Single Phase Up-Counter - Toshiba PROSEC T1 User Manual

8.3 High speed counter
8.3.1

Single phase up-counter

Function
When the count input is changed from OFF to ON, the count value is increased by 1.
When the count value reaches the set value, the count value is reset to 0, and I/O
interrupt program is activated (if the interrupt enable flag is ON). The count value is reset
to 0 when the reset input comes ON.
This counter operation is enabled while the soft-gate is ON. The count value is reset to 0
when the soft-gate is changed from ON to OFF.
The set value is set internally at the timing of the soft-gate changing from OFF to ON.
When the soft-gate is OFF, the count value can be changed by writing the data into the
set value register and setting the count preset flag to ON.
The count value range is H0000 to HFFFF (16-bit data).
Hardware condition
Count input (X000 and X001)
ON/OFF pulse width: 100 ms or more (max. 5 kHz)
Reset input (X002 and X003)
ON/OFF duration:
Related registers
SW16: Function selection. Refer to section 8.1.
Count input
Reset input
Set value
Count value
Soft-gate
Interrupt enable
Count preset
Note) When both channels are used, X000 to X003 cannot be used as normal
Interrupt assignment
Channel 1 ¼ I/O interrupt program #1
Channel 2 ¼ I/O interrupt program #2
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2 ms or more
Function Register/device
Channel 1
X000
X002
SW18
SW22
S240
S241
S243
input devices. However, if either one channel is used, these inputs for unused
channel can be used as normal input devices.
8. Special I/O Functions
Channel 2
X001 (Note)
X003
SW20 Data range: H0000 to HFFFF
SW23
S248 Operation is enabled when ON
S249 Interrupt is enabled when ON
S24B Used to preset the counter value
Basic Hardware and Function
Remarks
273