OB1 End of startup or end of OB1
OB10,OB11,OB12,OB13,OB14,OB15,OB16,OB17 Time-of-day interrupt (No default time specified)
OB20,OB21,OB22,OB23 Time-delay interrupt (No default time specified)
OB30,OB31,OB32,OB33,OB34,OB35,OB36,OB37,OB38 Cyclic interrupts
Cyclic interrupt 0 (default interval: 5 s)
Cyclic interrupt 1 (default interval: 2 s)
Cyclic interrupt 2 (default interval: 1 s)
Cyclic interrupt 3 (default interval: 500 ms)
Cyclic interrupt 4 (default interval: 200 ms)
Cyclic interrupt 5 (default interval: 100 ms)
Cyclic interrupt 6 (default interval: 50 ms)
Cyclic interrupt 7 (default interval: 20 ms)
Cyclic interrupt 8 (default interval: 10 ms)
OB40,OB41,OB42,OB43,OB44,OB45,OB46,OB47 Hardware interrupts
OB55 Status interrupt DPV1 interrupts
OB56 Update interrupt
OB57 Manufacturer specific interrupt
OB60 SFC35 "MP_ALM" call 25 Multicomputing interrupt
OB 61,OB 62,OB 63,OB 64 Synchronous Cycle Interrupt
Synchronous Cycle Interrupt 1
Synchronous Cycle Interrupt 2
Synchronous Cycle Interrupt 3
Synchronous Cycle Interrupt 4
OB 65 Technology synchronization interrupt
OB70,OB72,OB 73 I/O redundancy error (only in H CPUs)CPU redundancy error (only in H CPUs)Communication redundancy error OB (only in H CPUs)
OB80 Time error Asynchronous error interrupts
OB81 Power supply fault
OB82 Diagnostic interrupt
OB83 Insert/remove module interrupt
OB84 CPU hardware fault
OB85 Program error
OB86 Failure of an expansion rack, DP master system or station for distributed I/Os
OB87 Communication error
OB 88 Processing interrupt
OB90 Warm or cold restart or delete a block being executed in OB90 or load an OB90 on the CPU or terminate OB90 (Background cycle)
OB100,OB101,OB102 Warm restartHot restartCold restart Startup
OB121,OB122 Programming errorI/O access error Priority of the OB causing the error