CanOpen

[Veganic]

Hello, I have a simple Canopen network. Everything seems to be working ok, data is being transmitted etc, but.... I have a flashing error light on the FX2N-32CAN module. Bit 14 is set in BFM 29. This is listed as "Error passive state." What exactly is this indicating? How do I make it go out? (I've tried writing 0 to BFM29) Thanks!

[kaare_t]

Is it only bit14 in BFM29 that is active, or are there more bits active?

[Veganic]

Just bit 14 and then not always ( delayed switching to run of the FX sometimes means I don't get the flashing error led)

[kaare_t]

When, or after the error occurs, do the bus still function properly (you can send/receive data from one or more nodes)??

[Veganic]

Yes, all works ok.

[kaare_t]

Sound like you have either a TPDO or RPDO that's not in contact with the corresponding node. How did you configure the PDO's (PLC program? 3. party tool?). What do the configuration look like now, and what nodes do you currently have in your network?

[Veganic]

PDOs are configured in the PLC. I'll check there is no error and see if the led goes out. Thanks.

[kaare_t]

Let us know how it works out....

[Veganic]

That seems to have worked...I had calculated the PDOs based on the BFMs being words (2 bytes) but they are double words (4 bytes)...I think. My next challenge is to try and increase the number of PDOs to greater than 4.

[kaare_t]

Did you program the 4 PDO's yourself, or did you use the default settings? If you've used the default settings it will require some programming to accomplish adding PDO's....

[Veganic]

I'm trying to program as much as possible so that I understand what is happening. The biggest problem is finding the information. This is just a "research" project so at least I don't have a deadline. I only have an FX1n to play with so can't use the beijers function blocks.

[kaare_t]

OK, but you're able to open the FBs and see how it's programmed?