Black jaguars: not working

[Bryscus]

Originally Posted by ellisk

Yes, we've tried the other suggestions. The cable is fine, it's plugged in on the left, there is a 100 ohm resistor on the left jack, and I can see the driver loading on the console when the cRIO boots.

I have been having an issue with intermittent signals getting to the Jags. We currently have updated the firmware on both Jags connected (One black and one gray each with its respective firmware update) through the RS232 port on the cRio. There is a 100 ohm termination resistor inside the DB9 shield between CANL and CANH (the green and red wires). There is a 6 pin cable running from the RS232 to CAN inverter to the LEFT port of the black Jag. I have then tried both a 4pin and 6pin cable from the RIGHT port of the black Jag to the LEFT port of the gray Jag (just to see if I had made a bad cable). I then created a short Termination cable that only has a 100ohm resistor between the green and red wires. This short cable is plugged into the RIGHT port of the Gray Jag. I have tried communications with and without this termination cable and get similar results.

If I just send the Jags a constant max output value, they will run and then sputter, and then run, yada yada yada. It sounds as if I have a physical layer problem - i.e., signals not propagating properly.

Also, I have obviously been able to connect with BD-COM to assign IDs and re-flash the firmware...


So my questions are:

Should the termination resistor be on the cable at the LEFT port of the Gray Jag, or is it correct the way I have it?

Has anyone else been able to get a connection, but suffers from intermittent signal loss?

- Bryce

P.S. I have attached some pictures of errors that I am receiving in the NetConsole.

P.S.S. This is somewhat of a bummer, because I have written code to make use of the Speed and Position modes, but can't test it until I at least have a reliable communication interface...