Siemens SIMATIC S7-1500 Automation System User Manual

S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
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Basics of program processing
13
13.1 Events and OBs
OB start events
The occurrence of an OB start event 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. This means that the event is positioned in a
queue that corresponds to its priority.
● If the event comes from an event source to which you have not assigned an OB, the
default system reaction is executed.
Note
Some event sources, such as startup, pull/plug, exist even if you do not configure them.

Siemens SIMATIC S7-1500 Automation System Specifications

General

Series	SIMATIC S7-1500
Programming	TIA Portal (Totally Integrated Automation Portal)
Protection Class	IP20
CPU	Various models available (e.g., CPU 1511-1 PN, CPU 1518-4 PN/DP)
Controller Type	Modular Controller
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Communication Interfaces	PROFINET, PROFIBUS, Ethernet, OPC UA
Digital Inputs	Varies by model and expansion modules
Digital Outputs	Varies by model and expansion modules
Analog Inputs	Varies by model and expansion modules
Analog Outputs	Varies by model and expansion modules
Backplane Bus	High-speed backplane bus for fast communication between modules
Redundancy	Supported with specific models and configurations
Safety	Integrated safety functions available
Scalability	Highly scalable with modular expansion
Operating Temperature	0°C to 60°C