METSO IOP320

與METSO IOP320控制系統(tǒng)連接的各類信號(hào)傳輸線，除了傳輸有效的各類信號(hào)之外，總會(huì)有外部干擾信號(hào)侵入。此干擾主要有兩種途徑：一是通過變送器或共用信號(hào)儀表的供電電源串入的電網(wǎng)干擾，這往往被忽略；二是信號(hào)線受空間電磁輻射感應(yīng)的干擾，即信號(hào)線上的外部感應(yīng)干擾，這是很嚴(yán)重的。由信號(hào)引入干擾會(huì)引起I/O信號(hào)工作異常和測(cè)量精度大大降低，嚴(yán)重時(shí)將引起元器件損傷。對(duì)于隔離性能差的系統(tǒng)，還將導(dǎo)致信號(hào)間互相干擾，引起共地系統(tǒng)總線回流，造成邏輯數(shù)據(jù)變化、誤動(dòng)和死機(jī)。METSO IOP320控制系統(tǒng)因信號(hào)引入干擾造成I/O模件損壞數(shù)相當(dāng)嚴(yán)重，由此引起系統(tǒng)故障的情況也很多。

All kinds of signal transmission lines connected with METSO IOP320 control system will always be invaded by external interference signals in addition to transmitting all kinds of effective signals. There are two main ways of this interference: one is the power grid interference connected in series through the power supply of transmitters or common signal instruments, which is often ignored; Second, the signal line is disturbed by the induction of space electromagnetic radiation, that is, the external induction interference on the signal line, which is very serious. The interference introduced by the signal will cause the I / O signal to work abnormally and the measurement accuracy will be greatly reduced, and the components will be damaged in serious cases. For the system with poor isolation perbance, it will also cause mutual interference between signals, cause common ground system bus backflow, and cause logic data change, misoperation and crash. The number of I / O modules damaged in METSO IOP320control system due to signal interference is quite serious, resulting in many system faults.

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