Mitsubishi Electric MELSEC-L02SCPU User Manual page 182

(3) Function list
The following table lists and describes available functions of the high-speed counter function.
Item
Linear counter function
Ring counter function
Preset function
Coincidence Preset function at
output function coincidence output
Coincidence detection
interrupt function
Latch counter function
Latch counter function
Count disable function
Counter
function
selection Sampling counter function
Count disable/preset
function
Latch counter/preset
function
Internal clock function
Frequency measurement function
Rotation speed measurement function
Pulse measurement function
PWM output function
180
Counts pulses within the range of -2147483648
to 2147483647, and detects an overflow or an
underflow if the count range is exceeded.
Repeatedly counts pulses within the range of
the upper limit value to the lower limit value of
ring counter.
Overwrites CH1 Current value (SD1880,
SD1881) with a set value in the counter.
Compares a set value with CH1 Current value

(SD1880, SD1881) in the counter and outputs
on or off signal.
Overwrites CH1 Current value (SD1880,
SD1881) with a set value in the counter on the
rising edge of Counter value coincidence (No.n)
signal.
Initiates an interrupt program when CH1
Current value (SD1880, SD1881) and a set
value match.
Latches CH1 Current value (SD1880, SD1881)
of the counter on the rising edge of Latch
counter input signal.
Latches CH1 Current value (SD1880, SD1881)
of the counter on the rising edge of CH1
Selected counter function start command
(SM1896) or Function input signal.
Stops counting while CH1 Count enable
command (SM1895) is on.
Counts pulses that are input during a specified
sampling period.
Performs the count disable function and the
preset function without switching the function.
Performs the latch counter function and the
preset function without switching the function.
Counts clock frequencies generated by the
LCPU.
Counts pulses input from the pulse input signals
of phases A and B and automatically calculates
frequencies.
Counts pulses input from the pulse input signals
of phases A and B and automatically calculates
frequencies.
Measures the on or off width of pulses that are
input to Function input signal.
Outputs PWM waveforms from Coincidence
output No.1 signal at the maximum of 200kHz.
Description
Operation mode
where the function Reference
can be used
Page 199, Section
8.4 (1)
Page 199, Section
8.4 (1)
Page 203, Section
8.4.1 (2)
Page 205, Section
Page 207, Section
8.4.2 (1)
Page 208, Section
Normal mode
Page 213, Section
8.4.4 (2) (a)
Page 213, Section
8.4.4 (2) (a)
Page 215, Section
8.4.4 (2) (c)
Page 217, Section
8.4.4 (2) (d)
Page 219, Section
8.4.4 (2) (e)
Page 194, Section
8.3.1 (2) (a)
Frequency Page 224, Section
measurement mode 8.5 (5)
Rotation speed Page 230, Section
measurement mode 8.6 (5)
Pulse measurement Page 234, Section
mode 8.7 (2)
Page 237, Section
PWM output mode
8.8 (2)
8.4.2
8.4.3