Contec CNT-3204MT-LPE, Руководство пользователя

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4. Functions
52
CNT-3204MT-LPE
Hardware event
Types of hardware events
This product includes functions that can operate automatically in response to a change in a control input
signal, control output signal, or counter match. These are called hardware events.
One control input signal line and one control output signal line are provided for each channel.
Table 4.6. Hardware event
Item Purpose Condition
Control input signal *1
Preset
Rise (Low → High)
Fall (High → Low)
Zero-clear
Rise (Low → High)
Fall (High → Low)
Counter start/stop
Rise (Low → High)
Fall (High → Low)
Control output signal *2 Count match (Register 0) Count value = Comparison register 0
Count match (Register 1) Count value = Comparison register 1
Abnormal input error
When phases-A and B are changed at the
same time
Digital filter error
When a pulse faster than the digital filter
setting is input
Count match
Preset
Count value = Comparison register 0
Count value = Comparison register 1
Zero clear
Count value = Comparison register 0
Count value = Comparison register 1
*1 : When the control input signal is used as a general-purpose input, hardware events cannot be
set as above.
*2 : When the above control output signals are set as hardware events, the output consists of a
one-shot pulse output. The pulse width can be set by software to 10µsec, 1msec, 10msec, or
100msec. When using the control output signal as a general-purpose output, the output
becomes a level output and the above hardware events cannot be assigned. The logic polarity
of the output signal can be set by software.