I Know it
In last post I had haste...
My PLC sends the trigger to 24v and I want to transform it to a LVDS signal (differential signal)
TTL-Module + Matrox Meteor II / CL + Basler L101 2k
1. Well, First see the attach.
2. To Send a LVDS signal, I bought a TTL-MODULE from EPIX inc. (visit web)
3. I ask if they can change the pin out (DB9 diff-connector) of the TTL-MODULE to the configuration of the Matrox II / CL. they do it.
- Pin3 --> LVDS trigger ( - )
- Pin6 --> Ground
- Pin8 --> LVDS trigger ( + )
4. Also is needed to ajust de DCF or Ajust parameters of the Framegraber via Visual Basic.
DCF customization:
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-Open the DCF you have been using in Intellicam; -Select the "Exposure Signal" tab; -Select the "Timer 1" tab; -In the "Trigger Info" section
-Select "digital port"
-Select "RS-422"
-Select "positive edge"
-Perform "save as" of your customized DCF;
Note: RS-422 in the aforementioned drop down list should actually read differential in this specific case.
VB customization:
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'' LVDS
FormDigitizer.Digitizer1.TriggerEnabled = True
FormDigitizer.Digitizer1.UserInFormat = digLVDS
FormDigitizer.Digitizer1.TriggerMode = digLevelHigh
FormDigitizer.Digitizer1.TriggerSource = digHardwarePort1
Also use digLevelHigh to be more immune to interferences / EMI (false triggers)
I test it and it works very OK, zero or near zero false triggers with LVDS.
I hope it helps.
Pau
PD: I must improve my English.