Contec ADA16-32/2(PCI)F, Руководство пользователя

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4. Functions
ADA16-32/2(PCI)F
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2. Starting/Stopping Operation/Preset
Starting and stopping the counter and setting the preset values are performed using software commands.
Once the counter has started, it can be stopped at any time by a software command.
The function for setting the preset values can also be called at any time regardless of whether the
counter is running or not.
3. Monitoring the Status and Acquiring Data
Software commands can be used to monitor the device operating status and read counter data. Status
monitoring and data acquisition can both be performed while the counter is running.
Status
The current state of the device can be checked by obtaining the device status.
The following types of device status are available:
- Counter operating
The device operating status is ON from the time the operation start command is executed until
operation stops due to a stop command or error.
- Compare count match
The compare count match status turns ON when a count match occurs after the counter is started.
The status is turned OFF by the status reset command.
- Overrun
The overrun status turns ON if another count match occurs when the compare count match status is
already ON. The status is turned OFF by the status reset command.
Even if the overrun status turns ON, this does not stop the counter.
- Counter operation error
Execution of driver processing may not be able to keep up if multiple count match events occur
within a short time period.
In this case, the counter operation error status turns ON and counter operation stops.
Data acquisition
The current count value can be read using a software command.
4.Reset
Various states can be reset by executing the following reset commands:
Counter reset
Resets the counter. This restores the counter to its state after power on.
Status
Resets the compare count match status and overrun status.