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1.2 Features
(1) Offering counting capability over the wide range from -2147483648 to
2147483647
• The module stores a count value in 32-bit signed binary.
• The number of channels is two.
(2) Switching the maximum counting speed
For the LD62D, 500k/200k/100k/10k can be switched and for the LD62, 200k/100k/10k can be switched, thereby
achieving an error-free count even if a pulse has a gradual rising/falling edge.
(3) Allowing selection of pulse input
The pulse input mode can be selected from the following: 1-phase multiple of 1, 1-phase multiple of 2, 2-phase
multiple of 1, 2-phase multiple of 2, 2-phase multiple of 4, and CW/CCW.
(4) Allowing selection of counter types
Either one of the following counter types can be selected.
(a) Linear counter type
This type is capable of counting pulses ranging from -2147483648 to 2147483647 and detects an overflow if
this range is exceeded.
(b) Ring counter type
This type counts pulses repeatedly under the range of the ring counter upper limit value and the ring counter
lower limit value.
(5) Permitting coincidence output
Outputting on/off signals or initiating an interrupt program is possible at the timing when a coincidence output
point, which is set arbitrarily beforehand, matches the current value in comparison with each other.
(6) Allowing selection from the four counter functions
One of the following functions can be selected for use.
(a) Count disable function
This function makes the pulse count stop by inputting a signal while CH Count enable command (Y4, YC) is
on.
(b) Latch counter function
This function latches the current value of a counter at the time of input of a signal.
(c) Sampling counter function
Of input signals, this function counts pulses that are input during a time specified beforehand.
(d) Periodic pulse counter function
While signals are input, this function stores the current value and previous value of a counter at each pre-
specified period.