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Basic Hardware and Function
275
8. Special I/O Functions
8.3.2 Single phase speed-counter
Function
This function counts the number of changes of the count input from OFF to ON during the
every specified sampling time. The count value in a sampling time is stored in the hold
value register.
This counter operation is enabled while the soft-gate is ON. When the soft-gate is OFF,
the hold value is cleared to 0.
The setting range of the sampling time is 10 to 1000 ms (10 ms units).
The count value range is H0000 to HFFFF (16-bit).
Hardware condition
Count input (X000 and X001)
ON/OFF pulse width: 100 ms or more (max. 5 kHz)
Related registers
SW16: Function selection. Refer to section 8.1.
Function Re
g
ister/device Remarks
Channel 1 Channel 2
Count input X000 X001 (Note 2)
Samplin
g
time SW18 SW20 Data ran
g
e: 1 to 100 (Note 1)
Hold value SW22 SW23 Data ran
g
e: H0000 to HFFFF
Soft-
g
ate S240 S248 Operation is enabled when ON
Note 1) The setting data range of the sampling time is 1 to 100. (10 ms multiplier)
Note 2) When both channels are used, X000 and X001 cannot be used as normal
input devices. However, if either one channel is used, the input for unused
channel can be used as normal input devices.
Interrupt assignment
No interrupt function.
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