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Logic functions | Disabling element [Filtering/Time]
11.4
Disabling element [Filtering/Time]
The disabling element has a 1-bit input and a 1-bit output as well as a disabling ob-
ject. Input states (ON/OFF) can be delayed independently of one another and filtered
at the output before output. The filter makes it possible to invert the states of the out-
put (e.g. ON -> OFF) or to suppress it completely
(e.g. OFF -> ---, OFF is not transmitted). If the filter is not used, the disabling element
only works with the time functions if required. Alternatively, it is possible to use only
the filter (without delays).
The disabling object is able to deactivate the disabling element.
The parameter "Time function" defines whether ON or OFF telegrams or both states
are evaluated with a delay after reception at the input. If a delay is provided, the
delay time can be configured separately for ON and OFF telegrams. A delay is only
effective if the delay time is set to greater than "0". Each telegram received at the in-
put re-triggers the receptive delay time.
If no delay is configured, the input telegrams go directly into the filter.
Special feature when using the delays: If no telegram is received at the input,
a configured delay time (time > 0) acts like an automatic cyclic trigger of the fil-
ter. The most recently received input status is then forwarded to the filter auto-
matically and repeatedly after the delay has elapsed. This then works accord-
ing to its configuration and forwards the result to the output of the disabling
element. Consequently, the output then also transmits telegrams depending
on the transmission criteria set. If the cyclical transmission of the output is not
desired due to the automatic triggering of the filter, the transmission criterion
should be set to "only transmit if the output changes".
If no delay is provided, the filter is only triggered automatically via the received
telegrams and thus not automatically.
After bus voltage return or after an ETS programming operation, the delays
are triggered automatically.
The filter is set by the parameter "Filter function" according to the following table.
Filter function
ON -> OFF / OFF -> OFF
ON -> --- / OFF -> OFF
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Image 46: Disabling element [Filtering/Time]
Result
Input telegrams are forwarded to the output un-
changed. Filter deactivated.
ON telegrams are filtered and not forwarded to the
output. OFF telegrams are forwarded to the output
unchanged.
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