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73VR31BLD USERS MANUAL EM-7397-C Rev.4
EVENT RECORDING
In the event recording mode, the 73VR3100 detects an external event by trigger signal, and stores preset number of
samples (max. 1200 respectively) before and after the moment of event.
With an analog trigger, the trigger signal is continuously compared with a preset threshold, and the 73VR3100 initi-
ates recording when it is in a pre-determined condition (higher or lower than the threshold).
With a discrete trigger, the signal logic state is continuously monitored, and the 73VR3100 initiates recording when
it is turned to a pre-determined state (ON or OFF).
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Trigger Conditions for Analog
Value > Threshold
Data recording is initiated when the trigger input signal value
goes above the threshold setpoint.
Value < Threshold
Data recording is initiated when the trigger input signal value
goes below the threshold setpoint.
Value ≥ Threshold
Data recording is initiated when the trigger input signal
values is equal to or goes above the threshold setpoint.
Value ≤ Threshold
Data recording is initiated when the trigger input signal
values is equal to or goes below the threshold setpoint.
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Trigger Conditions for Discrete
Up
Rising pulse edge
Data recording is initiated at a rising edge of the trigger input
pulse.
Down
Sinking pulse edge
Data recording is initiated at a sinking edge of the trigger
input pulse.
How to Set the Event Recording
Figure 2.3.2b. Event recording setting, analog.
Figure 2.3.2c. Event recording setting, discrete.
1. Storing setting: Pull down the arrow to the right of Storing Field and select Event recording. Choosing the Event
recording on the Data storing method view changes the subsequent menu items to those suitable for the event
recording mode.
2. Discrete / Analog: Choose a type of trigger signal.
Discrete
Contact signal trigger
A discrete signal triggers recording.
Analog
Analog signal trigger
An analog signal triggers recording.
3. Threshold: For analog signals, set a threshold in an engineering unit value.
Threshold
Engineering unit value. Max. 6 digits including decimal
point and minus (–) sign. ‘e’ is used to set an exponential
value.
4. Condition: Choose among the aforementioned options.
5. Pen number: Choose a pen to be designated as trigger.
6. Pretrigger / Posttrigger: Specify numbers of samples to be stored before (Pretrigger) and after (Posttrigger) the
event respectively.
Pretrigger
Number of pretrigger
Max. 1200 samples. Pretrigger recording is NOT applicable
samples
with the storing intervals set to 2 seconds or longer.
Posttrigger
Number of posttrigger
Max. 1200 samples.
samples
