Process channel faults The most common process channel faults are I/O card faults:I/O card faults are generally judged and dealt with through system diagnosis,channel replacement or replacement of spare parts,as for the aging of internal components or other The damage caused by the cause is generally not easy for thermal control personnel to judge.The maintenance of the I/O card is generally handled by the manufacturer,and the current means of thermal control maintenance personnel cannot achieve the same maintenance as the maintenance of conventional instruments.And the manufacturer’s I/O cards have been made into an integrated trend,so only spare parts can be purchased.Fortunately,this type of failure only occurs in the debugging stage,and the probability of occurrence in normal operation is very low.
过程通道故障过程通道故障出现最的多的是I／O卡故障：I／O卡故障一般的判断与处理，通过系统诊断，更换通道或通过更换备用件处理，至于其内部元件老化或是其他原因造成的损坏，一般热控制人员不好判断。I／O卡的检修一般是由厂家处理，目前的热控检修人员的手段还不能达到像检修常规仪表那样检修。而且生产厂家的I／O卡件已制造成一体化的趋势，这样只能购买备件。好在这类故障只是在调试阶段出现较多，正常运行中出现几率很低。
