CANopen nodes

I talk with a few Parker SSD drives using CANopen.  When I was talking only to a single player (690 +), I was able to do everything with PDP and everything worked fine.  Using PDO I could start to LABView, then turn on the player and the program would begin to speak without problem.  But now I'm talking to another drive (590 +) at the same time.  I decided to use SDO when you talk with the two SSDS instead of the PDP because it seemed easier to read/write data.  I need to start LV before SSD drives to ensure that certain relays are properly defined.

So I have a few questions.

The first problem is that as soon as I start my program of LV, I get errors SDO because SSDS are not turned on and running.  So I try to find a way for LV search different SSD readers before trying to send/receive their.  Some how the PDO is there but not of the SDO.

Another problem is in talks with both drives at the same time, I think I mess up the configuration somehow.  CANopen vi example only shows how talking with 1 device at once, is there examples on how to install talking with 2 devices?  I can run SDOread.vi on each device, so I know that I have the communication.  I left the default configuration values in the SDOcreate.vi.  I tried looking for info on the COB ID server and customer ID s/n settings, but I still found nothing.

Thanks for any help...

Well, I went back to the use of the PDO.  There was a problem with some of the SDO addresses on one of the units, so I had no choice.

Tags: NI Products

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