HIMA F3237 Z7108 工控模塊系統(tǒng)備件
=6.000低量程值（A/D單位）=1.000對于本例，1.0V至6.0V為正常電壓范圍，但模塊將嘗試為超出范圍的電壓縮放輸入。如果向通道輸入10.0V的電壓，模塊將返回36.000的縮放通道值。對于超出可接受范圍或無效的縮放輸入，應(yīng)用程序應(yīng)使用警報(bào)或其他預(yù)防措施。圖277：輸入縮放ALG232電壓（A/D單位）1.000 6.000 0.000 20.000英尺/秒（工程單位）PACSystems*RX3i系統(tǒng)手冊第10節(jié)GFK-2314T 2019年9月模擬輸入模塊392 9.8.1.1變化率警報(bào)：ALG232 ALG232每秒可以檢測工程單位的負(fù)變化率和正變化率。當(dāng)任何一個(gè)“變化率”參數(shù)配置為非零時(shí)，模塊將取上一個(gè)樣本和當(dāng)前樣本之間的工程單位差，然后除以樣本之間的經(jīng)過時(shí)間。如果工程單位從上一個(gè)樣本到當(dāng)前樣本的變化為負(fù)值，則模塊將比率變化與負(fù)值變化率參數(shù)進(jìn)行比較。如果樣本之間的工程單位變化為正值，則模塊將比率變化與正值變化率參數(shù)值進(jìn)行比較。在任何一種情況下，如果變化率大于配置的變化率，則會(huì)發(fā)生變化率警報(bào)。模塊在報(bào)警后采取的行動(dòng)取決于已在診斷報(bào)告啟用和故障報(bào)告啟用參數(shù)中設(shè)置的已啟用變化率行動(dòng)。變化率采樣率參數(shù)確定模塊比較變化率的頻率?？捎糜诖藚?shù)的最小值為60ms，即，模塊可在每60ms后比較變化率。當(dāng)CPU轉(zhuǎn)換到RUN模式或模塊現(xiàn)場電源循環(huán)時(shí)，ALG232在啟動(dòng)變化率檢測前等待100ms。這是為了忽略輸入信號中的任何毛刺。9.8.1.1.1使用報(bào)警-診斷報(bào)告啟用和故障報(bào)告啟用配置參數(shù)可用于為單個(gè)通道報(bào)警啟用不同類型的響應(yīng)。默認(rèn)情況下，在每個(gè)通道上禁用所有響應(yīng)?？梢詾槊總€(gè)通道啟用任何報(bào)警組合。? 如果啟用了診斷報(bào)告，模塊將在該通道的診斷參考地址的參考存儲器中報(bào)告通道報(bào)警。? 如果啟用了故障報(bào)告，則模塊會(huì)在I/O故障表中記錄每次通道報(bào)警的故障日志。PAC系統(tǒng)*
= 6.000 Low Scale Value (A/D Units) = 1.000 For this example, 1.0V to 6.0V is the normal voltage range, but the module will attempt to scale the inputs for a voltage that lies outside the range. If a voltage of 10.0V were input to the channel, the module would return a scaled channel value of 36.000. The application should use alarms or other precautions for scaled inputs that are outside the acceptable range or otherwise invalid. Figure 277: Input Scaling ALG232 Voltage (A/D Units) 1.000 6.000 0.000 20.000 Feet/Second (Engineering Units) PACSystems* RX3i System Manual Section 10 GFK-2314T Sept. 2019 Analog Input Modules 392 9.8.1.1 Rate of Change Alarms: ALG232 ALG232 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 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 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 and Fault Reporting Enable parameters. The Rate of Change Sampling Rate parameter determines how frequently the module compares the Rate of Change. The minimum value which can be used with this parameter is 60 ms, i.e., the module can compare the rate of change after every 60 ms. When the CPU transitions to RUN mode or the module field power is cycled, the ALG232 waits 100ms before starting Rate of Change detection. This is to ignore any glitches in the input signal. 9.8.1.1.1 Using Alarming The Diagnostic Reporting Enable and Fault Reporting Enable configuration parameters can be used to enable different types of responses for individual channel alarms. By default, all responses are disabled on every channel. Any combination of alarms can be enabled for each channel. ? If Diagnostic Reporting is enabled, the module reports channel alarms in reference memory at the Diagnostic Reference address for that channel. ? If Fault Reporting is enabled, the module logs a fault log in the I/O Fault table for each occurrence of a channel alarm. PACSystems*
