66
•
Contents
Nano-5G Series GigE Vision Camera
I/O Module Block Diagram
Line Selector =
Line 1 to 4
Physical
Line
Event Driven
Input
inverter
Output
inverter
Software Driven
Pulse
generator
LineStatus
Trigger
Line
Activation
Trigger Signal
Timer
TimerEnd Event
CounterEnd Event
Software Trigger
Cmd
Line
Mode
Input
or
ouput
Input
Output
Timer and Counter Module
Counter
Line
Debouncer
Event Driven
Trigger
Source
Trigger Module
Output
Line
Source
Signal Driven
Software Driven
Line
Detection
Level
Trigger Mode Details
Genie Nano-5G image exposures are initiated by an event. The trigger event is either the camera
’
s
programmable internal clock used in free running mode, an external input used for synchronizing
exposures to external triggers, or a programmed function call message by the controlling
computer. These triggering modes are described below.
•
Free running (Trigger Mode=Off)
: The Nano-5G free-running mode has programmable
internal timers for frame rate and exposure period. Frame rate minimums, maximums, and
increments supported are sensor specific. Maximum frame rates are dependent on the required
exposure.
•
External trigger (Trigger Mode=On)
: Exposures are controlled by an external trigger signal
where the specific input line is selected by the
Trigger Source
feature. External signals are
isolated by an opto-coupler input with a time programmable debounce circuit.
Trigger Source Types (Trigger Mode=On)
•
Trigger Source=Software
: An exposure trigger is sent as a control command via the
Ethernet network connection. Software triggers cannot be considered time accurate due to
network latency and sequential command jitter. But a software trigger is more responsive than
calling a single-frame acquisition since the latter must validate the acquisition parameters and
modify on-board buffer allocation if the buffer size has changed since the last acquisition.
•
Trigger Source = Line 1 or 2
: An external trigger signal is opto-coupled and subject to a
signal debounce, input delay, plus inversion circuits.
•
Trigger Line Polarity
: For external line signals, a rising edge signal is suggested to minimize
the time it takes for the opto-coupler to change state.
•
Trigger Source=Timer1End Event
: The Timer1 End Event is used as the internal trigger
for information on those features.
•
Trigger Source=Counter1End Event
: The Counter1 End Event is used as the internal trigger
source.
Summary of Contents for Genie Nano-5G Series
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