Digital I/O
route PXI trigger on Backplane
I have an ADLINK PXIs-3320 chassis which comes with 15-Slot PXI backplane. I have to route trigger signals across the buses. I know that the backplane of this chassis is divided into three independent PCI buses or segments and each bus has its own set of eight PXI Trigger Lines, that by default ARE NOT connected to each other.
My first objectif is sending a signal from example from the device install in the slot 3 to the other one in slot 13 using the backplane through one of the 8 trigger lines. When this part works I will send a signal from the slot 2 to the rest slots.......
After identifying the ADLINK PXI controller and chassis in NI MAX v4.5, I used VISA to route the trigger lines.
I want to route the line 7 from the segment Bus 1 outward to the other trigger buses. I know that I need to first route “Trigger Bus 1(source) line TTL-7” to “Trigger Bus 2(destination) line TTL-7” and then route “Trigger Bus 1(source) line TTL-7” to “Trigger Bus 3 (destination) line TTL-7”.
The problems comes when I use viMapTrigger() to set the trigger routes, after executing, I can see always the same error. I cannot resolve this problem because there are not any information. I was trying all the possible combinations and it doesn’t work. Maybe I need to set other attributes…..
Return status code: 0xBFFF0042
Status name: VI_ERROR_LINE_IN_USE
The specified trigger line is currently in use.
Someone can read the file which I attach and help me????
Thanks in advance for your answer,
yours sincerely,
Veronica Afonso Rodriguez
Electronic Engineer
