Plc analog input channel and its application in the data collection and process field 模擬量輸入通道及其在數(shù)據(jù)采集處理中的應用
In analog input channel , the combination software filter is applied to obtain more credible data as possible , and median voting circuit module is adopted in output channel to gain accurate outputs 在模擬輸入通道中采用中位值濾波和遞推平均濾波的組合算法,來獲取盡可能可靠的輸入數(shù)據(jù),在模擬輸出通道中則采用中值表決電路通用模塊實現(xiàn)正確的模擬輸出。
Thirdly , the range switch circuit and filter circuit are designed in the analog input channel . to realize the safe high speed acquisition , the interface circuits are separated from the function circuits , and the isolation power with high performance and digital isolator is used to restrain the common mode disturb and noise of the input 3 .模擬輸入通道設(shè)計有量程切換電路和濾波電路,并且采用了屏蔽、浮置技術(shù)和磁耦隔離技術(shù),使用了高性能的隔離電源和磁電耦合器,有效地抑制了輸入信號的共模干擾和噪聲,實現(xiàn)了安全、高速的數(shù)據(jù)采集。