1-7
IM 707235-01E
Functions
1
1.4
Setting the Trigger
Trigger Source (Source)
Select the signal for triggering. Select one from the following list of choices:
Internal:
Input signal (includes input signals from 4-CH, 100 kS/s Accelerometer
Modules that are linked)
BUSTRG: Bus signal (BUSTRG1/BUSTRG2) of the WE bus
Trigger Type (Trig Type)
If the trigger source is set to the input signal, select the trigger type from the following list
of choices.
Only High, Low, and Off can be selected in the gate (level) mode.
Rise:
Rising (edge trigger)
Fall:
Falling (edge trigger)
Both:
Both rising and falling (edge trigger)
High:
High level (state trigger)
Low:
Low level (state trigger)
Off:
No trigger
Trigger Level (Trig Level)
The operation varies depending on the item being measured. When measuring
acceleration, set the trigger level in terms of a percentage (+100% to –100%) with
respect to
±
full scale. When measuring voltage, set the trigger level using a voltage
level. The selectable ranges are as follows: 0.1 mV for the
±
50-mV measurement range,
1 mV for the
±
100-mV,
±
250-mV, and
±
500-mV measurement ranges, 10 mV for the
±
1-
V,
±
2.5-V, and
±
5-V measurement ranges, and 100 mV for the
±
10-V,
±
25-V, and
±
50-V
measurement ranges.
Trigger Combination (Combination)
Select one from the following list of choices:
OR trigger
The trigger occurs if any one of the trigger conditions specified for the input signal of
each channel is satisfied.
AND trigger
The trigger occurs when all of the trigger conditions specified for the input signal of each
channel are satisfied.
Pretrigger (valid only during trigger mode)
You can acquire the measured data before the trigger point into the acquisition memory.
Set how many points before the trigger point to begin the acquisition in the range, “0 to
the specified record length – 2.”
Trigger Hold Off (Hold Off) and Overlapped Acquisition
Select the trigger hold off period that is used to temporarily stop the detection of the next
trigger once a trigger occurs. With the factory default setting, the next trigger detection
does not occur until the record length of data is stored in the acquisition memory
(overlapped detection disabled). Therefore, the hold off period is set in the range from
“the record length to 4,194,304.” If the overlapped acquisition is enabled, however, the
hold off period can be set in the range from “2 to 4,194,304.” In some cases, the
measurement stops when the trigger hold off is set to 1/255 of the record length or less.
In this case, set the value above 1/255 of the record length.
Manual Trigger
If you select the trigger mode or the gate mode, triggers can be generated at arbitrary
times. The method used to acquire the data after the trigger is activated varies
depending on the mode. However, this function is not supported on the WE7000 Control
Software. It can be used with the WE Control API (sold separately, model: 707741).