Siemens SIMATIC S7-300 Module data Technical Data

Cycle and reaction times
5.3 Response time
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
5-15
DP cycle times in the PROFIBUS DP network
If you have configured your PROFIBUS DP master system in STEP 7, STEP 7 calculates the
typical DP cycle time to be expected. You can then view the DP cycle time of your
configuration on the PG.
The figure below gives you an overview of the DP cycle time. In this example, let us assume
that the data of each DP slave has an average length of 4 bytes.
6ms
4ms
2ms
2 4 8 16 32
1ms
3ms
5ms
7ms
64
17 ms
1
Bus runtime
Number of DP slaves;
maximum number is
dependent on CPU
Minimum
slave interval
Transmission rate 1.5 Mbit/s
Transmission rate 12 MBit/s
With multi-master operation on a PROFIBUS-DP network, you must make allowances for the
DP cycle time at each master. That is, you will have to calculate the times for each master
separately and then add up the results.

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)