Mitsubishi NZ2GFCF-D62PD2 User Manual page 152

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.
Controlled by the high-speed counter module
Controlled by the program
CH
CH
(RWr1A to RWr1B, RWr32 to RWr33)
CH Frequency measurement flag
CH Update flag (Measured frequency value)
CH
CH
150
Count enable command
(RY24, RY3C)
CH Time unit setting
(Frequency measurement)
(RWw18, RWw30)
CH Moving average count
(Frequency measurement)
(RWw19, RWw31)
Frequency
Measured frequency value
(RWr20.b4, RWr38.b4)
(RX2D, RX45)
Update flag reset command
(Measured frequency value)
(RY2C, RY44)
Update flag reset completed
(Measured frequency value)
(RX2C, RX44)
ON
1)
OFF
10000
5000
T T T
0
0
1
0
OFF
OFF
OFF
T: Frequency measurement time unit
5)
0
3
T T
Time
6667 7667 6667
ON
2) 4)
ON
3)
ON