ob的作用如下：
ob1(freecycle)順序掃描
ob10～ob17（time-of-dayinterrupt）時(shí)間-日期中斷
ob20～ob23（time-delayinterrupt）時(shí)間延遲中斷
ob30～ob38（cyclicinterrupt）周期性中斷
ob40～ob47（hardwareinterrupt）硬件中斷
ob55（statusinterrupt）狀態(tài)中斷
ob56（updateinterrupt）升級(jí)中斷
ob57（manufacturerinterrupt）廠商專用中斷
ob61～ob64(synchronouscycleinterrupt)異步周期中斷
ob70（i/oredundancyerror）i/o冗余錯(cuò)誤
ob72（cpuredundancyerror）cpu冗余錯(cuò)誤
ob73(communicationerror)通信錯(cuò)誤
ob80(timeerror)時(shí)間錯(cuò)誤
ob81(powersupplyerror)電源錯(cuò)誤
ob82(diagnosticinterrupt)診斷中斷
ob83(insert/removeinterrupt)插/拔中斷
ob84(cpuhardwarefault)cpu硬件錯(cuò)誤
ob85(priorityclasserror)優(yōu)先級(jí)錯(cuò)誤
ob86(rackfailure)機(jī)架錯(cuò)誤
ob87(communicationerror)通信錯(cuò)誤
ob88(processinginterrupt)過(guò)程錯(cuò)誤
ob90(backgroundob)背景ob
ob100(warmrestart)暖啟動(dòng)
ob101(hotrestart)熱啟動(dòng)
ob102(coldrestart冷啟動(dòng)
ob121(programmingerror)編程錯(cuò)誤
ob122(i/oaccesserror)i/o存儲(chǔ)錯(cuò)誤
注：ob55,ob56,ob57,ob61,ob62,ob63,ob64,ob81,ob84,ob87,ob88,ob90是nop（空操作）用戶不需要用戶不需要修改調(diào)用空操作的程序。