Digital Noise Filter (Di.03); Invert The Inputs (Di.04); Input Trigger (Di.05); Strobe-Dependent Inputs (Di.06, Di.07, Di.08) - KEB COMBIVERT R6-S Applications Manual

Digital in- and outputs

3.4.5 Digital noise filter (di.03)

The digital noise filter reduces the sensitivity against disturbances at the digital inputs. Only hardware inputs
can be filtered. Each input has a separate filter counter, which counts upward at active input and downward at
inactive input. The output of the filter is set on reaching the filter time and reset when reaching zero.
Parameter
di.03
Priority of the filter times: the higher time is used.

3.4.6 Invert the inputs (di.04)

With parameter di.04 can be adjusted whether a signal is 1- or 0- active (inverted). The parameter is bit-coded,
i.e. the appropriate value of the input must be entered. If several inputs shall be inverted, the sum is to be for-
med (Exception: inverting of the control release remains without function).

3.4.7 Input trigger (di.05)

As standard the COMBIVERT is controlled with static signals i.e., an input is set as long as a signal is active.
But in practice it may happen that a signal is only available temporary, but the input shall remain set. For this
case this or several inputs can be set to input trigger. A rising slope with a pulse duration, which is longer than
the response time of the digital filter is sufficient for switching on. Switching off is done with the next rising slo-
pe.
Control release (ST) can be adjusted to input trigger, but this has no effect to the function, since this is a static
signal.
Picture 3.4.7 Example of a signal flow diagram for input (di.05 = 16)
Slope-triggering
Input trigger

3.4.8 Strobe-dependent inputs (di.06, di.07, di.08)

A strobe signal is mainly used for triggering the input signals. For example, two inputs are used for parameter
set selection. The incoming signals to the control are not simultaneously, so that it would be switched into an
unwanted set for a short-time. For active strobe (scanning signal) the actual input signals of the strobe-depen-
dent inputs are stored and have been retained to the next scanning.
Seite 3.4 - 6
Setting range Resolution
0...127 ms 1 ms
COMBIVERT R6-S
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© KEB, 2008-02