129506 2012-12
18
KFU8-DW-1.D
Operation
The signal frequency calculated from the cycle duration is mul-
tiplied by 60 and displayed in rpm. Specify the hysteresis limits
of the switching point in rpm.
Pulse divider
(factory preset: 1 pulse/revolution)
Applications involving slow processes are frequently equipped with
sensors which provide several pulses per revolution. In the rotational
speed measuring function, the device undertakes the conversion to
the actual value of rpm by inputting the numerical value (of
pulses/revolution), i.e. both the indication and the input of the
hysteresis limits are obtained from the actual rate of rotation of the
drive.
Example:
In normal operation, a machine rotates at 450 rpm. An incremental
rotary encoder providing 10 pulses per revolution is used as the rate
of rotation sensing element.
The input frequency is:
A rate of rotation of
450 rpm x 10 pulses/revolution = 4500 rpmwould be displayed in the
rotational speed measuring function.
450 rpm x 10 pulses/revolution
60 s/min
= 75 Hz