VC-5MC-M/C110H User's Manual
Page 44 of 109
8.3.4
Using an External Trigger Signal
If the
Trigger Mode
parameter is set to
On
and the
Trigger Source
parameter is set to
Line0
, an
externally generated electrical signal injected into the Control I/O receptacle will act as the
exposure start trigger signal for the camera. This type of trigger signal is generally referred to
as a hardware trigger signal.
A rising edge or a falling edge of the external signal can be used to trigger frame acquisition.
The
Trigger Activation
parameter is used to select rising edge or falling edge triggering.
Assuming that the camera is in a
waiting for exposure start trigger
acquisition status, frame
acquisition will start whenever the appropriate edge transition is received by the camera.
When the camera receives an external trigger signal and begins exposure, it will exit the
waiting
for exposure start trigger
acquisition status because at that point, it cannot react to a new
exposure start trigger signal.
As soon as the camera is capable of reacting to a new exposure start trigger signal, it will
automatically return to the
waiting for exposure start trigger
acquisition status.
When the camera is operating under control of an external signal, the period of the external
trigger signal will determine the rate at which the camera is acquiring frames:
For example, if you are operating a camera with an External trigger signal period of 50
㎳
(0.05
s):
So in this case, the frame rate is 20 fps.
