User Program Processing Time For The Cpu 41X-4H; Increase In Cycle Time By Nesting Interrupts - Siemens SIMATIC S7-400 Reference Manual

Increasing the Cycle Time of the CPU 41x-4H
With the CPU 41x-4H, you must further multiply the calculated cycle time by a
factor specific to the CPU in question. This factor is shown in the table below:
Table 3-5
Process
Factor
Operating System Scan Time at the Scan Cycle Checkpoint
The table below lists the operating system scan times at the scan cycle checkpoint
of the CPUs.
Table 3-6
Process
Scan cycle
control at the
SCC

Increase in Cycle Time by Nesting Interrupts

Table 3-7 Increase in Cycle Time by Nesting Interrupts
CPU Hardware
Interrupt
520 ms
CPU 412-1/-2
370 ms
CPU 414-2/-3
300 ms
CPU 416-2/-3
m
CPU 417-4 370 s
m
CPU 41x-4 H 390 s
single mode
m
CPU 41x-4 H 705 s
redundant
You have to add the program execution time at the interrupt level to this increase.
If several interrupts are nested, their times must be added together.
Automation System S7-400 CPU Specifications
A5E00165965-01

User program processing time for the CPU 41x-4H

CPU 41x-4H single mode
1.03
Operating system scan time at scan cycle checkpoint
CPU CPU
412-1 414-2
412-2 414-3
240 ms 170 ms
Diagnostic Day
Interrupt Interrupt
590 ms 490 ms
420 ms 350 ms
340 ms 280 ms
m m
420 s 350 s
m m
450 s 310 s
m m
785 s 560 s
Cycle and Reaction Times of the S7-400
CPU 41x-4H redundant
CPU CPU 417-4
416-2
416-3
135 ms 170 ms
Time-Delay Watchdog
Interrupt Interrupt
370 ms 370 ms
260 ms 260 ms
210 ms 210 ms
m
260 s 260
m
270 s 255
m
530 s 530
1.14
CPU CPU
41x-4H 41x-4H
single redundant
mode
190 395
-1770 ms - 1865 ms
∅ 200 ms ∅ 445 ms
Programming/
Periphery
Access Error
m
s / 190 ms
180
m
s / 140 ms
130
m
s / 105 ms
100
m m m
s 130 s / 140 s
m m m
s 140 s / 170 s
m m m
s 175 s / 240 s
3-7