Siemens CPU 315-2 DP Reference Manual

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PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Cycle and Reaction times
Introduction
In this section, we explain what the cycle time and the response time of the S7-300
consist of.
You can use the programming device to read the cycle time of your user program
(see the STEP 7 online help system).
The example below shows you how to calculate the cycle time.
The response time is more important for the process. In this chapter we will show
you in detail how to calculate the response time.
In This Section
Section Contents Page
3.1 Cycle Time 3-2
3.2 Response Time 3-3
3.3 Calculation Example for Cycle Time and Response Time 3-10
3.4 Interrupt Response Time 3-14
3.5 Calculation Example for the Interrupt Response Time 3-16
3.6 Reproducibility for Delay and Watchdog Interrupt 3-16
Execution times
 for the STEP 7 instructions processed by the CPU
 for the SFCs/SFBs integrated in the CPUs
 for IEC functions you can call in STEP 7
can be found in the S7300 Instruction List
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Siemens CPU 315-2 DP Specifications

General

Memory	64 KB
Power Supply	24 V DC
Order Number	6ES7 315-2AG10-0AB0
Number of DP Masters	1
Number of DP Slaves	124
Load Memory	64 KB
Number of Timers	256
Number of Counters	256
Data Memory	64 KB
Operating Temperature	0 to 60 °C
Integrated Interfaces	MPI, DP
Digital Outputs	Not integrated
Analog Inputs	Not integrated
Analog Outputs	Not integrated
Programming Languages	LAD, FBD, STL
Digital Inputs	Not integrated
Weight	660 g