Balluff MATRIX VISION mvBlueNAOS, Technical Manual

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1.13 GenICam and advanced features 73
1.13.5 Counter And Timer Control
The "Counter And Timer Control" is a powerful feature which MATRIX VISION customers already know under the
name Hardware Real-Time Controller (HRTC). MATRIX VISION cameras provide:
• 4 counters for counting events or external signals (compare number of triggers vs. number of frames; over-
trigger) and
• 2 timers.
Counter and Timers can be used, for example,
• for pulse width modulation (PWM) (p. 162 ) and
• to generate output signals of variable length, depending on conditions in camera.
This achieves complete HRTC functionality which supports following applications:
• frame rate by timer
• exposure time by timer
• pulse width at input
The "Counter And Timer Control" contains features like
Feature name (acc. to SFNC
(p. 121 ))
Property name (acc. to mvIMPACT
Acquire (p. 119 ))
Description
CounterSelector counterSelector Selects which counter to configure.
CounterEventSource[Counter
←
-
Selector]
counterEventSource Selects the events that will be the
source to increment the counter.
CounterEventActivation[Counter
←
-
Selector]
counterEventActivation Selects the activation mode event
source signal.
etc.
TimerSelector timerSelector Selects which timer to configure.
TimerDuration[TimerSelector] timerDuration Sets the duration (in microseconds)
of the timer pulse.
TimerDelay[TimerSelector] timerDelay Sets the duration (in microseconds)
of the delay.
etc.
related to the usage of programmable counters and timers.
Because there are many ways to use this feature, the list of use cases is long and not finished yet:
• Processing triggers from an incremental encoder (p. 160 )
• Creating different exposure times for consecutive images (p. 166 )
•
Creating synchronized acquisitions using timers
(p. 204 )
• Generating a pulse width modulation (PWM) (p. 162 )
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