JPS3
P. / 5
EM-575 Rev.
EXPLANATIONS OF TERMS & FUNCTIONS
■
SCALING FACTOR, INPUT PULSE SET COUNT & OUT-
PUT PULSE SET COUNT
The scaling factor, rate of number of output pulses divided
by number of input pulses, is determined by two param-
eters: input pulse set count and output pulse set count.
The JPS3 output is designed to be proportional in number
of pulses relative to the input. For example, when the pulse
rate is set to 0.0583, the JPS3, provided with 10000 input
pulses (input 1 and 2 added), outputs 583 pulses. However,
the output is not supplied in a constant frequency. The JPS3
counts the number of input pulses during the sampling time
(period) and stores it in the internal buffer counter, and pro-
vides the number of output pulses multiplied by the scaling
factor for the number of input pulses, by the end of next
sampling cycle. With the maximum output frequency limit,
those pulses exceeding the limit are still in the buffer and
output only in the following cycle.
■
SAMPLING TIME
The sampling time is defined as a time period required by
the JPS3 to count the input signals for one cycle. With its
factory default setting (0.1 sec.), the output is refreshed
every 100 milliseconds.
This setting is not usually be changed unless for a specific
purpose.
■
MAXIMUM OUTPUT FREQUENCY LIMIT
You can limit the maximum output frequency from the
JPS3.
The JPS3 multiplies the number of input pulses by the scal-
ing factor. However when the output pulses are supplied to
a low-speed response counter, the number of output pulses
(output frequency of the JPS3) may have to be limited with-
in a certain level.
Those surplus pulses remains in the buffer and are output
in the following sampling cycles within the limit.
OUTPUT LOGIC
H
L
Voltage Pulse
or
RS-422
Line Driver Pulse
OUTPUT WAVEFORM
Open collector
or
Noncontact
AC/DC Switch
The pulse width in one-shot means the bold lined section of a pulse waveform.
*
As specified by the model number suffix code.
No pulse width conversion
One-shot, detecting input pulse rise
Non
Inverted
Voltage Pulse
2-wire Current Pulse
Open Collector or
Mechanical Contact
INPUT 1 & 2 WAVEFORM
H
H
L
H
H
L
L
H
L
OFF
ON
L
L
H
One-shot, detecting input pulse drop
H
L
No pulse width conversion
One-shot, detecting input pulse rise
Inverted
H
H
L
H
H
L
L
L
L
H
One-shot, detecting input pulse drop
OFF
ON
No pulse width conversion
One-shot, detecting input pulse rise
Non
Inverted
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
One-shot, detecting input pulse drop
No pulse width conversion
One-shot, detecting input pulse rise
Inverted
One-shot, detecting input pulse drop
*
*
*
*
