Technical data

Min. polling
cycle time:
Here you select the time intervals at which the DP
polling list is processed.
Once all the jobs in the DP polling list have been
executed, the processing of the DP polling list is only
restarted after this cycle time has elapsed.
Setting the times:
For the configured times:
- Minimum polling cycle time
- Highest min. slave interval
- Watchdog time
of the slaves, the following four conditions must be met:
(1) Min polling cycle time >= 2 x highest min.. slave
interval
(2) 10 ms <= min. Polling cycle time <= (watchdog-
time - 30 ms)
(3) Watchdog time <= 9900 ms
(4) Watchdog time must be divisible by 100.
The configured min. polling cycle time is also checked
by the CP to make sure that the CP can operate
correctly with the time.
The minimum value depends directly on the number of
active slaves and corresponds to the lowest min. polling
cycle time. If you select a value below this when
configuring, the error LED flashes to indicate a DP
slave parameter assignment error (see Section 4.1.1.2).
Note:
- All three times apply to all slaves!
- The I/O list for the configured slaves can be re-called
with (F3) LIST.
B8976060/02 Distributed I/Os (DP)
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