138
●
The sampling counter function cannot be performed while CH
Selected counter function start command (RY25, RY3D)
or CH
Function input terminal (FUNC1, FUNC2) is on even if the other is turned on.
●
By turning off both CH
Selected counter function start command (RY25, RY3D) and CH
Function input terminal
(FUNC1, FUNC2) and then turning on one of them during the operation of the sampling counter function, the pulses are
counted from 0 again though the sampling period is continually measured.
●
Depending on the pulse input speed and sampling period, the values stored in CH
Sampling count value (RWr12 to
RWr13, RWr2A to RWr2B) may be over the upper limit value (2147483647) or below the lower limit value (-2147483648).
In that case, the value stored in CH
Sampling count value (RWr12 to RWr13, RWr2A to RWr2B) remains the upper limit
value (2147483647) or the lower limit value (-2147483648), and CH
Overflow/underflow error (Sampling count
value/Periodic pulse count, difference value) (error code:
050
H
) occurs. Despite this minor error, the sampling counter
function keeps working till the end of the sampling period.
●
To perform the sampling counter function again, reset CH
Update flag (Sampling count value) (RX29, RX41) before
turning on again CH
Selected counter function start command (RY25, RY3D) or CH
Function input terminal (FUNC1,
FUNC2). If it is not reset, whether its value was updated after the re-execution cannot be checked.
No.
Description
1)
Counting the input pulses starts from 0 at the rising edge of CH
Selected counter function start command (RY25, RY3D) or CH
Function input terminal (FUNC1, FUNC2).
For CH
Selected counter function start command (RY25, RY3D), CH
Counter function detection (RX25, RX3D) turns on or off
by turning on or off CH
Selected counter function start command (RY25, RY3D).
2)
Counting stops at the end of the preset sampling period.
3)
While the sampling counter function is being performed, set CH
Sampling counter/Periodic pulse counter operation flag
(RWr20.b3, RWr38.b3) to Operating (1).
4)
At the end of each sampling period, CH
Update flag (Sampling count value) (RX29, RX41) turns on.
5)
Even after the counting is completed, the values stored in CH
Sampling count value (RWr12 to RWr13, RWr2A to RWr2B) remain
the same until CH
Selected counter function start command (RY25, RY3D) or CH
Function input terminal (FUNC1, FUNC2) is
turned on again. When CH
Selected counter function start command (RY25, RY3D) or CH
Function input terminal (FUNC1,
FUNC2) is turned on again, 0 is stored in CH
Sampling count value (RWr12 to RWr13, RWr2A to RWr2B) and the counting
resumes.
6)
When CH
Update flag reset command (Sampling count value) (RY28, RY40) is turned on, the high-speed counter module turns
off CH
Update flag (Sampling count value) (RX29, RX41) and turns on CH
Update flag reset completed (Sampling count value)
(RX28, RX40).
After that, CH
Update flag reset completed (Sampling count value) (RX28, RX40) turns off when CH
Update flag reset
command (Sampling count value) (RY28, RY40) is turned off.
7)
Although the sampling counter function operates regardless of the ON/OFF status of CH
Count enable command (RY24, RY3C),
CH
Sampling count value (RWr12 to RWr13, RWr2A to RWr2B) is not counted while CH
Count enable command (RY24, RY3C)
is off. At the end of the sampling period after CH
Count enable command (RY24, RY3C) is turned off, CH
Sampling
counter/Periodic pulse counter operation flag (RWr20.b3, RWr38.b3) is set to Not operating (0) and CH
Update flag (Sampling
count value) (RX29, RX41) turns on.
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