Interrupt Response Time; Overview - Siemens Simatic S7-300 Technical Data Manual

5.5

Interrupt response time

5.5.1

Overview

Definition of interrupt response time
The interrupt response time is the time that expires between the first occurrence of an
interrupt signal and the call of the first interrupt OB instruction. Generally valid: Higher-
priority interrupts take priority. This means that the interrupt response time is increased by
the program processing time of the higher-priority interrupt OBs and the interrupt OBs of
equal priority which have not yet been executed (queued).
Process/diagnostic interrupt response times of the CPUs
Table 5-13
CPU
CPU 312
CPU 312C
CPU 313C
CPU 313C-2
CPU 314
CPU 314C-2
CPU 315-2 DP
CPU 315-2 PN/DP
CPU 317-2 DP
CPU 317-2 PN/DP
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05
Process/diagnostic interrupt response times
Process interrupt response times
external external
min. max.
0.5 ms 0,8 ms
0.5 ms 0,8 ms
0,4 ms 0,6 ms
0,4 ms 0,7 ms
0,4 ms 0,7 ms
0,4 ms 0,7 ms
0,4 ms 0,7 ms
0,2 ms 0,3 ms
Cycle and reaction times
5.5 Interrupt response time
Diagnostic interrupt response
times
Integrated I/O Min.
max.
- 0.5 ms
0,6 ms 0.5 ms
0.5 ms 0,4 ms
0.5 ms 0,4 ms
- 0,4 ms
0.5 ms 0,4 ms
- 0,4 ms
- 0,2 ms
Max.
1,0 ms
1,0 ms
1,0 ms
1,0 ms
1,0 ms
1,0 ms
1,0 ms
0,3 ms
5-21