above the alarm condition (low deadband) or below the alarm condition (high deadband) where the alarm status bit can remain set even after the alarm condition goes away. For the alarm status to clear, the channel input must fall outside the deadband range. Alarm Deadbands should not cause the alarm clear condition to be outside the Engineering Unit User Limits range. For example, if the engineering unit range for a channel is -1000.0 to +1000.0 and a High Alarm is set at +100.0, the High Alarm Deadband value range is 0.0 to less than 1100.0. A deadband of 1100.0 or more would put the High Alarm clear condition below –1000.0 units making the alarm impossible to clear within the
