MOOG M128-010-A001B伺服模塊,M128-010-A001B使用手冊(cè)
DCS是一個(gè)由過程控制級(jí)和過程監(jiān)控級(jí)組成的以通信網(wǎng)絡(luò)為紐帶的多級(jí)計(jì)算機(jī)系統(tǒng),綜合了計(jì)算機(jī)(Computer)、通訊(Communication)、顯示(CRT)和控制(Control)等技術(shù),具有分散控制、集中操作、分級(jí)管理、配置靈活、組態(tài)方便的特點(diǎn)。
DCS控制系統(tǒng)中的I/OM128-010-A001B伺服模塊
控制系統(tǒng)需要建立信號(hào)的輸入和輸出通道,這就是I/O。DCS中的I/O一般是模塊化的,一個(gè)I/O模塊上有一個(gè)或多個(gè)I/O通道,用來連接傳感器和執(zhí)行器(調(diào)節(jié)閥)。
DCS的控制單元:一個(gè)過程控制站是有幾個(gè)機(jī)架組成,每個(gè)機(jī)架可以擺放一定數(shù)量的模塊。CPU所在的機(jī)架被稱為CPU單元,同一個(gè)過程站中只能有一個(gè)CPU單元,其他只用來擺放I/O模塊的機(jī)架就是I/O單元。I/O單元與CPU是通過現(xiàn)場(chǎng)總線連接的。
常用的I/O信號(hào)一般分為:AI--模擬量輸入信號(hào);AO--模擬量輸出信號(hào);DI--數(shù)字量輸入信號(hào);DO--數(shù)字量輸出信號(hào)。
# DCS系統(tǒng)的選型設(shè)計(jì)調(diào)試
1、系統(tǒng)和控制器的配置
系統(tǒng)和控制器的配置要重點(diǎn)考慮可靠性和負(fù)荷率(包括冗余度)指標(biāo)。通訊負(fù)荷率必須控制在合理范圍內(nèi),控制器的負(fù)荷率盡可能均衡,避免“高負(fù)荷”問題的發(fā)生。
2、系統(tǒng)控制邏輯分配MOOG M128-010-A001B伺服模塊
系統(tǒng)控制邏輯的分配,不宜過分集中在某個(gè)控制器上,主要控制器應(yīng)采用冗余配置。
3、電源設(shè)計(jì)
電源設(shè)計(jì)必須合理可靠。注意電源設(shè)計(jì)的負(fù)荷率和電源的冗余配置方式,保證兩路獨(dú)立電源。
4、DCS系統(tǒng)接口
注重DCS系統(tǒng)接口的可靠性,注意重要接口的接口方式和冗余度。in essence, it is to control the deviation accumulation until the deviation is zero. The integral control always exerts a force pointing to the given value, which is conducive to eliminating the static error. Its effect is related not only to the size of the deviation, but also to the duration of the deviation. Simply put, it is to accumulate the deviation and calculate the general ledger together. Differential control: it can be sensitive to the change trend of error, and can correct the error before the error signal appears. It is conducive to improve the rapidity of output response, reduce the overshoot of controlled quantity and increase the stability of the system. However, the differential action can easily amplify the high-frequency noise and reduce the signal-to-noise ratio of the system, which reduces the ability of the system to suppress interference. Therefore, in practical application,