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Parameter
Frequency Control
Input Filter
Channel A Setting
Sampling Time A
Wait Time A
Filter A
Reset Value A
*) This Parameter is
only relevant when
remarkable Sampling
Times are used. It
determines the way
how the unit responds
to gaps within one
sampling period.
Fu252_02g_oi_e.doc / Apr-16
www.hohner-elektrotechnik.de
Description
Frequency control and response characteristics to frequency gaps for
channels A and B. This setting is taken as a 4 bit binary value.
Range 00 – 15, default setting 10 (only to be changed in special case)*
Programmable hardware filter for the impulse inputs
0 = no filtering
1 – 3 : filter low – medium - high
Time base for measuring the frequency on input A
Range 0 – 9,999 seconds
Setting 0 provides a sampling time of 750 µs
Zero setting time for missing frequency on input A.
Range 0.01 – 9.99 seconds
The Analog signal goes to zero when no input impulse appears during
the Wait Time.
Example:
With setting 0,01 s all frequencies <100 Hz will produce zero output
Digital filter for smoothing the Analog output with unstable frequencies
on input A.
00 = Filter off (immediate response to changes of the input signal)
01 = Filter with time constant 1.563 ms
02 = Filter with time constant 3.125 ms
03 = Filter with time constant 6.250 ms etc.
07 = Filter with time constant 100 ms (slow response)
Please note:
These time constants are valid for sampling time settings of 1 ms. and higher
sampling times will correspondingly increase the time constant
Range -1 100 000,0 to +1 100 000,0
Input A will be overwritten by this simulated frequency value, if the
control input is active and the "Reset A" function has been assigned to
the control input.
Sampling Time
Input A
: Bit0 = 1, Bit1 = 0.
Input B
Input A
: Bit0 = 0, Bit1 = 1.
Input B
: Bit2 = 1, Bit 3 = 0
: Bit2 = 0, Bit 3 = 1
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