Siemens Simatic S7-400 User Manual

Special functions of a CPU 41x
3.3 System modifications during operation
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
3-9
3.3.3 Software requirements
Software Requirements for System Modifications during Operation
To be able to make configuration changes in RUN, the user program must meet the following
requirement: It must be written so that, for example, station failures, module faults or
timeouts do not cause the CPU to change to STOP.
The following OBs must be available on your CPU:
● Hardware interrupt OBs (OB 40 to OB 47)
● Time jump OB (OB80)
● Diagnostic interrupt OB (OB82)
● Remove/insert OB (OB83)
● CPU hardware fault OB (OB84)
● Program execution error OB (OB85)
● Rack failure OB (OB86)
● I/O access error OB (OB122)

Siemens Simatic S7-400 Specifications

General

Programming Language	STEP 7 (LAD, FBD, STL, SCL, GRAPH)
Communication Interfaces	MPI, PROFIBUS
Power Supply	24 V DC, 120/230 V AC (Power supply modules are separate and chosen based on system requirements)
Operating Temperature	0°C to 60°C
Mounting	Rack mounting
Processor	CPU 412-1, CPU 414-2, CPU 416-2, CPU 417-4 (Different CPUs offer varying performance and features)
Relative Humidity	5 to 95% (non-condensing)