Siemens 6MD85, Manual

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[dw_chatter-block-01, 1, en_US]
Figure 3-81 Signal Change during Chatter Blocking with too Important Number of Signal State Changes
During 2nd Subsequent Test Time
(1) The input signal is permanently blocked starting from this point in time.
Example 2: Temporary Blocking
The chatter-blocking settings are set as follows:
•
No. permis.state changes
= 4
•
No. of chatter tests
= 2
After more than 4 state changes within the
Initial test time
, the input signal is set to the original state
by the chatter blocking and the oscillatory quality is assigned. Additionally, a corresponding indication is
added to the operational log. At the same time, the
Chatter blocking
indication is set. After expiry of the
settable
Chatter idle time
, during the following
Subsequent test time
, it is checked whether the
input signal is still chattering. This check is repeated, as the
No. of chatter tests
is set to 2 in this
example.
If, during the 2nd
Subsequent test time
, it has been detected that the number of state changes of the
input signal is within the set
No. permis.state changes
, the temporary blocking of state changes of the
signal is removed and the actual signal state is released.
The quality bit oscillatory is removed and the
Chatter blocking
indication is reset. As the temporary
blocking of the signal is removed, the
Group warning
indication is not set. The chatter test starts again.
System Functions
3.8 Other Functions
146 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017