Siemens SIMATIC S7-1500 Automation System User Manual

Basics of program processing
13.2 CPU overload behavior
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
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Threshold mechanism for time error OB request
The OB parameter "Enable time error" is used to specify whether the time error interrupt
should be called when a specific overload level is reached for similar events.
If yes (check box selected), you use the OB parameter "Event threshold for time error" to
specify the number of similar events in the queue at which the time error interrupt should be
called. If this parameter has the value 1, for example, the event DW#16#0002:3502 is
entered once in the diagnostics buffer and the time error interrupt is requested when the
second event occurs. Additional diagnostic buffer entries of the event DW#16#0002:3502
that refer to this event source are suppressed until all events from this source have been
post-processed.
In the event of an overload, you therefore have the option of programming a reaction well
before the limit is reached for similar events and thus before the events are discarded.
The following value range applies to the "Event threshold for time error" parameter: 1 ≤
"Event threshold for time error" ≤ "Events to be queued".

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