Siemens SIMATIC ET 200SP - 8 Basics of Program Execution; Events and Obs

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