Technical data

Basics of Designing a Program Structure
4.2 Blocks in the User Program
Programming with STEP 7
74 Manual, 05/2010, A5E02789666-01
Type of Interrupt Organization Block Priority Class
(Default)
See also
Hardware
interrupts
OB40
OB41
OB42
OB43
OB44
OB45
OB46
OB47
16
17
18
19
20
21
22
23
Hardware Interrupt Organization
Blocks (OB40 to OB47)
DPV1 interrupts OB 55
OB 56
OB 57
2
2
2
Programming DPV1 Devices
Multicomputing
interrupt
OB60 Multicomputing 25 Multicomputing - Synchronous
Operation of Several CPUs
Synchronous
cycle interrupt
OB 61
OB 62
OB 63
OB 64
25 Configuring Short and Equal-Length
Process Reaction Times on
PROFIBUS-DP
Redundancy
errors
OB70 I/O Redundancy Error
(only in H systems)
OB72 CPU Redundancy Error
(only in H systems)
25
28
"Error Handling Organization Blocks
(OB70 to OB87 / OB121 to OB122)"
Asynchronous
errors
OB80 Time Error
OB81 Power Supply Error
OB82 Diagnostic Interrupt
OB83 Insert/Remove Module
Interrupt
OB84 CPU Hardware Fault
OB 85 Program Cycle Error
OB86 Rack Failure
OB87 Communication Error
25
(or 28 if the
asynchronous error
OB exists in the
startup program)
Error Handling Organization Blocks
(OB70 to OB87 / OB121 to OB122)
Background cycle OB90 29
1)
Background Organization Block
(OB90)
Startup OB100 Restart
(Warm start)
OB101 Hot Restart
OB102 Cold Restart
27
27
27
Startup Organization Blocks
(OB100/OB101/OB102)