Siemens S7-300 appendix Interrupt response time, Definition of interrupt response time

Cycle and reaction times 5.5 Interrupt response time

5.5Interrupt response time

5.5.1Overview

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 Process/diagnostic interrupt response times
		Process interrupt response times			Diagnostic interrupt response
					times
CPU		external	external	Integrated I/O	Min.	Max.
		min.	max.	max.
CPU	312	0.5 ms	0,8 ms	-	0.5 ms	1,0 ms
CPU	312C	0.5 ms	0,8 ms	0,6 ms	0.5 ms	1,0 ms
CPU	313C	0,4 ms	0,6 ms	0.5 ms	0,4 ms	1,0 ms
CPU	313C-2	0,4 ms	0,7 ms	0.5 ms	0,4 ms	1,0 ms
CPU	314	0,4 ms	0,7 ms	-	0,4 ms	1,0 ms
CPU	314C-2	0,4 ms	0,7 ms	0.5 ms	0,4 ms	1,0 ms
CPU	315-2 DP	0,4 ms	0,7 ms	-	0,4 ms	1,0 ms
CPU	315-2 PN/DP
CPU	317-2 DP	0,2 ms	0,3 ms	-	0,2 ms	0,3 ms
CPU	317-2 PN/DP

CPU 31xC and CPU 31x, Technical data	5-21
Manual, Edition 08/2004, A5E00105475-05