Siemens SIMATIC S7-300 Module data Technical Data

Cycle and reaction times
5.3 Response time
CPU 31xC and CPU 31x, Technical data
5-18 Manual, Edition 08/2004, A5E00105475-05
Calculation
The (longest) response time is the sum of:
Table 5-11 Formula: Longest response time
2 x process image transfer time for the inputs
+ 2 x process image transfer time for the outputs
+ 2 x program processing time
+ 2 × operating system processing time
+ 2 x program processing time
+ 4 x PROFINET IO update time (only if PROFINET IO is used.)
+ 4 x DP cycle time on PROFIBUS DP (only if PROFIBUS DP is used.)
+ I/O delay
= Longest response time
Equivalent to the sum of 2 x the cycle time + I/O delay time + 4 x times the PROFINET IO
update time or 4 x times the DP cycle time on PROFIBUS DP.
See also
Overview (Page 5-14)
5.3.4 Reducing the response time with direct I/O access
Reducing the response time
You can reach faster response times with direct access to the I/O in your user program, e.g.
with
• L PIB or
• T PQW
you can partially avoid the response times described above.
Note
You can also achieve fast response times by using process interrupts.
See also
Shortest response time (Page 5-16)
Longest response time (Page 5-17)

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)