6M18 Camera User’s Manual
32
DALSA
03-32-10017-03
When the camera is in External Trigger Mode, the Frame LED will be illuminated on the camera
back to indicate the camera is expecting a signal on the SMA connector or serial bit [0] of register
1.
Because this signal is internally OR’ed with the TRIGGER IN Sync input, care must be taken to
ensure the TRIGGER IN signal is equal to a logic 0 while in Serial Trigger mode.
3.14 Controlling Frame Rate
The 6M18 allows you to control frame rate in three ways.
•
Free Running:
(default) The camera free runs with the internally programmed integration
time.
•
External Trigger/Internal Integration:
The camera frame rate will be controlled by the
TTL pulse on the TRIGGER IN SMA connector. The camera will integrate for the
programmed integration time. (
Reference section 3.13 Controlling Integration Mode
)
•
External Integration:
The camera frame rate will be controlled by the TTL pulse on the
TRIGGER IN SMA connector. The camera will integrate fas long as the pulse is held high. In
this mode, TRIGGER IN also controls integration. (
Reference section 3.13 Controlling
Integration Mode
)
Free Running
This mode is the camera’s default. The camera will operate at the maximum frame rate for the
programmed integration time. Reference section 3.13 – Controlling Integration.
External Trigger/Programmed Integration
This is the same as External Integrate/SMA Trigger Mode. Reference to section 3.13 Controlling
Integration Mode.
Example: Set the Frame Rate to 2.5 fps
1 . Reference section 3.12 Triggering, Integration, and Frame Rate Overview to ensure the desired
frame rate can be supported for the selected binning and integration modes.
2.
Using the command 81h, set bit [0] of the data byte to 0 (Integration Mode = Internal) and bit
[3] of the data byte to 1 (Trigger Mode = External).
NOTE: All bits within the register are written at one time. Ensure the correct value for all
bits are used when changing camera modes.
3
Set the desired integration time per section 3.13 – Controlling Integration.
4
Each TTL rising edge on the SMA connector will initiate a new frame of data, using the
programmed integration time. To achieve 2.5 fps, a TTL pulse must be sent to the camera
every 400 ms (1/2.5).
External Trigger/Serial Connector
This is the same as External Integrate/External Trigger Mode. Refer to section 3.13 Controlling
Integration Mode.
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