HEIDENHAIN iTNC 530 Service Manual page 104

Trigger
Trigger threshold
Edge
The setting of the pre-trigger defines the duration of the recording after the trigger threshold is
Pre-trigger
reached.
10 – 104
Note
The oscillogram remains stored until you start a new recording.
Set the trigger:
Free run
The recording is started and ended by soft key. When you press the STOP soft key, the last
4096 points are saved.
Single shot
If you press the START soft key, the next 4096 points are stored.
Channel 1 to channel 6:
Recording begins when the triggering threshold of the selected channel is exceeded.
Enter the trigger threshold
Note
The height of the threshold depends on the expected signal amplitude.
The units of measure result from the signal type.
For the PLC signals M, I, O, enter a threshold of 1 or 0.
Define whether recording will be triggered with the rising (positive) or falling (negative) edge.
Pre-trigger = 0%:
4096 grid points are recorded beginning from the fulfilled trigger condition.
The trigger threshold reached first is on the left edge of the record (position of cursor 1).
Pre-trigger = 25% (or 50% or 75%)
75% (or 50% or 25%) of the 4096 grid points beginning from the fulfilled trigger condition are
recorded.
The trigger threshold reached first is at 25%, in the middle or at 75% of the record (position
of cursor 1).
Pre-trigger = 100%:
Recording is stopped. The last 4096 grid points before the fulfilled trigger condition are saved.
The trigger threshold reached first is on the right edge of the record (position of cursor 1).
Note
If the trigger condition is fulfilled before the corresponding number of grid points has been
stored in case the pre-trigger is set to 25, 50, 75 or 100%, then correspondingly fewer grid
points are recorded.
HEIDENHAIN Service Manual iTNC 530