Hardware manual

Impact Reference Guide Camera
2-23 Datalogic Automation Inc.
This mode’s operation is the same as Continuous while Frame Trigger High mode, except that the frame
trigger polarity is reversed.
Continuous while Online
In this mode, the frame trigger signal is not used. Scan Lines are acquired as long as the camera is online.
Hardware line triggers must be provided on the camera’s Line Trigger input. When the current image fills
with scan lines, image acquisition is complete and the next image starts with the next line trigger.
The camera will wait as long as necessary to get enough scan lines to fill each image. Since there is nothing
to indicate the end of the scan, the last image can wait forever to fill. To flush a partial last image out of the
camera and start a new one, the camera must be put Offline. If the camera is not put Offline, when a new
image is started the first lines of the new image will contain the left over lines from the end of the previous
image.
Dalsa Acquisition Modes
Dalsa cameras support four frame trigger modes: Single Frame Edge Triggered, Continuous While Frame
Trigger High, Continuous While Frame Trigger Low, and Continuous While Online.
In the Continuous While Frame Trigger High and Continuous While Frame Trigger Low modes, the Dalsa
camera acquires images of the normal image height while the frame trigger is active. These cameras have a
maximum image height of 16,383 lines.
The Top Edge value is always 1 and the Bottom Edge is the number of lines to acquire. You can adjust the
maximum image height and width in VPM in Settings - Camera - Partial Scan tab.
When the frame trigger goes inactive, the camera immediately sends the current image to the vision program
with the number of lines that have been acquired. It is up to the vision program to discard or attempt to pro-
cess the partial height image. The height of the current image can be accessed programmatically in the
image’s Height property in VPM.
The M5xx cameras do not work this way. The M5xx cameras pause acquisition when the frame trigger is
inactive and then continue acquisition when the frame trigger goes active again, so that all images are the
full height. The top of the image does not necessarily correspond to the beginning of the frame trigger.
Line Trigger Type
M5XX Camera
Single Phase
The trigger signal is connected to Input 2 and the line start is triggered on the rising edge of the signal only.
There are no debounce settings for Input 2.
Quadrature Forward Only
Use this setting with a quadrature encoder. Phase A is connected to Input 2 and Phase B is connected to
Input 3. The line start is triggered on the rising and falling edge of each input as long as Phase A leads Phase
B (forward direction). There are no debounce settings for Input 2 and 3.
The camera does not start a line in the backward direction. It counts the trigger pulses until the encoder goes
forward again, then it counts the forward pulses until all the backward pulses have been retraced, then it
starts triggering. This setting allows the line start to ignore backward jitters.
Quadrature Forward and Back
Use this setting with a quadrature encoder.Phase A is connected to Input 2 and Phase B is connected to Input
3. Line starts are triggered on the rising and falling edge of each input in either direction.
Dalsa Scan Direction