55
If is ;
7.8.1 FREQUENCYMETER / TACHOMETER Applications Examples
Measuring starts on rising edge of Ch-A input. Time (T) is between two rising edge.
Ch-A
Value on the Screen = f = 1 / T
T
For dm/sec, point position for display parameter must be
For m/sec, point position for display parameter must be
Ch-A
EXAMPLE-1 :
There is a cloth workbench as shown below:
When parameter is , parameter is , cloth is advanced
80 cm per revolution and 20 cycle / sec is observed on the display.
User can observe cloth length , 80 cm, on the display by changing the and
Parameter
= Cloth Length in one revolution
* Value on the display ( f )
If = 1
Multiplication coefficient = 80/20 = 4
After adjustment of the parameter, 80 cm / sec is observed
on the display.
For cm / minute, parameter must be
For cm / hour, parameter must be
This method must be used if speed is over 100 cycle / second
For measuring the speed cycle per minute, parameter must be
For measuring the speed cycle per hour, parameter must be
If parameter is , parameter is , then speed is
measured cycle per second.
Method -1 :
Two different method are used in Frequencymeter / Tachometer function;
Method -1 :
To get frequency or cycle value by measuring the revolution time
(This method is used if the sensor sends one pulse per revolution)
Method -2 :
To get frequency or cycle value by counting the pulses during the time is set in
parameter
i
