Toshiba 6F3B0253 user manual Single phase speed-counter

6F3B0253

8. Special I/O Functions

8.3.2Single 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 1000ms (10ms units). The count value range is H0000 to HFFFF (16-bit).

Hardware condition

Count input (X000 and X001)

ON/OFF pulse width: 100∝ s or more (max. 5KHz)

Related registers

SW16: Function selection. Refer to section 8.1.

Function	Register/device		Remarks
	Channel 1	Channel 2
Count input	X000	X001	(Note 2)
Sampling time	SW18	SW20	Data range: 1 to 100 (Note 1)
Hold value	SW22	SW23	Data range: H0000 to HFFFF
Soft-gate	S240	S248	Operation is enabled when ON

Note 1) The setting data range of the sampling time is 1 to 100. (10ms 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.

Basic Hardware and Function 263