affect a change 中文? the allowable interactions between the dcs and sis are force, local override, write and release. in all cases the sis is requesting the dcs to change a parameter value in order to affect a change . the sis can request three types of changes: 1. force a change to a dcs parameter . 2. force a pid controller to local override. 3. write to a dcs parameter. [ ]查看更多