LIN error frame

[Madottati]

I have an XNET LIN card as master. When I start to send data, I see error frames in the XNET Bus Monitor, where the payload= 0x01, 0x05, 0x3C...

this means, there is an error occured by transmitting frame with ID=0x3C. 

My question is, what can be the reason of getting 0x05 (according XNET HW/SW manual "timeout")?

I tried to search on the internet for this, no results...

[Hooovahh]

I don't work with LIN too often, but I suspect this is a timeout waiting for the slave's data.  A master will send the ID for the data it wants, and then it is the responsibility of the slave to send the data for that ID.  Each ID you send should have a corresponding single device that will send that.  Some times it is the master itself, which is how the master can send data.  But most of the time the ID needs corresponds to another device on the bus, which will act as a read.

If the master sends the ID, and then no slave populates the data, then I'd expect a timeout error.  This might happen if the slave isn't powered, isn't connected, or the ID doesn't correspond to any slave.  Also if you want to know more about LIN I just made a blog post on it that compares it to CAN and covers some of this.

[ZY_Ong]

ID 0d60 (0x3C) and 0d61(0x3D) are reserved for diagnostics. Please refer to shipping example LIN Diagnostic Frame Master.vi and LIN Diagnostic Frame Slave.vi from NI Example Finder >> Hardware Input and Output >> LIN >> NI-XNET >> Advanced.