150
After the start of the frequency measurement, CH
Update flag (Measured frequency value) (RX2D, RX45) turns on every
time the measured value is stored in the remote register.
The value previously stored in the remote register is held while CH
Update flag (Measured frequency value) (RX2D, RX45)
is off. (Except at the start of the measurement)
(5) Operation example of the frequency measurement function
The following figure shows an operation example of when CH
Time unit setting (Frequency measurement)
(RWw18, RWw30) is set to 0.01s and CH
Moving average count (Frequency measurement) (RWw19, RWw31)
is set to 3.
10000
T
T
T
T
T
5000
Frequency
0
Time
CH Count enable command
(RY24, RY3C)
CH Time unit setting
(Frequency measurement)
(RWw18, RWw30)
CH Moving average count
(Frequency measurement)
(RWw19, RWw31)
CH Measured frequency value
(RWr1A to RWr1B, RWr32 to RWr33)
CH Update flag reset command
(Measured frequency value)
(RY2C, RY44)
CH Update flag reset completed
(Measured frequency value)
(RX2C, RX44)
CH Frequency measurement flag
(RWr20.b4, RWr38.b4)
CH Update flag (Measured frequency value)
(RX2D, RX45)
3)
2)
1)
5)
0
3
4)
0
6667
7667
6667
T: Frequency measurement time unit
Controlled by the high-speed counter module
Controlled by the program
OFF
OFF
0
OFF
OFF
ON
ON
1
ON
ON
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