Basics of program execution
8.1
Events and OBs
Start events
The table below gives an overview of the possible event sources for start events and their
OBs.
Table 8- 1
Start events
Types of event sources
Starting
2)
Cyclic program
2)
Time-of-day interrupt
2)
Time-delay interrupt
2)
Cyclic interrupt
2)
Hardware interrupt
2)
Status interrupt
Update interrupt
Manufacturer-specific or
profile-specific interrupt
Synchronous cycle interrupt
Time error
3)
Cycle monitoring time ex-
ceeded once
Diagnostics interrupt
Pull/plug interrupt for mod-
ules
Rack error
MC-servo
4)
MC-PreServo
4)
MC-PostServo
4)
MC-Interpolator
4)
143
Possible priorities (default
priority)
1
1
2 to 24 (2)
2 to 24 (3)
2 to 24 (8 to 17, frequency
dependent)
2 to 26 (18)
2 to 24 (4)
2 to 24 (4)
2 to 24 (4)
16 to 26 (21)
22
2 to 26 (5)
2 to 26 (6)
2 to 26 (6)
17 to 26 (25)
17 to 26 (25)
17 to 26 (25)
16 to 26 (24)
Possible OB num-
Default system
bers
response
100, ≥ 123
Ignore
1, ≥ 123
Ignore
10 to 17, ≥ 123
Not applicable
20 to 23, ≥ 123
Not applicable
30 to 38, ≥ 123
Not applicable
40 to 47, ≥ 123
Ignore
55
Ignore
56
Ignore
57
Ignore
61 to 64, ≥ 123
Ignore
80
Ignore
STOP
82
Ignore
83
Ignore
86
Ignore
91
Not applicable
67
Not applicable
95
Not applicable
92
Not applicable
System Manual, 09/2019, A5E03576849-AJ
8
Number of OBs
1)
0 to 100
0 to 100
0 to 20
0 to 20
0 to 20
0 to 50
0 or 1
0 or 1
0 or 1
0 to 2
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
Distributed I/O system