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Chapter 5 Programming Concepts
XBC E-Type Main Unit
5-23
Ver. 1
ii. When the reset input is turned On, the current value is cleared as 0.
d. Ring counter
i. The current value is increased with the rising edge of the counter input signal,
and the counter output contact (Cxxx) is turned on when the current value
reaches the preset value. Then the current value and counter output contact
(Cxxx) is cleared as 0 when the next rising edge of the counter input signal is
applied.
ii. When the reset input is turned On, the counter output contact is cleared as 0.
2. Maximum counting speed
1
The maximum counting speed is determined by the length of scan time. Counting is possible
only when the on/off switching time (duty cycle) of the counter input signal is longer than scan
time.
Duty is the ratio of the input signal’s on time to off time as a percentage.
Remark
1) Use of High Speed Counter Functionality
In order to counter pulse that is faster than maximum counting speed of normal counter, use
built-in High Speed counter function.
On
f
f
O
f
f
O
T1
T2
T1
T2,
n =
x 100 [%]
T1 > T2,
n =
x 100 [%]
T2
T1+T2
Maximum counting speed
n : duty (%)
: scan time [s]
Summary of Contents for XBC-DN10E
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