Hi all, I¹m just getting started with the etherlab master stack, and really ethercat in general, so please excuse my ignorance. So far I have read the documentation I have found (ethercat-1.5-***.pdf) as well was the readme and install files, then I followed the directions to get the driver installed. I also cobbled together some beckhoff ethercat modules including an EK1101, 3 EL2024s, and an EL2612 as well as an EL9010 terminator. I got everything startup up and an able to use the command line tool to do a few queries to find that it sees all the slices properly and can change the operational state. One thing is bothering me so far: when I first plug in the ethercat modules I get the following output in dmesg:
EtherCAT 0: Link state changed to UP. EtherCAT 0: 6 slave(s) responding. EtherCAT 0: Slave states: INIT. EtherCAT 0: Scanning bus. EtherCAT 0: Bus scanning completed in 440 ms. EtherCAT ERROR 0: Failed to calculate bus topology. EtherCAT 0: Slave states: PREOP. I don¹t understand what the ³Failed to calculate but topology² message means, nor what I need to do to avoid it. Any help would be appreciated. Thanks, Steve
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