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
5-5
5.2.2 Calculating the cycle time
Introduction
The cycle time is derived from the sum of the following influencing factors.
Process image update
The table below shows the time a CPU requires to update the process image (process
image transfer time). The times specified might be prolonged as a result of interrupts or CPU
communication. The process image transfer time is calculated as follows:
Table 5-2 Formula for calculating the process image (PI) transfer time
The transfer time of the process image is calculated as follows:
Base load K + number of bytes in PI in module rack 0 x (A)
+ number of bytes in PO in module rack 1 to 3 x (B)
+ number of words in PO via DP x (D)
+ number of words in PO via PROFINET x (P)
= Transfer time for the process image
Table 5-3 CPU 31xC: Data for calculating the process image (PI) transfer time
Const. Portions CPU
312C
CPU
313C
CPU
313C-2
DP
CPU
313C-2
PtP
CPU
314C-2
DP
CPU
314C-2
PtP
K Base load 150 μs 100 μs 100 μs 100 μs
A per byte in module rack 0 37 μs 35 μs 37 μs 37 μs
B per byte in module
racks 1 to 3 *
- 43 μs 47 μs 47 μs
D
(DP only)
per WORD in the DP area
for the integrated DP
interface
- - 1 μs - 1 μs -

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)