Siemens SIMATIC ET 200pro - 3.5 Assembling special modules and motor starters

CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 11/2019, A5E35873416-AC
48
Basics of program execution
6
6.1 Events and OBs
Response to triggers
The occurrence of a trigger results in the following reaction:
● If the event comes from an event source to which you have assigned an OB, this event
triggers the execution of the assigned OB. The event enters the queue according to its
priority.
● If the event comes from an event source to which you have not assigned an OB, the CPU
executes the default system reaction.
Note
Some event sources, such as startup, pull/plug, exist even if you do not configure them.
Triggers
The table below gives an overview of the possible event sources for start events and their
OBs:
Table 6- 1 Triggers
Types of 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
3)
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 1
Time error
4)
22 80
Ignore
0 or 1
Maximum cycle time exceeded once
STOP
Diagnostics interrupt
2 to 26 (5)
82
Ignore
0 or 1
Removal/insertion of modules
2 to 26 (6)
83
Ignore
0 or 1