9
english
1. Description
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6-digit adding/subtracting counter with two presets
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Very bright 8mm high LED display
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Counting and preset range from –199999 to 999999.
Overshoots and undershoots up to one decade
without loss of pulses. In this case, the display
blinks at a 1 Hz frequency.
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Indication of the active outputs and display of the
preset by means of LED’s
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Programmable as a pulse counter, a frequency
meter/speed indicator or a time counter/operating
time counter
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Relay or optocoupler outputs
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Programming of the functions and of the operating
parameters by means of the push buttons. Operator
guidance by the display while programming
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Can be programmed:
Operating mode (output signal at 0 or at the preset
value, with or without automatic repetition)
Reset by means of push-button or Reset input
Polarity of the inputs (npn or pnp)
Input mode and scale factor
Decimal point
Output signals in the shape of a positive or negati-
ve, timed or continuous signal
Frequency meter/speed indicator display in 1/s or 1/
min
Time counter/operating time counter resolution in s,
min, h or h:min:s, 1, 0.1, 0.01 or 0.001
Start and stop with the time counter/operating time
counter
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Supply voltage
90..250 VAC
10..30 VDC
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Optional serial interface
RS232 or
RS422 or
RS485
2. Inputs
2.1 INP A, INP B
Counting inputs. Their function depends on the selected
input mode. The maximum counting frequency of 20 kHz
can be reduced to 30 Hz by programming.
2.2 GATE
Static gate input. Function depending on the
programmed operating mode.
Pulse counter mode:
No counting if the input is ON.
Time counter mode:
Counting programmable for input ON (gate.lo) or OFF
(gate.hi). The decimal point of the lowest decade blinks
to indicate that the counting is running.
2.3 RESET
Dynamic reset input. Resets the counter to zero when
counting up, and sets it to the preselected value when
counting down. The reset input can be inhibited in the
Setup.
2.4 KEY
Static key locking input. The presets cannot be modified
as long as this input is ON. It is however still possible
to switch the display between the counting value and
the presets.
3. Outputs
3.1 Output 1
Potential-free opening or closing relay, or optocoupler
with open emitter and collector.
3.2 Output 2
Potential-free change-over relay or optocoupler with
open emitter and collector.
3.3 Active outputs
The active output is indicated by a status LED. The
outputs can be reversed in case of safety circuits, i. e.
voltage to the relay coils is cut off or the optocouplers
block when the preset values are reached.
Caution:
In all modes with automatic repetition (AddAr, SubAr)
the duration of the pulse is to be programmed for the
timed signal of output 2, otherwise this signal will have
no defined duration.
Operating instructions
Electronic preset counter
Type series 717
5.98.3_gb
