Output Of Trigger Signals - piezosystemjena d-Drive Bedienungsanleitung

The amplitude that has been
selected is the peak to peak value.
The sweep depth is fixed by 1 Hz
to 10 kHz (4 decades). In the
meantime, the
increases logarithmically.
case represents
parameter of the
frequency per decade.
The symmetry of a signal
describes, in the case of the
triangular function, the ratio of
rise time t to time period T.
Based on this, a variation can
be introduced between a fast
increase and a slow decrease
as well as a slow increase and
a fast decrease of the function.
By using the rectangular
function, the duty cycle of high
signal in relation to time of a
period is described.
Caution: Do not activate trigger function in sweep mode (trgedge =0).

8.7 output of trigger signals

Trigger signals allow us to get an electrical signal when a position is reached or crossed. The
trigger points refer to the measured value (stroke or tilt). The trigger is low-active, i.e. a high/low
edge shows that you have reached a trigger point.
The active stroke/tilt-range for trigger generation is given by "trgss" (start (lower) position) and
"trgse" (end (upper) position). The interval between the trigger points is given by "trgsi". It is
possible to get trigger signals at the rising edge (trgedge,1), the falling edge (trgedge,2) or both
edges (trgedge,3).
To disable the trigger generation set trgedge,0. The measurement unit for trgss, trgse, trgsi is the
actuator specific unit (e.g. µm or mrad), the length of a trigger signal can be set to multiples of 20
µs (standard is 1*20 µs).
Take care that is there no overlap between two trigger impulses. If this occurs, you must minimize
the length of the impulses (trglen,1), or decrease the movement speed of the actuator.
Furthermore, you must be sure that the trigger range (between trgss and trgse) passes through
plus 0.2% of the total stroke, otherwise no trigger will be generated because no change between
the rising and falling edges will be detected.
Caution: Do not activate trigger function in sweep mode.
Geschäftsführer: Dr. Bernt Götz • Telefon 03641/66880 • Fax 03641/668866 • www.piezojena.com
f
frequency
This
the "sweep"
increasing
Ampl. triangle function
[%]
100
0
20%
sweep
[Hz]
10000
1000
100
10
1
1Tsw 2Tsw
Dreieckfunktion
t1 t2 T t
z.B. 90 %
3Tsw 4Tsw
Ampl. Rechteckfunktion
rectangle function
[%]
100
0
t1 t2
20%
50 %
t
sweep
[s]
T t
73