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Siemens SIMATIC S7-300 Series - Page 14

Siemens SIMATIC S7-300 Series
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Contents
xii
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2.6 Diagnosis of the CPU 31x-2 operating as DP-Slave 2-18 . . . . . . . . . . . . . . . . . .
2.6.1 Diagnosis with LEDs 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.2 Diagnostics with STEP 5 or STEP 7 2-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.3 Reading Out the Diagnostic Data 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.4 Format of the Slave Diagnostic Data 2-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.5 Station Status 1 to 3 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.6 Master PROFIBUS Address 2-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.7 Manufacturer ID 2-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.8 Module Diagnostics 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.9 Station Diagnostics 2-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.10 Interrupts 2-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Direct Data Exchange 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 Diagnosis with Direct Communication 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Cycle and Reaction times
3.1 Cycle time 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Response Time 3-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Calculation Examples 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 of Delay and Watchdog Interrupts 3-16 . . . . . . . . . . . . . . . . . . . .
4 CPU Function, depending on CPU and STEP 7 Version
4.1 Differences between CPU 3182 and CPUs 312 IFM to 3162 DP 4-2 . . . . . . .
4.2 The Differences Between the CPUs 312 IFM to 318 and
Their Previous Versions 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Tips and Tricks
A Standards, Certificates and Approvals
B Dimensioned Drawings
C List of Abbreviations
Glossary
Index

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