Siemens SIMATIC S7-300 Module data Technical Data

Memory concept
4.1 Memory areas and retentivity
CPU 31xC and CPU 31x, Technical data
4-6 Manual, Edition 08/2004, A5E00105475-05
Process image update
The operating system updates the process image periodically. The figure below shows the
sequence of this operation within a cycle.
Cycle time
Startup
PIO
PII
User program
CCP (OS)
Startup program
Processing the user program (OB 1)
and all programs called inside of it.
Writing the process image of the outputs
into the modules.
Reading the inputs from the modules
and refreshing the data in the process
image of the inputs.

Siemens SIMATIC S7-300 Module data Specifications

General

Series	S7-300
Manufacturer	Siemens
Protection Class	IP20
System	SIMATIC S7-300
Digital Inputs	Varies by module
Digital Outputs	Varies by module
Analog Inputs	Varies by module
Analog Outputs	Varies by module
Central Processing Unit	Varies by CPU model
Supply Voltage	24V DC or 120/230V AC
CPU Type	Varies (e.g., CPU 312, CPU 315, etc.)
Memory	Varies by CPU model
Communication Interfaces	MPI, PROFIBUS
Programming Languages	LAD, FBD, STL, SCL, GRAPH
Operating Temperature	0°C to 60°C
Storage Temperature	-40°C to 70°C
Relative Humidity	10% to 95% (non-condensing)