Spider DSA User’s Manual
155
recording will stop after the duration expires and immediately start another
recording for the same duration. This will repeat until the user or system stops it.
For example, if the record duration is set to 30 seconds, when the recording
initially starts, after 150 seconds, there will be 5 recorded time data files, and each
of them has 30-second data.
For an existing recording, which was not started by the limit exceeded event, such
an event can be set to stop recording by checking “when limit exceeded” under the
stop recording event as shown in the figure above.
Recording with Digital input
Recording can automatically start and stop when digital input is detected by the
Spider which has up to 8 digital input pins. The Spider-81 series products have
fixed the pin number for receiving digital input while the Spider-80X has 8
movable digital input pins. When EDM software is connected with the Spider, the
available digital input pins will be displayed when “digital input” option as shown
below is checked.
Digital input will be defined as a high (3.3 V) voltage. Once the high voltage is
detected by Spider, it can start or stop recording as defined in the figure above.
Therefore, the valid digital input can be either the High-Low-High pulse, Low-
High-Low pulse, High-Low pulse, or Low-high pulse. Without the defined record
duration, the recording will last until it is stopped by a stop recording event such
as another digital input, stop recording button, limit exceeded event, or the test
stopped.
The start recording and the stop recording event can be configured to associate
with either the same digital input pin or the different pins. When the same digital
input pin is selected for both start and stop recording events, the first digital input
will start recording if currently the recording is not started yet, or the first digital
input will stop recording if currently the recording is in progress. Then the second
digital input from the same pin will flip the current recording status.
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