National Instruments NI 1712 User Manual - page 77
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B-5
NI 17xx User Manual
There is No External Lighting Strobe
Possible causes and solutions:
•
If you have configured the NI Smart Camera for triggering in MAX or Vision Builder AI,
verify that the smart camera is receiving a trigger. This can be verified by checking that the
IMG ACQ LED on the smart camera illuminates when a trigger is provided on the
TrigIn+/IsoIn(0)+ and TrigIn-/IsoIn(0)- pins. If you are not receiving a trigger, refer to the
No Trigger is Received
troubleshooting section.
•
If you are using the 24 V strobe output, verify that there is enough time between frames for
the strobe output to fully turn off before being re-enabled. The required time will vary with
the load conditions, but is typically a few milliseconds. If a faster response is necessary, use
the 5 V strobe output.
•
Make sure that you have enabled the corresponding external lighting strobe in MAX or
Vision Builder AI. Complete one of the following procedures to enable the correct lighting
strobe.
MAX
1.
Launch MAX.
2.
In the Configuration tree, expand
Devices and Interfaces
.
3.
Expand
NI-IMAQ Devices
.
4.
Expand the smart camera you are using.
5.
Select the channel you are using.
6.
Select the
Lighting
tab.
7.
Select the appropriate strobe from the
External
Strobe Generation
control.
Vision Builder AI
1.
Launch Vision Builder AI.
2.
In the
Acquire Image (Smart Camera)
step, select the
Lighting
tab.
3.
Select the appropriate strobe from the
External
Strobe Generation
control.
Triggering Problems
No Trigger is Received
If you are not receiving a trigger, verify the following:
•
The trigger is wired to the TrigIn+/IsoIn(0)+ and TrigIn-/IsoIn(0)- signals.
•
If TrigIn/IsoIn(0) and IsoIn(1) are both being used, that the devices they are connected to
are either both sinking (NPN) or both sourcing (PNP).
•
The trigger is connected correctly based on the type of sensor it is—sourcing or sinking.
Refer to the
Isolated Inputs
section of Chapter 4,
Connecting Lighting and External
Devices
, for information about connecting isolated inputs.