YOKOGAWA FX103 User Manual

4-14 IM 04L20A01-01E
Application Example 2: Number of Pulses per Second
Calculates number of pulses per second using pulses input through the terminal 6 on
the FX103 (scan interval: 250 ms).
Time
(Moving avarege over a second)
Ch 31
Number of pulses
per scan interval
Ch 32
Number of pulses
per second
Pulse input
Scan interval (250 ms)
(4 times)
• Computation equation
Assigne computation channels as follows. Set computation equations for each
channel. Upper/lower limit of span is set according to the application.
Note
In a single measurement interval, calculation is performed on numbered channels in the order
from smallest to largest. For channels that calculate the number of pulses per second, use
higher-numbered channels than those of the channels that count the number of pulses at
each scan interval.
Channel Equation Description
31 D6 Counts the number of pulses every scan interval.
32 31*K01 Number of pulses per second
Constant Description
K01 Counts the number of pulses every scan interval.
• Channel 31
Equation: D6
Counts the number of pulses every scan interval (250 ms).
Rolling average
Takes the moving average over a period of 1 second. This value multiplied by 4 (=1
s/250 ms) counts the number of pulses per second.
• Interval: 250 ms
• Number of samples: 4
• Channel 32
Equation: 31 * K01
The value of channel 31 is multiplied times 4, and the number of pulses per second is
calculated.
Constant
K01: 4
Note
When displaying the number of pulses per minute, the rolling average on channel 31 is set as
follows, and channel 32 is set to 240 times that of the value of channel 31 (K01=240).
• Interval: 250 ms
• Number of samples: 240
4.3 Setting Pulse Input (/PM1 Option)

YOKOGAWA FX103 Specifications

General

Brand	YOKOGAWA
Model	FX103
Category	Controller
Language	English