Siemens Simatic S7-1500 / ET 200MP - Basics of Program Execution; Events and Obs

Automation system
System Manual, 01/2023, A5E03461182-AK
207
Basics of program execution
9
9.1 Events and OBs
Triggers
The table below gives an overview of the possible event sources for start events and their
OBs.
Table 9- 1 Triggers
Event sources Possible priorities (default
priority)
Possible OB
numbers
Default system
reaction
1)
Number of OBs
Startup
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 (16)
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
Isochronous mode interrupt
16 to 26 (21)
61 to 64, ≥ 123
Ignore
0 to 2
Time error
3)
22
80
Ignore
0 or 1
Maximum cycle time exceed-
ed once
STOP
Diagnostic interrupt
2 to 26 (5)
82
Ignore
0 or 1
Removal/insertion of modules
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 (26)
91
Not applicable
0 or 1
MC pre-servo
4)
corresponds to priority of the
MC-Servo
67 Not applicable 0 or 1
MC post-servo
4)
corresponds to priority of the
MC-Servo
95
Not applicable
0 or 1
MC interpolator
4)
16 to 26 (24)
92
Not applicable
0 or 1
MC pre-interpolator
4)
corresponds to priority of the
MC interpolator
68
Not applicable
0 or 1
MC-LookAhead
4)
15 to 16 (15)
97
Not applicable
0 or 1
MC-Transformation
4)
17 to 25 (25)
98
Not applicable
0 or 1