Addressing and Access to I/Os
S5-90U/S5-95U
4. Execution Time for Internal Timers
All internal timers parameterized (see 6.5) are updated by the operating system in intervals of
10 ms. The time required by the operating system for a single updating cycle of all timers
parameterized is as follows:
S5-95U:
t
T
=(number of timers parameterized)
•
33
µ
s
For the S5-90U, the number of parameterized timers is fixed to 32.
S5-90U:
t
T
=1056
µ
s 1 ms
For any interval t
X
under consideration, the timers are updated
(1+
)
times during that interval.
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
t
X
10 ms
Total time requirement:
Execution time for internal timers =
(1+
)
•
t
T
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
a a a a a a a a a a
t
X
10 ms
6-20
EWA 4NEB 812 6115-02b
Содержание SIMATIC S5-90U
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