Hengstler Signo 721.2 Benutzerhandbuch Seite 120

5 Describtion of the counter
Static/dynamic Reset:
Decimal point:
Input damping
(Attenuation)
or
2.) Set: reset to P 2
Signal 2 at 0
During unidirectional counting the counter will subtract
Static Reset:
Dynamic Reset:
The decimal point is only an optical reading aid on the display and does not change the
value. For example, for a value of 1 pulse per cm, the setting 0,00 makes it easier to read the
value in m and cm.
The inputs A and B are damped to 60 kHz.
Following maximum input frequencies are not to be exceeded:
Phasediscriminator single evaluation: A and B each 30 kHz (TTL 20 kHz)
Phasediscriminator double evaluation: A and B each 30 kHz (TTL 20 kHz)
Phasediscriminator quadruple evaluation: A and B each 15 kHz (TTL 20 kHz)
Unidirectional counting and directional input: Input A 60 kHz (TTL 20 kHz)
Differential counting, summation (totalizing): Input A + B 60 kHz in total (TTL 20 kHz)
If mechanical contacts are triggered (i.e. relays, switches, Reed contacts, etc.), the input
frequency has to be damped (attenuated) to 30 Hz, so as to filter out bounce pulses.
If damping to 30 Hz is selected, all inputs can be used with 30 Hz.
Reset over the entire pulse width of the reset pulse
Reset via the active edge; thereafter, counter operation is
possible independently of the pulse width of the reset pulse.
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