Contec CNT-3204MT-LPE, Руководство пользователя

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4. Functions
54
CNT-3204MT-LPE
Control output signal
One control output signal is provided for each channel. Each output signal can be used as a general-
purpose output (level output) or as a one-shot pulse output for sending notification of hardware events
to an external device.
Although all hardware events can be set to trigger a one-shot pulse output, in this case there is no way to
determine which event caused the one-shot pulse to be output and therefore the status needs to be
checked or similar.
The output polarity is set by software.
Table 4.8. Control output signal
Item Purpose Condition Note
Control
output signal General-purpose output Software command Level output
(Positive logic/Negative
logic)
Count match (Register 0) Count value =
Comparison register 0
A one shot pulse is
outputted. (Positive
logic/Negative logic) *
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
* The one-shot pulse width is set by software to 10 µsec, 100 µsec, 1 msec, 10 msec, or 100 msec.
General-purpose output
When not used as a hardware event, the control output pin can be used as a general-purpose output. In
this case, the output becomes a level output rather than a one-shot pulse output. The logic polarity can
be switched between positive and negative.
Count match (Register 0)
A one-shot pulse is output to indicate a count match (register 0) output when the count matches the
value set in compare register 0. The logic polarity can be switched between positive and negative.
Count match (Register 1)
A one-shot pulse is output to indicate a count match (register 1) output when the count matches the
value set in compare register 1. The logic polarity can be switched between positive and negative.
Abnormal input error
A one-shot pulse is output to indicate an abnormal input error when the A and B phases change
simultaneously. The logic polarity can be switched between positive and negative.
Digital filter error
A one-shot pulse is output to indicate a digital filter error if a pulse faster than the digital filter time
setting is input. The logic polarity can be switched between positive and negative.