OB86里面当然可以不写程序，主要看你想让OB86做什么活。楼主建议你先理解中断的含义，然后看一下OB86的help，再结合它的声明表部分，试着去理解，你理解了，也就知道自己可以用它来做什么了，你的付出会有收获的。以前我处理过这样类似的问题，是做到WinCC上监控和显示的，你要在PLC的Q点输出，稍加修改就可以了。下面提供一些代码给你参考，希望对你有所帮助！
L #OB86_EV_CLASS //Event class and identifiers:B#16#38=outgoing event;B#16#39=incoming event
T DB400.DBB 8

L #OB86_FLT_ID //Error code:(possible values B#16#C1, B#16#C2, B#16#C3, B#16#C4, B#16#C5, B#16#C6, B#16#C7, B#16#C8)
T DB400.DBB 9

L #OB86_MDL_ADDR //Logical base address of the DP master
T DB400.DBW 10

L LW 8 //logical base address of an S7 slave or diagnostic address of a standard DP slave
T DB400.DBW 12

L LB 10
T DB400.DBB 14 //DP master system ID

L LB 11 //No. of the DP SLAVE ID
T DB400.DBB 15


L #OB86_EV_CLASS //WHEN THE EVENT OUTGOING ,GOTO M001
L B#16#38
==I
JC M001



L LB 11
L 4
==I
S DB400.DBX 16.4 //SET DP SLAVE4 FAULT MEMORY

L LB 11
L 5
==I
S DB400.DBX 16.5 //SET DP SLAVE5 FAULT MEMORY

L LB 11
L 6
==I
S DB400.DBX 16.6 //SET DP SLAVE6 FAULT MEMORY


BEU

M001: L LB 11
L 4
==I
R DB400.DBX 16.4 //RESET DP SLAVE4 FAULT MEMORY

L LB 11
L 5
==I
R DB400.DBX 16.5 //RESET DP SLAVE5 FAULT MEMORY

L LB 11
L 6
==I
R DB400.DBX 16.6 //RESET DP SLAVE6 FAULT MEMORY