Siemens SIMATIC S7-300 Module data Technical Data

Cycle and reaction times
5.2 Cycle time
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
5-13
Additional marginal conditions
The maximum cycle load through communication in the measurement is 20 %.
The lower graphic shows that the OB1 cycle is influenced by increasing the cyclical
PROFINET interconnections to remote partners at PROFINET:
032
64
96
128 160
200
0
2
4
6
8
10
12
14
Cycle time in ms
Dependency of the OB1 cycle on the number of interconnections
Number of interconnections
OB1 cycle with 32 remote
PROFINET partners
OB1 cycle with 5 remote
PROFINET partners
Base load through PROFIBUS devices
The 16 PROFIBUS devices with their interconnections among each other generate an
additional base load of up to 1,0 ms.
Tips and notes
The upper graphic already includes the use of uniform values for the transfer frequency of all
interconnections to a partner.
• The performance can drop by up to 50 % if the values are distributed to different
frequency levels.
• The use of data structures and arrays in an interconnection instead of many single
interconnections with simple data structures increases the performance.

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)